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Carbon sequestration amount evolution characteristics and reaction mechanisms in coal-based solid waste backfill:A new whole-process carbon sequestration technique 认领 引用 被引量：2
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作者 Nan Zhou Jixiong Zhang +1 位作者 Yuzhe Zhang Hao Yan 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2026年第1期43-55,共13页
Underground carbon sequestration(CS)by solid waste backfill(SWB)offers an effective pathway for collaborative disposal of coal-based solid waste and CO2,where the amount of carbon sequestration is an important eval... Underground carbon sequestration(CS)by solid waste backfill(SWB)offers an effective pathway for collaborative disposal of coal-based solid waste and CO2,where the amount of carbon sequestration is an important evaluation parameter.In this study,the concept of whole-process carbon sequestration using coal-based solid waste and CO2,including sequential stirring and curing stages,was proposed to evaluate the performance evolution of CS.The results showed that CO2 pressure and ambient temperature positively correlated with the CS amount from coal-based SWB.In particular,CO2 pressure prevailed in the stirring stage,while the ambient temperature effect was more significant in the curing stage.The CS amounts obtained during the stirring stage alone,the curing stage alone,and two sequential stages ranged from 0.66%–3.10%,3.53%–5.09%,and 5.12%–6.02%,respectively.The functional group and micromorphology analyses revealed that the prevailing mechanism at the CS stirring stage was the stirringdriven gas dissolution-leaching-mineralization reaction,while that at the curing stage was the hydration-driven gas permeation-dissociation-CS reaction.Both were essentially solid-liquid-gas multiphase chemical reactions.The results are instrumental in substantiating the coal-based SWB carbon sequestration evolution patterns and mechanisms and providing data support for waste disposal and carbon emission reduction in the coal industry. 展开更多
关键词 Whole-process carbon sequestration Stirring stage Curing stage Carbon sequestration performance evolution Ambient temperature CO2pressure
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Neglected but significant:High mercury alkylation but low carbon sequestration in paddy field as revealed by soil profiles survey 认领 引用
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作者 Kaikai Fang Yan He +3 位作者 Shengting Rao Jian Wang Jianming Xu Jiachun Shi 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期301-310,共10页
The global environmental crisis caused by simultaneous increasing mercury(Hg)alkylation and organic carbon deficit has restricted the implementation of the“One Health”framework.Here,we report a neglected but signifi... The global environmental crisis caused by simultaneous increasing mercury(Hg)alkylation and organic carbon deficit has restricted the implementation of the“One Health”framework.Here,we report a neglected but significant phenomenon of high Hg alkylation but low carbon sequestration in paddy field through soil profiles survey deep to the parent material horizon(defined as deepsoil).We found that ratios of Hg methylation and ethylation were increased by 69.0%and 64.2%in deepsoil compared to that in topsoil(P<0.05).This inhibition of Hg alkylation in topsoil is likely regulated by Nitrosomonadaceae(enriched by 64.9%vs.deepsoil),which harbors the merA gene(Hg demethylation marker).Furthermore,through deciphering molecular level of dissolved organic matter,we found the content of labile carbon increased by 12.7%,compared to those in topsoil.Conversely,in deepsoil,labile carbon(e.g.,carbohydrates)enriches Spirochaetaceae(abundance+69.2%,carrying the hgcA gene for Hg methylation),thereby facilitating Hg alkylation.This microbial shift enhanced Hg alkylation in deepsoil relative to topsoil.In summary,this study bridges human health,microbial ecology,and climate resilience(carbon storage)within the“One Health”paradigm,revealing depth-dependent mechanisms that reconcile soil Hg remediation with carbon management for sustainable agroecosystems. 展开更多
关键词 Dissolved organic matter(DOM) Methylmercury(MeHg) Ethylmercury(EtHg) Organic carbon sequestration Paddy soil
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Multiphysics modeling of thermo-hydraulic fracturing during CO2sequestration in multilayered reservoirs at Ordos,China 认领 引用
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作者 Yi Li Yinjiang Liu +2 位作者 Quanlin Zhou Hao Yu Bin Chen 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第2期1233-1249,共17页
The increase in CO2injectivity and shifting of CO2-absorbing layers in multilayered geological CO2sequestration(GCS)reservoirs in Ordos,China indicate significantpermeability variations in certain layers.To c... The increase in CO2injectivity and shifting of CO2-absorbing layers in multilayered geological CO2sequestration(GCS)reservoirs in Ordos,China indicate significantpermeability variations in certain layers.To capture these system changes,a numerical model incorporating all 21 aquifers and internal aquitards was developed.The monitored pressure was well matched through multiphase and thermalhydraulic-mechanical(THM)coupling numerical simulations by introducing permeability variations.The results revealed that the permeability in the second layer increased on approximately day 13 due to the abrupt pressure buildup and temperature decrease.Even such a low rate of CO2(2.8 kg/s)injected into the low permeability system initiated some fractures and the permeability in the second layer around the wellbore increased by 722 times.The second critical system change occurred on approximately day 386.As demonstrated in the numerical simulation,the substantial injection of cold CO2induced strong thermal stress,leading to rock contraction and the initiation of several cracks.The permeability of the firstlayer around the wellbore unexpectedly increased by 4 orders of magnitude.Since no additional pressure could drive the CO2into the remaining 17 layers,the total storage capability of the multilayered system was reduced.A whole picture of the system variation is fully presented and the underlying mechanisms are analyzed.It is believed that the phenomenon of thermal-hydraulic fracturing observed in this fieldand the simulation procedures will benefitother fluidinjection and production works in various geotechnical settings. 展开更多
关键词 Geological CO2sequestration(GCS) Thermal-hydraulic-mechanical(THM) couplings Thermal-hydraulic fracturing Monitoring analysis Fracture flow Field data
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Positive or negative relationship between forest fragmentation and carbon sequestration capacity across different urban agglomerations in China 认领 引用
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作者 Xinyu Wang Zhibin Ren +4 位作者 Chengcong Wang Peng Zhang Shengyang Hong Ruoxuan Geng Boyang Zhang 《Journal of Forestry Research》 SCIE EI CAS CSCD 2026年第3期159-179,共21页
Forest fragmentation is a key ecological process influencing the functions of forest ecosystems,particularly in the context of rapid urbanization.However,at the national scale,the regional changes of forest fragmentat... Forest fragmentation is a key ecological process influencing the functions of forest ecosystems,particularly in the context of rapid urbanization.However,at the national scale,the regional changes of forest fragmentation and its effects on forest carbon sequestration capacity(CSC)remain unclear in urban agglomerations.Based on the established Forest Fragmentation Index(FFI),this study assessed the regional heterogeneity of forest fragmentation and systematically analyzed the nonlinear response of CSC to FFI,using a piecewise linear regression model,an XGBoost-SHAP framework,and PLS-SEM.We found that the average FFI across all urban agglomerations was 0.45,with 54.96%of the area exhibiting moderate fragmentation(FFI=0.4−0.6).The average FFI in urban agglomerations was highest in subtropical monsoon climate(SMC)zones and lowest in temperate continental climate(TCC)zones.CSC showed a distinct spatial pattern of“stronger in low latitudes and coastal(eastern)regions,weaker in high latitudes and inland(western)regions”.Nationally,34.4%of the regions exhibited CSC levels ranging from 400 to 600 g·m-2·a-1,with the highest mean CSC in SMC and the lowest in TCC.We identified clear FFI thresholds affecting CSC across different climate zones:0.48 in TCC,0.39 in temperate monsoon climate(TMC),and 0.36 in SMC.While low levels of fragmentation may have marginal positive effects,high fragmentation significantly threatens CSC.Moreover,in the TCC zone,temperature was the dominant driver,with FFI enhancing CSC primarily through positive pathways mediated by temperature and leaf area index(LAI).In contrast,in the TMC and SMC zones,evapotranspiration(ET)was the dominant factor,and FFI suppressed CSC by reducing LAI and ET.This study reveals the complex mechanisms by which forest fragmentation,coupled with multiple factors,drives CSC,providing scientific insights for urban forest management and carbon neutrality policies. 展开更多
关键词 Urban agglomerations Climate zones Forest fragmentation Carbon sequestration capacity
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Spatiotemporal Patterns and Drivers of Vegetation Carbon Sequestration in Shandong Province,China 认领 引用
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作者 WEI Feili LIU Dahai +6 位作者 WU Shuyao LYU Shuang HAN Zhibo WANG Yongxun REN Yongqiang LI Xiaoxuan LIU Zhenhang 《Chinese Geographical Science》 SCIE CAS CSCD 2026年第1期157-170,I0008-I0014,共14页
Understanding the dynamics of vegetation carbon sequestration(VCS)is essential for regional carbon neutrality strategies.This study revealed the spatiotemporal patterns of VCS and its relationship with anthropogenic c... Understanding the dynamics of vegetation carbon sequestration(VCS)is essential for regional carbon neutrality strategies.This study revealed the spatiotemporal patterns of VCS and its relationship with anthropogenic carbon emissions(ACEs)in Shandong Province,China during 2000-2020,and identified the sensitivity factors affecting VCS.The results show that:1)VCS increased consistently from 193.45 million t to 256.41 million t,with high values areas concentrated in the central,northeastern,and southeastern mountainous and hilly regions,while low values were found in water bodies and urban built-up areas.At the city level,Linyi,Yantai,Binzhou,and Jinan experienced the most significant rises-reaching up to 243000 t/yr.At the county level,Pingdu,Qixia,and Yiyuan also showed substantial growth,each exceeding 30400 t/yr.2)Digital Elevation Molde(DEM)was identified as the dominant natural factor influencing VCS distribution,while land use optimization measures,especially afforestation and farmland conversion in sloped terrain,were the primary human drivers of VCS increase.3)Urbanization and carbon neutrality were not mutually exclusive.While urban expansion locally reduced VCS,rural emigration enhanced carbon sinks in surrounding areas,partially offsetting urban losses.This compensatory mechanism supported VCS increases in nearly all cities and 90% of counties.Nevertheless,with ACEs continuing to rise and the offset ratio by VCS declining,achieving carbon neutrality requires regional strategies that integrate with accelerated energy conservation,emission reduction technologies,and energy transition.These findings provide a scientific basis for decomposing carbon neutrality targets across cities and counties in Shandong and a reference for developing localized land use policies in similar regions. 展开更多
关键词 vegetation carbon sequestration(VCS) anthropogenic carbon emissions(ACEs) carbon neutrality targets land use management Shandong Province,China
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NMR-monitored CH4 adsorption/desorption dynamics in shale:Implications for CO2-ESGR and in-situ sequestration 认领 引用
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作者 Sheng-Ming Huang Guan-Cheng Jiang +7 位作者 Jun Yang Chun-Ping Guo Quan-De Wang Teng-Fei Dong Yin-Bo He Li-Li Yang Qing-Gong Liu Zhe-Hui Jin 《Petroleum Science》 SCIE EI CAS CSCD 2026年第2期868-881,共14页
Addressing the inherent challenges of low recovery rates and difficulties in shale gas extraction,this study investigates the application potential of CO2-enhanced shale gas recovery(CO2-ESGR)coupled with carbon... Addressing the inherent challenges of low recovery rates and difficulties in shale gas extraction,this study investigates the application potential of CO2-enhanced shale gas recovery(CO2-ESGR)coupled with carbon sequestration(CS).Utilizing low-field nuclear magnetic resonance(NMR)technology,we conducted real-time monitoring of methane adsorption and desorption processes within collected shale samples.Through the analysis of T2 spectra and corresponding peak areas,we achieved quantitative differentiation among adsorbed CH4,free CH4 within pore spaces,and free CH4 within fractures.The results demonstrate that within a pressure range of 0.01-10 MPa,the total methane volume increased progressively from 79.4 to 177.83 cm3/g.Following CO2injection,a significant weakening of the short-T2signal(representing adsorbed CH4)was observed,accompanied by a concomitant enhancement of the long-T2 signal(representing free-phase CH4).Furthermore,depressurization desorption experiments revealed that CO2injection increased the methane desorption rate by approximately 10%,while simultaneously facilitating the long-term,stable sequestration of CO2within the shale matrix.These findings not only validate the mechanism of competitive adsorption,whereby CO2enhances shale gas recovery,but also highlight the significant carbon sequestration potential of shale reservoirs.Consequently,this research provides a crucial theoretical basis and technical support for advancing both shale gas development and carbon emission reduction strategies. 展开更多
关键词 Multi-phase CH4desorption Competitive adsorption Nuclear magnetic resonance(NMR) CO2-enhanced shale gas recovery(CO2-ESGR) Carbon sequestration
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Effect evaluation of carbon sequestration of grassland ecological compensation policy:Evidence from China’s Yellow River Basin 认领 引用
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作者 Xiao Zhang Daoxiong Chen Shunbo Yao 《Chinese Journal of Population,Resources and Environment》 CSCD 2026年第1期27-40,共14页
The Grassland Ecological Compensation Policy(GECP)is a large-scale project that has been investing in China since 2011.Despite the significant investment and long duration of the GECP,its impact on carbon sequestratio... The Grassland Ecological Compensation Policy(GECP)is a large-scale project that has been investing in China since 2011.Despite the significant investment and long duration of the GECP,its impact on carbon sequestration in grasslands remains unclear.Based on panel data from prefecture-level cities in the Yellow River Basin(YRB)from 2000 to 2020,this study explored the effects of the GECP on grassland carbon sequestration in the YRB and its heterogeneity using a time-varying difference-in-differences(TV-DID)model.Subsequently,we predicted changes in carbon sequestration in grasslands under the influence of the GECP from 2021 to 2040 using a simulation.The main conclusions are as follows:First,the implementation of the GECP promoted carbon sequestration in grasslands.This conclusion was validated after conducting a series of robustness tests.Moreover,the effects of the GECP were heterogeneous across different geographical locations,highway densities,and grassland areas.Finally,the simulation results indicated that over the next 20 years,grassland carbon sequestration will generally increase but exhibit cyclical changes.The government should align the principles and objectives of the GECP with local geographic conditions,resource availability,and socio-economic development.It must formulate and implement tailored policies that maximize the ecological protection benefits of the GECP and promote carbon sequestration in the grasslands of the YRB. 展开更多
关键词 Grassland ecological compensation policy Grassland carbon sequestration Time-varying difference-in-differences model Heterogeneity analysis Simulation test
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Bridging Land and Ocean–An initiative for coastal wetland carbon sequestration under the UN Ocean Decade Global ONCE Program 认领 引用
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作者 Si-yuan Ye Hans Brix +3 位作者 Liu-juan Xie Brian Keith Sorrell Carles Ibáñez Nian-zhi Jiao 《China Geology》 CAS CSCD 2026年第1期219-220,共2页
On July 2nd,2025,32 scientists representing 15 countries gathered at Tartu,Estonia to make on-site endorsements for the Global ONCE(Ocean Negative Carbon Emissions)Program at the 12th INTECOL Wetlands Conference.Th... On July 2nd,2025,32 scientists representing 15 countries gathered at Tartu,Estonia to make on-site endorsements for the Global ONCE(Ocean Negative Carbon Emissions)Program at the 12th INTECOL Wetlands Conference.This marks a significant milestone for ONCE in establishing a systematic framework for coastal wetland carbon sequestration research and global collaboration(Figs.1,2).Coastal wetlands are critical transition zones linking terrestrial and marine ecosystems,yet they face severe degradation from anthropogenic land-based activities and sea level rise that propagate impacts to the ocean.As a UN Ocean Decade Program,the Global ONCE Program champions interdisciplinary and cross-regional collaboration to enhance carbon sequestration in the ocean and coastal wetlands through science and innovation.Aligned with the Tartu Declaration on Wetlands that includes resolutions to promote the rights of global wetlands(especially peatlands)and advance the discipline of wetland science based on facts,this initiative addresses key knowledge gaps in land-ocean interactions.The goal is to harness the full potential of coastal wetlands and ocean systems for climate mitigation,thereby laying a scientific foundation for international policy formulation and implementation. 展开更多
关键词 coastal wetlands carbon sequestration ocean negative carbon emissions climate mitigation Tartu Declaration establishing systematic framework interdisciplinary collaboration UN Ocean Decade
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Chemical fertilizer and liming-induced changes in aluminum,iron oxides and soil organic carbon fractions:Implications for carbon sequestration in an upland red soil 认领 引用
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作者 Mahmoud Abdelaziz Zhe Shen +9 位作者 Dongchu Li Lu Zhang Dong Ai Jun Yan Kiya Adare Tadesse Imtiaz Ahmed Chu Zhang Chunhong Wu Jiwen Li Huimin Zhang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第8期3412-3426,共15页
Lime application represents an established approach for ameliorating soil acidity,and understanding its effects on the interactions between aluminum(Al)and iron(Fe)oxides and soil organic carbon(SOC)fractions is essen... Lime application represents an established approach for ameliorating soil acidity,and understanding its effects on the interactions between aluminum(Al)and iron(Fe)oxides and soil organic carbon(SOC)fractions is essential for promoting sustainable agricultural practices that enhance carbon sequestration.This investigation examined the interactions among Al and Fe oxides and SOC fractions under long-term fertilization and liming.A long-term field experiment was implemented with five treatments:CK(no fertilizer),N(nitrogen fertilizer),NCa(N plus lime),NPK(nitrogen,phosphorus,and potassium fertilizer),and NPKCa(NPK plus lime).Soil samples were obtained from three depths:0-10,10-20,and 20-30 cm.The findings revealed that lime application increased SOC by 20.84%under the N treatment but decreased SOC by 9.97%under NPK.At the 0-10 cm depth,dissolved organic carbon(DOC)was substantially higher under NCa(410.51 mg kg-1)and NPKCa(372.83 mg kg-1)compared with CK.Particulate organic carbon(POC)and mineral-associated organic carbon(MAOC)demonstrated consistent enhancement under NPK and NPKCa across all soil depths compared with CK.DOC exhibited significant positive correlations with both aluminum(Ald),reactive aluminum(Alo)and aluminum(Alp),indicating a key role of organically bound and reactive Al in carbon dynamics.Compared to the CK treatment,SOC stock increased significantly by 43.49%under NPK and by 36.82%under NPKCa.Structural equation modeling demonstrated that lime application mitigated the negative effects of free Al(Ald)on carbon sequestration,while Fe oxides(Fed)contributed positively to SOC stabilization.DOC showed no significant impact on carbon sequestration rate(CSR),while easily oxidizable carbon(EOC)negatively affected CSR directly.These results highlight the crucial role of lime in improving acidic soil conditions and enhancing the stability and sequestration of soil organic carbon. 展开更多
关键词 nitrogen fertilizer lime carbon fraction carbon sequestration aluminum and iron oxide
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Sustainable alternative to biochar:Effects of oxychar on soil carbon sequestration pathway and microbial communities 认领 引用
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作者 Cheng Ji Chenchen Zhao +8 位作者 Shutao Wang Qinggang Meng Huiwei Zhao Yifan Li Duo Li Mingzhen Xing Shiming Su Bing Han Wei Liu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期823-833,共11页
The rapid development of agriculture poses significant challenges to carbon sequestration and sustainable agriculture due to frequent plowing cultivation,has resulted in a notable decline in soil quality.The applicati... The rapid development of agriculture poses significant challenges to carbon sequestration and sustainable agriculture due to frequent plowing cultivation,has resulted in a notable decline in soil quality.The application of carbon materials is regarded as a synergistic and effective approach for conserving organic carbon,increasing microbial activity,and promoting plant growth.To explore whether oxychar can serve as a substitute for traditional biochar(HBC)in enhancing soil carbon sequestration,a method combining a 680-day field experiment with a pot experiment was adopted to assess the impacts of oxychar on soil carbon sequestration,microbial communities,and rape growth.The study revealed that the addition of oxychar reduces soil pH,increases soil electrical conductivity and CO2emissions,and achieves carbon sequestration by increasing the content of readily oxidizable organic carbon in the soil.The soil carbon pool management index of the oxychar treatment(131.32)was significantly higher than that of the traditional biochar treatment(101.93),indicating that oxychar has higher ability to improve soil organic carbon quality.Both the oxychar and HBC treatments improved the richness and diversity of the soil bacterial community.However,oxychar indirectly influenced the soil microbial community by increasing soil electrical conductivity and promoted soil carbon sequestration through carbohydrate metabolism.And,oxychar could promote plant growth in many ways.In general,this study provides a theoretical basis for the practical application of oxychar replacing HBC in soil carbon sequestration. 展开更多
关键词 Oxychar Biochar Soil carbon sequestration Microbial community
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Engineering tuber crops for carbon sequestration:genetic improvement strategies and technological advances 认领 引用
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作者 Zhihua Mu Shuya Yang +5 位作者 Ke Deng Tiancang Na Heng Guo Yun Zhou Long Zhao Jian Wang 《Tropical Plants》 CSCD 2026年第1期49-60,共12页
Root and tuber crops(RTCs),such as potato,cassava,and sweet potato,are globally critical staple foods and exhibit substantial potential for carbon sequestration.Their unique source-sink-flow synergy,high photosyntheti... Root and tuber crops(RTCs),such as potato,cassava,and sweet potato,are globally critical staple foods and exhibit substantial potential for carbon sequestration.Their unique source-sink-flow synergy,high photosynthetic efficiency,and underground carbon storage capacity make them pivotal for climate change mitigation.However,RTCs face inherent bottlenecks:inefficient C3 photosynthesis with photorespiratory losses,source-sink imbalance,and inadequate low-carbon management practices.To address these limitations,this review synthesizes genetic engineering strategies(e.g.,optimizing Rubisco function,introducing C4/CAM pathway elements,enhancing sink strength via AGPase and sugar transporters),and improved field management(e.g.,balanced fertilization,crop rotation,biochar application,and IoT-based precision agriculture).These integrated approaches synergistically boost carbon fixation,optimize carbon allocation,and strengthen soil carbon sinks.RTCs thus represent a promising avenue to reconcile food security with carbon neutrality goals,providing actionable pathways for developing climate-resilient and sustainable agricultural systems globally. 展开更多
关键词 carbon storage c photosynthesis carbon sequestration photosynthesis carbon sequestrationtheir root tuber crops root tuber crops rtcs such genetic engineering
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Effective sequestration of phosphate by ultrasmall hydrated Zr(Ⅳ) oxide nanoparticles confined inside the PEI-crosslinked chitosan beads 认领 引用
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作者 Rui Ma Xinjie Cui +3 位作者 Youyi Liu Qianhui Xu Weiwei Wang Guangze Nie 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期596-610,共15页
Nanocomposites fabricated through the encapsulation of hydrated Zr(Ⅳ) oxide(HZO) nanoparticles within millimeter-scale hosts have emerged as promising candidates for phosphate sequestration from water.However,achievi... Nanocomposites fabricated through the encapsulation of hydrated Zr(Ⅳ) oxide(HZO) nanoparticles within millimeter-scale hosts have emerged as promising candidates for phosphate sequestration from water.However,achieving ultrasmall nanoparticles within these hosts that maintain high decontamination reactivity is still a significant challenge.Herein,a novel nanocomposite(denoted HZO@CS-PEI) was obtained by confining the growth of HZO in dual crosslinked network hydrogels composed of interpenetrating chitosan(CS) and polyethyleneimine(PEI).Benefiting from the confinement effect of the dual cross-linked structure,the HZO within HZO@CS-PEI exhibited an ultrasmall size of approximately 2.16 nm.The incorporation of PEI enhanced both phosphate sequestration efficiency and mechanical stability of the nanocomposite,improving its practical applicability.Ultrafine dispersion of HZO nanoparticles within the composite matrix achieved a saturable phosphate adsorption capacity exceeding 64.41 mg/g at 298 K.Crucially,selective phosphate adsorption by HZO@CS-PEI remained effective in water containing high concentrations of coexisting anions and organic matter.The synergistic application of spectroscopic analyses and density functional theory(DFT) calculations revealed three distinct interaction mechanisms between HZO@CS-PEI and phosphate:inner-sphere complexation,hydrogen bonding,and electrostatic interactions.Furthermore,the used HZO@CS-PEI could be effectively regenerated with 0.1 mol/L NaOH for repeat use.In the column adsorption tests,phosphate-contaminated water was successfully treated by HZO@CS-PEI column over 2750 bed volumes(BV),confirming operational stability under dynamic flow conditions. 展开更多
关键词 Phosphate sequestration Hydrated Zr(IV)oxide(HZO) Nanocomposite Ultrasmall nanoparticles
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Integrated theory and technology for carbon sequestration and resource utilization via flue gas injection into coal mine goafs 认领 引用
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作者 Wenhao Deng Sichen Liu +4 位作者 Xuefeng Wang Chaoyu Hao Yansheng Wang Wenhao He Zhixin Jin 《International Journal of Coal Science & Technology》 SCIE EI CAS CSCD 2026年第2期237-256,共20页
Coal is crucial to China’s economic and social development.The two primary factors hindering the high-quality development of China’s coal industry are safety and emissions.Methane and coal spontaneous combustion hav... Coal is crucial to China’s economic and social development.The two primary factors hindering the high-quality development of China’s coal industry are safety and emissions.Methane and coal spontaneous combustion have long posed major safety risks.Competitive adsorption experiments with coal and rock samples exposed to single-component and multi-component flue gases revealed that a mixture of N2,CO2,SO2,and NOX is optimal for oxygen isolation,fire prevention,and gas displacement.Thermodynamic studies further identified the ideal fire prevention formula as 79%N2,8%–20%CO2,0.0006%–0.001%SO2,and 0.001%–0.0018% NOX.Molecular simulations and quantum chemical analyses showed that coal and rock exhibit stronger interactions with CO2 than with N2,CH4,or O2,enabling CO2 to preferentially occupy adsorption sites and displace O2 and CH4.These findings explain the mechanisms behind oxygen isolation,fire prevention,and gas displacement and highlight the strong affinity of coal’s functional groups for CO2,which contributes to carbon sequestration.Adsorption experiments on over 280 coal and 130 rock samples from 11 provinces found that each ton of coal can sequester 7–11 kg of CO2,while each ton of mudstone adsorbs 6–8 kg.Coal-rock in goaf areas exhibits even greater sequestration capacity.Three key technological breakthroughs were made:(1)flue gas injection technology for fire prevention and gas displacement,(2)high-reliability multi-phase flue gas transport technology,and(3)a safety assurance and intelligent control system for gas injection.In 2023,these technologies were successfully applied in a National Energy Group project,reducing CO2 concentration from 10%to 18%to below 0.01%in return air,achieving an annual sequestration capacity of 12,800 tons of CO2 per unit. 展开更多
关键词 Power plants flue gas Coal mine goaf Fire prevention and gas displacement Carbon dioxide sequestration Multiphase flue gas transport technology
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How different thinning can improve carbon sequestration,carbon stock and mechanical stability in peri-urban mixed forest stands:a study case in Mediterranean environment 认领 引用
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作者 Ugo Chiavetta Paolo Cantiani 《Journal of Forestry Research》 SCIE EI CAS CSCD 2026年第1期138-151,共14页
Peri-urban plantations in the Mediterranean are often degraded due to human inactivity and climate change,leading to a loss of ecosystem services and biodiversity.This study investigates the impact of different thinni... Peri-urban plantations in the Mediterranean are often degraded due to human inactivity and climate change,leading to a loss of ecosystem services and biodiversity.This study investigates the impact of different thinning practices on carbon sequestration and tree stability in a degraded periurban plantation in the Italian Apennines,six years after thinning.Three treatments were compared:(a)moderate thinning from below(-25%biomass),representing the typical practice;(b)intense selective thinning(-35%biomass),representing an innovative approach;and(c)no management as the control.Growth projections were used to estimate carbon recovery for these treatments,based on site-specific models calibrated with real data.The results show that both thinning approaches increased carbon sequestration over time,with the innovative thinning achieving a 7%higher annual carbon sequestration rate than traditional thinning and 8%more than the control.Estimated payback times were9 years for recovering the harvested volume in both thinning approaches,10 years for innovative thinning to surpass traditional thinning,17 years for innovative thinning to surpass the control,and 24 years for traditional thinning to surpass the control.Additionally,tree mechanical stability improved significantly in both thinning treatments after two years,with further increases observed in the innovative thinning group after six years.These results suggest that selective thinning can accelerate forest recovery and carbon sequestration,especially in areas with high stem density,where it can reduce the negative impacts of tree mortality and deadwood accumulation.However,careful planning is required to mitigate potential short-term stability is sues,particularly in challenging environments(e.g.,windy conditions,steep slopes).Forest management strategies should therefore aim to balance growth,carbon storage,and tree stability,considering both long-term sustainability and local environmental conditions.The findings are particularly relevant for current climate change mitigation strategies,emphasizing that thinning should be carefully tailored to forest type and conditions to maximize benefits in carbon credit generation and sustainable forest management practices. 展开更多
关键词 Peri-urban plantations Carbon sequestration Thinning Payback time Tree mechanical stability
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Effects of electrical conductivity,acidity,and organic matter on carbon sequestration ability of soils beneath Amygdalus scoparia and Ephedra procera 认领 引用
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作者 Zahra KARIMPOUR Hossein SADEGHI 《中国水土保持科学（中英文）》 CSCD 北大核心 2026年第2期258-268,共11页
[Objective]Carbon sequestration in plants and soils plays a crucial role in the carbon cycle,contributing to the reduction of carbon dioxide levels and enhancing soil productivity.Identifying plant species with high c... [Objective]Carbon sequestration in plants and soils plays a crucial role in the carbon cycle,contributing to the reduction of carbon dioxide levels and enhancing soil productivity.Identifying plant species with high carbon sequestration potential is essential for the restoration and maintenance of rangelands.[Methods]This study examined carbon sequestration in various plant organs—roots,stems,and leaves—of two plant species:wild almond(Amygdalus scoparia)and Ephedra(Ephedra procera).In addition,soil characteristics and carbon sequestration levels were assessed by collecting soil samples from depths of 0-15 cm and 15-30 cm,both at the base of plants and in the inter-plant spaces.In this study,the first experiment comprised two factors:plant species(A.scoparia and E.procera)and plant organs(leaves,stems,and roots).The second experiment also had two factors.The first factor was three types of soil masses(collected at the bases of A.scoparia,E.procera,and the control),and the second factor was soil sampling depth(0-15 cm and 15-30 cm).The study was conducted in the Dolatabad region of Fars Province,Iran.[Results]Soil beneath A.scoparia had higher levels of organic carbon,organic matter,and carbon sequestration than E.procera and control soils.Furthermore,the 0-15 cm depth showed greater levels of these factors than the 15-30 cm depth.As soil depth increased,organic carbon,organic matter,and carbon sequestration decreased,while soil acidity increased.However,soil moisture content did not significantly vary between the two depths.Soil type and depth had significant effects on electrical conductivity.The control soil exhibited a significantly higher electrical conductivity than E.procera and A.scoparia soils.Additionally,average values indicated that electrical conductivity was significantly greater at the soil surface.Notably,both depths of the control soil showed the highest conductivity among all treatments,with the control differing significantly from the other groups.High electrical conductivity in the soil may indicate high salinity levels.Soils beneath A.scoparia and E.procera showed significant differences in clay content between the two soil depths,with the 0-15 cm depth exhibiting the highest clay content among all treatments.[Conclusions]A.scoparia is found to store significantly higher amounts of organic carbon and organic matter in its tissues than E.procera.The cultivation of A.scoparia is highly feasible due to its high tolerance to drought,whereas other water-dependent species may require extensive management if cultivated in vast areas of rangelands.Organic carbon plays a more significant role than organic matter in determining the extent of carbon sequestration in the soil.Soil texture,particularly clay content,emerges as one of the most influential factors in carbon sequestration. 展开更多
关键词 carbon sequestration organic carbon soil texture environmental management
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Geological structure controls CO2 hydrate sequestration in seafloor sediments:A numerical simulation study of anticline,syncline,and inclined reservoirs 认领 引用
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作者 Shu-xia Li Zhong-xue Song +6 位作者 Yang Guo Gao-wei Hu Lu Liu Hao Sun Ben-kui Lou Jun-hao Liu Zhen-hao Ren 《China Geology》 CAS CSCD 2026年第3期635-651,共17页
Sequestration of CO2 as hydrates in seafloor sediments is an effective method for reducing CO2 emissions.However,the efficiency of CO2 hydrate sequestration can be influenced by the geological structure of se... Sequestration of CO2 as hydrates in seafloor sediments is an effective method for reducing CO2 emissions.However,the efficiency of CO2 hydrate sequestration can be influenced by the geological structure of seafloor reservoirs.To address this,the authors numerically investigate the effects of four reservoir structures(horizontal,inclined,anticline,and syncline)and dip angle on CO2 hydrate formation mass and sequestration security.The results show that different geological structures alter the temperature distribution within the reservoir,thereby modifying the stability zone of CO2 hydrates.At a dip angle of 30°,the hydrate formation mass(Fhyd)in the inclined,anticline,and syncline structures changes by-19.12%,+6.60%,and-7.19%,respectively,relative to the horizontal structure(baseline:342×10~6 kg).The distance from the top of the CO2 hydrate cap to the seafloor mudline(DH),a key security indicator,varies significantly:Compared to 25 m in the horizontal structure,DH changes by+160%,-20%,and+20%for the inclined,anticline,and syncline structures,respectively.As the dip angle increases,Fhyd in the anticline structure increases while DH decreases.In contrast,Fhyd decreases and DH increases in both the inclined and syncline structures.The temperature variation across structures is a key factor influencing Fhyd,while permeability is a major factor affecting the safety of CO2 sequestration.Therefore,if Fhyd is the sequestration objective,the anticline structure is the optimal reservoir.If DH is the objective,the inclined structure is the best reservoir.These findings provide critical insights for site selection in marine CO2 hydrate sequestration projects. 展开更多
关键词 CO2hydrate sequestration Geological structures Horizontal+inclined+anticline+syncline Numerical simulation Structural dip angle Phase Equilibrium zone Sequestration capacity Sequestration safety Carbon neutrality CCS
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Effect of reservoir goaf on methane recovery and carbon dioxide sequestration in sandy and clayey hydrate reservoirs:An experimental study 认领 引用
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作者 Yun-shuang Zeng Dong-bin Pan +2 位作者 Chen Chen Yu Xie Yang Zhou 《China Geology》 CAS CSCD 2026年第3期624-634,共11页
Carbon dioxide(CO2)replacement is a promising technique for extracting natural gas hydrate(NGH,a promising clean energy source),capable of promoting energy development while mitigating the greenhouse effect.However... Carbon dioxide(CO2)replacement is a promising technique for extracting natural gas hydrate(NGH,a promising clean energy source),capable of promoting energy development while mitigating the greenhouse effect.However,the improvement of NGH extraction efficiency in field engineering is hindered by the difficulty of CO2 injection and diffusion.To overcome these difficulties,this study proposes combining CO2 replacement with the solid fluidization method for the exploitation of NGH.The effects of solid fluidization mining goaf on methane(CH4)recovery and CO2 sequestration were experimentally investigated.The results indicate that the presence of a goaf in a sandy hydrate reservoir improves the CH4 recovery ratio and CO2 storage capacity due to its ability to provide a higher replacement driving force.However,the CO2 sequestration ratio in the goaf-containing reservoir is lower than that in the intact hydrate reservoir due to the influence of free water content.Besides increasing the replacement driving force,the goaf in the clayey hydrate reservoir can also enhance the diffusion of the replacement medium.The enhancement of CH4 recovery and CO2 storage amount per unit sediment volume is 5.3%and 22.8%,respectively.Moreover,the CO2 sequestration ratio in the goaf-containing hydrate reservoir is higher than that in the intact hydrate reservoir.These results provide theoretical support for the extraction of NGH via the CO2 replacement method. 展开更多
关键词 Natural gas hydrate Combustible ice Clean energy CO2sequestration Hydrate exploitation Reservoir goaf Solid fluidization Carbon sequestration Carbon capture,utilization,and storage(CCUS)
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CO2 sequestration performance and microstructural response of a novel modified magnesium-coal-based all-solid waste backfill material 认领 引用 被引量：1
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作者 Hua Tao Shuangming Wang +3 位作者 Junping Cui Qifeng Jia Wei Guo Hehu Zheng 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第7期2271-2283,共13页
The synergistic CO2 sequestration via solid waste backfilling in goafs can simultaneously address the issues of CO2 emissions,accumulation of coal-based solid wastes,and safety hazards in goafs under China's... The synergistic CO2 sequestration via solid waste backfilling in goafs can simultaneously address the issues of CO2 emissions,accumulation of coal-based solid wastes,and safety hazards in goafs under China's coal-dominated energy structure.In this study,a modified magnesium-coal-based all-solid-waste carbon-sequestering backfill material(MFCC,prepared from modified magnesium slag(MMS),fly ash(FA),coal gangue(CG),and coal gasification slag(CGS))was fabricated.The fluidity of the fresh slurry was characterized using the mini slump test,and its carbonation curing performance was investigated via uniaxial compressive strength(UCS),carbonation depth(CD),X-ray diffraction(XRD),scanning electron microscopy(SEM),thermogravimetrydifferential thermogravimetry(TGDTG),and computed tomography(CT)tests,aiming to achieve the synergistic goals of high-value utilization of solid wastes and CO2 sequestration.The results indicate that the fresh MFCC sluny exhibits excellent fluidity with a mini slump ranging from 121.5 to 135 mm.The fluidity increases with the rise in CGS content,which fully meets the requirements for industrial pipeline pumping.During the carbonation curing process,the UCS of the material increases continuously with the extension of curing age,with the 28-d UCS ranging from 7.36 to 8.71 MPa,which fully meets the strength design requirements for coal mine backfilling engineering.Microscopic analyses reveal that the filling and cementation effects of hydration and carbonation products on pores render the material's microstructure denser,significantly reducing pore volume and connectivity,which is the key reason for the strength improvement.After 28 d of carbonation curing,when the CGS content is 20wt%,the UCS reaches a maximum value of 8.71 MPa,and the CO2 uptake also attains a peak of 13.94%.In summary,after carbonation curing,the MFCC material not only exhibits excellent mechanical properties but also enables the simultaneous realization of resource utilization of solid wastes and efficient CO2 sequestration thus holding broad application prospects in backfilling engineering. 展开更多
关键词 solid waste backfill material carbonation curing compressive strength microstructure CO2sequestration
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Impact of dissolution and precipitation on pore structure in CO2sequestration within tight sandstone reservoirs 认领 引用 被引量：4
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作者 Hui Gao Kai-Qing Luo +6 位作者 Chen Wang Teng Li Zhi-Lin Cheng Liang-Bin Dou Kai Zhao Nan Zhang Yue-Liang Liu 《Petroleum Science》 SCIE EI CAS CSCD 2025年第2期868-883,共16页
Complex physical and chemical reactions during CO2sequestration alter the microscopic pore structure of geological formations,impacting sequestration stability.To investigate CO2sequestration dynamics,comprehens... Complex physical and chemical reactions during CO2sequestration alter the microscopic pore structure of geological formations,impacting sequestration stability.To investigate CO2sequestration dynamics,comprehensive physical simulation experiments were conducted under varied pressures,coupled with assessments of changes in mineral composition,ion concentrations,pore morphology,permeability,and sequestration capacity before and after experimentation.Simultaneously,a method using NMR T2spectra changes to measure pore volume shift and estimate CO2sequestration is introduced.It quantifies CO2needed for mineralization of soluble minerals.However,when CO2dissolves in crude oil,the precipitation of asphaltene compounds impairs both seepage and storage capacities.Notably,the impact of dissolution and precipitation is closely associated with storage pressure,with a particularly pronounced influence on smaller pores.As pressure levels rise,the magnitude of pore alterations progressively increases.At a pressure threshold of 25 MPa,the rate of change in small pores due to dissolution reaches a maximum of 39.14%,while precipitation results in a change rate of-58.05%for small pores.The observed formation of dissolution pores and micro-cracks during dissolution,coupled with asphaltene precipitation,provides crucial insights for establishing CO2sequestration parameters and optimizing strategies in low permeability reservoirs. 展开更多
关键词 Dissolution Precipitation Pore structure CO2sequestration Unconventional reservoirs
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Carbon sequestration potential and mechanisms of shotcrete for tunnel support in underground metal mines through cement hydration 认领 引用 被引量：3
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作者 Qiusong Chen Chao Zhang +2 位作者 Daolin Wang Yikai Liu Chongchong Qi 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2025年第7期1496-1506,共11页
Growing concerns about greenhouse gas emissions from underground mining have intensified the need for carbon reduction strategies at every stage.Shotcrete used in tunnel support presents a promising opportunity for ca... Growing concerns about greenhouse gas emissions from underground mining have intensified the need for carbon reduction strategies at every stage.Shotcrete used in tunnel support presents a promising opportunity for carbon emission reduction.This study investigates the carbon absorption capacity,mechanical strength,and underlying mechanisms of shotcrete when exposed to varying CO2concentrations during the mine support process.Findings reveal that higher CO2concentrations during the initial stages of carbonation curing enhance early strength but may impede long-term strength development.Shotcrete samples exposed to 2vol%CO2for 14 d exhibited a carbonation degree approximately three times higher than those exposed to 0.03vol%CO2.A carbonation layer formed in the shotcrete,sequestering CO2as solid carbonates.In practical terms,shotcrete in an underground return-air tunnel absorbed 1.1 kg·m2of CO2over 14 d,equivalent to treating 33 m3of contaminated air.Thus,using shotcrete for CO2curing in return-air tunnels can significantly reduce carbon emissions,contributing to greener and more sustainable mining practices. 展开更多
关键词 green mine shotcrete support carbon sequestration carbon absorption cement hydration
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