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XTE J1814-338 as a Strange Star Admixed with Bosonic Dark Matter 认领 引用
1
作者 Shuhua Yang Fridolin Weber 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第2期362-366,共5页
We show that the compact star XTE J1814-338 can be explained as a strange star admixed with self-interacting bosonic dark matter(BDM),provided the dark matter fraction exceeds approximately 70%.This interpretation lea... We show that the compact star XTE J1814-338 can be explained as a strange star admixed with self-interacting bosonic dark matter(BDM),provided the dark matter fraction exceeds approximately 70%.This interpretation leads to a robust constraint on the BDM particle mass:mχ■307(λ/π)1/4MeV(λ is the dimensionless coupling constant of the BDM).The result is independent of formation scenario and microphysical details and is falsifiable by future NICER and LIGO/Virgo observations. 展开更多
关键词 strange star mass constraint bosonic dark matter robust constraint compact star observability dark matter bdm provided dark matter
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Ultrafast Condensed Matter Physics at the Horizon 认领 引用
2
作者 Jimin Zhao 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第3期205-206,共2页
Ultrafast optical spectroscopy was successfully introduced decades ago.Its deep relationship with condensed matter physics profoundly enriched the scientific frontier of light–matter interactions.Previously,materials... Ultrafast optical spectroscopy was successfully introduced decades ago.Its deep relationship with condensed matter physics profoundly enriched the scientific frontier of light–matter interactions.Previously,materials such as metals,insulators,semiconductors,and superconductors were investigated,followed by magnetic materials,strongly correlated materials,complex oxides,nano-materials,topological materials,and metamaterials. 展开更多
关键词 metals ultrafast optical spectroscopy magnetic materialsstrongly condensed matter physics insulators semiconductors ultrafast condensed matter physics light matter interactions
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The photo-release of dissolved organic matter from soil-derived sources:An insight into the impact of acid mine drainage 认领 引用
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作者 Lezhang Wei Fangqing Li +6 位作者 Yu Liu Qihang Wu Chengjun Zhang Xuexia Huang Dinggui Luo Juan Liu Tangfu Xiao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第4期322-331,共10页
Particulate organic matter(POM) serves as a significant photo-induced source of dissolved organic matter(DOM),which plays a critical role in the biogeochemical behavior of potentially toxic elements in rivers affected... Particulate organic matter(POM) serves as a significant photo-induced source of dissolved organic matter(DOM),which plays a critical role in the biogeochemical behavior of potentially toxic elements in rivers affected by acid mine drainage(AMD). However, the photochemical reactions of POM in AMD have been underexplored. This study provides insights into the influence of AMD on the photo-release of DOM from soil-derived POM under simulated irradiation conditions. The spectroscopic and molecular composition of DOM was characterized and water quality parameters such as total organic carbon(TOC) and the concentrations of Fe(Ⅱ) and Fe(Ⅲ) was quantified in the experimental solutions with varying ratios of AMD addition(i.e., 0 %, 0.0 %, 0.05 %, 0.1 %, 0.5 %, 1 %AMD). The results indicate that photoirradiation caused an increase in carbon loss from POM in the solutions through the processes of photo-dissolution and photodegradation. Initially, a larger fraction of tyrosine-like, saturated compounds predominated the DOM components in the solutions, which were subsequently replaced by lignin-like classes after 12 h of photoirradiation. The addition of AMD significantly enhanced the photochemical reactions, resulting in a shift in DOM toward more aromatic molecules, as characterized by higher ratios of O/C,aromaticity index(AImod), double bond equivalents(DBE), and nominal oxidation state of carbon(NOSC), alongside lower H/C values. Although the addition of AMD markedly increased the photodegradation of lignins and tannins, our findings suggest that the photochemical reactions of dissolution and degradation generated DOM that diverged from well-documented results during a singular process of DOM photodegradation, which typically indicates that humic-like components are preferentially lost and that the newly leached DOM contains a significant proportion of aliphatic compounds. Additionally, our results demonstrated that the mineralization of POM-derived DOM was associated with the photoreduction of Fe(Ⅲ), as evidenced by elevated levels of Fe(Ⅱ)(eightfold increase following photoirradiation in the 1 % AMD treatment group) and diminished concentrations of dissolved organic carbon(DOC)(4.65 mg/L and 3.74 mg/L in the 0 % AMD and 1 % AMD treatment groups,respectively) in the AMD-rich solutions. This investigation contributes to a deeper understanding of the phototransformation of POM and DOM during instream transport and the biogeochemical processes of key elements in rivers impacted by AMD. 展开更多
关键词 Acid mine drainage Photochemical reaction Potentially toxic elements Particulate organic matter Dissolved organic matter photodegradation
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Soil organic matter revisited:Why humic substances still matter? 认领 引用
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作者 Sen DOU Yifeng ZHANG +4 位作者 Jun SHAN Meng WU Rui MA Song GUAN Zhongjun JIA 《Pedosphere》 SCIE CAS CSCD 2026年第1期6-11,共6页
Soil organic matter(SOM)is crucial for ecosystem carbon cycling,soil fertility,and environmental quality.As the main component of SOM,humic substances(HS)are considered a unique category of nonuniformly assembled subs... Soil organic matter(SOM)is crucial for ecosystem carbon cycling,soil fertility,and environmental quality.As the main component of SOM,humic substances(HS)are considered a unique category of nonuniformly assembled substances. 展开更多
关键词 environmental quality soil organic matter som somhumic substances hs carbon cyclingsoil humic substances soil organic matter soil fertility ecosystem carbon cycling
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Particulate matter generated from electrolysis processes:a review of pollution,formation,and control technologies 认领 引用
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作者 Zizhen Ma Lingyu Li +10 位作者 Qingyuan Hao Linhua Jiang Ning Duan Fuyuan Xu Lei Duan Jingkun Jiang Yanhui Wang Yan Tan Huawei Zhang Ting Liu Jianguo Deng 《ENGINEERING Environment》 SCIE EI CAS CSCD 2026年第4期155-171,共17页
The rupture of electrolysis bubbles at the gas-liquid interface generates electrolytic particulate matter(EPM).EPM poses a threat to both occupational health and ambient air quality.Understanding EPM pollution charact... The rupture of electrolysis bubbles at the gas-liquid interface generates electrolytic particulate matter(EPM).EPM poses a threat to both occupational health and ambient air quality.Understanding EPM pollution characteristics and developing effective control strategies are therefore critical for the green development of the electrolysis industry.This review summarizes research on EPM regarding workplace contamination,atmospheric emissions,formation mechanisms,and control technologies.Findings reveal severe contamination of electrolysis facilities by EPM,acid mist,and heavy metals,which collectively pose high cancer and non-cancer risks—even when individual component concentrations fall below exposure limits.However,industrial EPM emission levels remain poorly quantified,partly due to a lack of convenient and accurate measurement methods.Bubble characteristics,electrolyte properties,and electrode materials along with their physical characteristics significantly affect EPM formation.Based on the formation process and influencing factors,we summarize theoretical source reduction pathways,including:inhibiting electrochemical gas generation,reducing detached bubble size,and deploying physical barriers.Existing source control methods,while demonstrating high removal efficiency,often adversely affect energy consumption,product quality,or productivity.Finally,we identify key research gaps and propose future directions for characterizing EPM and developing targeted source reduction technologies. 展开更多
关键词 Electrolysis Particulate matter Generation mechanism Pollution characteristics Controlling methods
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Pyrolysis temperature-dependent variations in spectral and molecular characteristics of water-and alkali-extractable organic matter derived from biochar produced by municipal sludge 认领 引用
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作者 Jun Cao Hao Zhang +4 位作者 Ji-peng Sun Xin Wang Tao Liang Yi-chao Wang Hua-lun Zhu 《Water Science and Engineering》 EI CAS CSCD 2026年第2期211-222,共12页
Biochar-derived dissolved organic matter(BDOM)plays a crucial role in environmental processes.This study investigated the characteristics of water-extractable organic matter(WEOM)and alkali-extractable organic matter(... Biochar-derived dissolved organic matter(BDOM)plays a crucial role in environmental processes.This study investigated the characteristics of water-extractable organic matter(WEOM)and alkali-extractable organic matter(AEOM)from sludge-derived biochar produced across different pyrolysis temperatures,combining spectroscopic analysis with Fourier-transform ion cyclotron resonance mass spectrometry(FT-ICR MS).Dissolved organic carbon(DOC)concentrations in WEOM and AEOM declined significantly(from 5.72 mg/g to 1.95 mg/g and from 5.93 mg/g to 2.36 mg/g,respectively)with increases in temperature from 400℃to 500℃before increasing again at 600℃.AEOM generally exhibited higher DOC concentrations than WEOM.Three fluorescent components were identified:a humic-like component C1 with two peaks(one at an excitation wavelength(λEx)of 230 nm and an emission wavelength(λEm)of 400 nm and the other atλEx=310 nm andλEm=400 nm),an ultraviolet C(UVC)humic-like component C2 with a single peak(λEx=260 nm andλEm=460 nm),and a protein-like component C3 with two peaks(one atλEx=220 nm andλEm=290 nm and the other atλEx=285 nm andλEm=290 nm).AEOM was predominantly composed of polycyclic aromatic compounds,aromatic formulas,lignin,and nitrogen-containing aliphatic compounds,which altogether accounted for more than 75%of its composition.With increasing pyrolysis temperature,the relative abundance of most aromatic structures decreased,while N-aliphatic compounds became more prominent.The humification degree and molecular weight of BDOM increased with temperature rises to 500℃−550℃and then declined,with protein-like C3 peaking within this temperature range.FT-ICR MS revealed a significant reduction in lignin content at 550℃.These results indicate that 500℃−550℃represents a key inflection point in dissolved organic matter(DOM)transformation and an optimal pyrolysis range for producing environmentally favorable biochar. 展开更多
关键词 Dissolved organic matter Sludge-based biochar Residence time EEM-PARAFAC FT-ICR MS
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Particulate matter exposure negatively affects the cancer immunosurveillance through PD-L1 upregulation and dendritic cell maturation suppression 认领 引用
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作者 Aussara Panya Yupanun Wutti-in +6 位作者 Chutamas Thepmalee Nuttipon Yabueng Somporn Chantara Chidchamai Kewcharoenwong Ganjana Lertmemongkolchai Preeyanat Vongchan Phennapha Klangsinsirikul 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期584-595,共12页
The relationship between particulate matter(PM)pollution exposure and lung cancer incidence has been well established.However,the association between PM exposure and immunosurveillance,which indirectly controls tumor ... The relationship between particulate matter(PM)pollution exposure and lung cancer incidence has been well established.However,the association between PM exposure and immunosurveillance,which indirectly controls tumor growth and progression,remains limited.In this study,we investigated the effect of urban particulate matter(UPM)on modulating the cancer microenvironment,particularly its impact on immunosurveillance functions.Exposure of non-small cell lung cancer(NSCLC)cell lines,A549 and NCI-H1975,to UPM induced the expression of the immune checkpoint molecule programmed cell death ligand 1(PD-L1)in a dose-dependent manner.Additionally,UPM exposure upregulated the mRNA expression of transforming growth factor-beta(TGF-β),an immunosuppressive cytokine.The alteration in the cytokine profile upon UPM exposure impaired dendritic cell maturation,as evidenced by the retention of the CD14 monocyte marker after monocytes were exposed to UPM-treated cancer cell supernatant during the maturation process.Autologous T cells activated by UPM-treated dendritic cells exhibited reduced anti-tumor activity compared to those activated by untreated dendritic cells.This was demonstrated by the lower cancer cell death observed in cancer-T cell co-culture assays.However,there were no significant changes in immune cell populations,including CD4+T lymphocytes,CD8+T lymphocytes,and CD3-negative cells,between the UPM-treated dendritic cell group and the conventional dendritic cell group.This suggests that UPM affects immune function primarily in terms of quality rather than quantity.In conclusion,our findings indicate that PM exposure promotes cancer progression by altering the tumor microenvironment and impairing immunosurveillance function. 展开更多
关键词 Particulate matter(PM) Cancer Lung cancer Immunosurveillance PD-L1
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Mechanism of biochar decomposition mediated by bacteria shifts the molecular structure of soil organic matter to high-molecular-mass aromatic components 认领 引用
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作者 Xu CHEN Xiaozeng HAN +2 位作者 Wenxiu ZOU Jun YAN Xinchun LU 《Pedosphere》 SCIE CAS CSCD 2026年第2期460-473,共14页
The interaction between biochar amendments and soil dissolved organic matter(DOM)is crucial for soil health and carbon(C)sequestration,yet the molecular mechanisms underlying these effects are not fully understood.Thi... The interaction between biochar amendments and soil dissolved organic matter(DOM)is crucial for soil health and carbon(C)sequestration,yet the molecular mechanisms underlying these effects are not fully understood.This study employed ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry to comprehensively assess the influence of biochar on the chemodiversity of DOM at a molecular level,with a particular focus on the interactions between bacterial species and DOM molecules.A five-year field experiment was conducted,involving four treatments,no fertilization(NF),conventional fertilization(CF),conventional fertilization with low-rate biochar at 15000 kg ha-1(LB),and conventional fertilization with high-rate biochar at 60000 kg ha-1(HB).Biochar amendment,while increasing soil pH and nutrient contents,stimulated bacterial diversity and abundance,particularly at the higher application rate.Specifically,bacterial abundance increased by 58.0%,130.9%,and 272.8% in CF,LB,and HB treatments,respectively,compared to NF,while bacterial diversity was also notably lower in both NF and CF than in HB.Furthermore,biochar amendment lowered the chemodiversity and thermodynamic stability of DOM by shifting its composition toward more aromatic molecules that contain more C,less C saturation,and higher molecular mass,ultimately increasing the retention of DOM.Further analysis of the molecular composition of DOM indicated that the overall increase in molecular mass was primarily due to increases in high-molecular-mass C-hydrogen(H)-oxygen(O)-nitrogen(N)and CHO compounds.Keystone bacterial taxa in the biochar-amended co-occurrence networks were also the most closely connected with the CHO and CHON compounds.These compounds exhibited similar,narrow O/C and H/C ratios within the high-molecular-mass range,and their positive correlations were approximately twice as strong as the negative correlations.These results together suggest that biochar amendment leads to the homogenization of the DOM pool,with its molecular characteristics being shaped more by bacterial contributions than by their consumption. 展开更多
关键词 bacterial community biodiversity chemodiversity dissolved organic matter soil amendment soil microbiome
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Hydrophobic neutral dissolved organic matter:First insights into compositional changes and formation of disinfection by-products induced by rainfall and degradation 认领 引用
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作者 Hang Vo-Minh Nguyen Hye-bin Lim +1 位作者 Jin Hur Hyun-Sang Shin 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第3期307-319,共13页
This study examined the structural characteristics of dissolved organic matter(DOM)in bulk river samples and their fractionations(isolated using SupeliteT MDAX-8 resin)under rainfall conditions,as well as two primary ... This study examined the structural characteristics of dissolved organic matter(DOM)in bulk river samples and their fractionations(isolated using SupeliteT MDAX-8 resin)under rainfall conditions,as well as two primary degradation processes:biodegradation and photodegradation.Compared to bulk samples,DAX-8 resin fractionations provided more detailed insights into structural changes in DOM influenced by rainfall and subsequent degradation.Rainfall was found to increase the proportions of hydrophilic(Hi)and hydrophobic-neutral(HoN)fractions.Notably,this study is the first to confirm that HoN consistently exhibits lower specific ultraviolet absorbance,humification index,fulvic-and humic-like compounds,and smaller molecular sizes of humic substances(1–20 kDa)across all conditions.Disinfection by-product(DBP)experiments showed that HoN primarily contained precursors for trihalomethane formation,while the formation of haloacetic acids and haloacetonitrile was closely related to Hi and hydrophobic acid fractions.Principal component analysis revealed that HoN was associated with elevated levels of tyrosine and tryptophan,as well as organic compounds in the 300–500 Da range,which contributed more significantly to trihalomethane formation than to haloacetic acids and haloacetonitriles.Although the characteristics of the DAX fractions were distinct,there were minimal differences between rainfall and subsequent biodegradation or photodegradation.This study is the first to characterize HoN and its role in the formation of DBP.As HoN became the dominant fraction after degradation processes,these findings provide important insights into water management and supply practices. 展开更多
关键词 Biodegradation Dissolved organic matter Fluorescence Hydrophobic neutral Photodegradation Rainfall
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Associations of indoor airborne microbiome with systemic inflammation in the context of indoor particulate matter pollution and the metabolic mechanisms 认领 引用
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作者 Yetong Zhao Luyi Li +8 位作者 Wenlou Zhang Shan Liu Wanzhou Wang Xuezhao Ji Di Yang Lifang Zhao Zhihong Zhang Xinbiao Guo Furong Deng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第1期187-198,共12页
Microorganisms constitute an essential component in the indoor environment,which is closely related to hu-man health.However,there is limited evidence regarding the associations between indoor airborne microbiome and ... Microorganisms constitute an essential component in the indoor environment,which is closely related to hu-man health.However,there is limited evidence regarding the associations between indoor airborne microbiome and systemic inflammation,as well as whether this association is modified by indoor particulate matter and the underlying mechanisms.In this prospective repeated-measure study among 66 participants,indoor airborne mi-crobiome was characterized using amplicon sequencing and qPCR.Indoor fine particulate matter(PM2.5)and inhalable particulate matter(PM10)were measured.Systemic inflammatory biomarkers were assessed,including white blood cell(WBC),neutrophil(NEUT),monocyte,eosinophil counts,and their proportions.Targeted serum amino acid metabolomics were conducted to explore the underlying mechanisms.Linear mixed-effect models re-vealed that bacterial and fungal Simpson diversity were significantly associated with decreased WBC and NEUT.For example,for each interquartile range increase in the bacterial Simpson diversity,WBC and NEUT changed by-4.53%(95%CI:-8.25%,-0.66%)and-5.95%(95%CI:-11.3%,-0.27%),respectively.Notably,increased inflammatory risks of airborne microbial exposure were observed when indoor PM2.5 and PM10 levels were below the WHO air quality guidelines.Mediation analyses indicated that dopamine metabolism partially mediated the anti-inflammatory effects of fungal diversity exposure.Overall,our study indicated protection from a diverse indoor microbial environment on cardiovascular health and proposed an underlying mechanism through amino acid metabolism.Additionally,health risks associated with microbial exposure deserve more attention in con-texts of low indoor particulate matter pollution.Further research is necessary to fully disentangle the complex relationships between indoor microbiome,air pollutants,and human health. 展开更多
关键词 Indoor air Bioaerosols Microbiome Particulate matter Systemic inflammation Amino acid metabolism
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Palaeoenvironmental Evolution During the Darriwilian Age in the Lower Yangtze Region(South China)and its Controls on Enrichment of Organic Matter 认领 引用
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作者 Chaogang Fang Mu Liu +4 位作者 Chengcheng Zhang Haibo Huang Fengjie Li Tong Wu Bo Liu 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2026年第2期474-491,共18页
The Darriwilian Age,marked by the Great Ordovician Biodiversification Event(GOBE),represents a key interval of global environmental change and widespread organic-rich sedimentation.However,the nature of contemporaneou... The Darriwilian Age,marked by the Great Ordovician Biodiversification Event(GOBE),represents a key interval of global environmental change and widespread organic-rich sedimentation.However,the nature of contemporaneous climatic-oceanographic conditions and the mechanisms governing organic matter(OM)enrichment in South China remain poorly constrained.Here,we present an integrated petrological and geochemical investigation of organic-rich successions from the Ningkuo-Hulo formations in the AY1 core,Lower Yangtze region.Our results identify two distinct phases of OM accumulation.Phase I is characterized by relatively low total organic carbon(TOC)contents and developed under warm,humid climatic conditions,intensified chemical weathering,enhanced terrigenous input,weak upwelling and predominantly suboxic to oxic bottom waters,collectively limiting OM preservation.In contrast,Phase II records markedly higher TOC contents and corresponds to a transition toward cooler and drier climatic conditions,strengthened upwelling and the establishment of anoxic-euxinic bottom waters.These changes promoted nutrient recycling,enhanced primary productivity,reduced sediment dilution and more efficient OM preservation.This study systematically reveals two successive stages of climatic-oceanic evolution during the Darriwilian Age,providing new insights into the coupled evolution of palaeoclimate and palaeomarine processes in regulating organic carbon burial in South China. 展开更多
关键词 climatic-oceanographic evolution Ningkuo-Hulo formations organic matter enrichment redox conditions Darriwilian Age
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Selective transfer of organic matter in a mangrove ecosystem as implicated by amino acid carbon isotope ratios 认领 引用
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作者 Bingbing Wang Naican Hu +7 位作者 Jiachen Li Lai Wei Tengteng Wang Jiaze Li Zhuoran Li Jie Liu Tiantian Tang Hongmei Chen 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2026年第3期49-60,共12页
Subtropical mangroves are hot spots of blue carbon sequestration.As a dominant species of benthic fauna,crabs are an ecological engine of the mangrove ecosystem,which regulates the carbon transfer from primary produce... Subtropical mangroves are hot spots of blue carbon sequestration.As a dominant species of benthic fauna,crabs are an ecological engine of the mangrove ecosystem,which regulates the carbon transfer from primary producers to either sediment or to consumers of higher trophic levels.With the purpose to disentangle the mechanisms that shape carbon transfer in the mangrove ecosystem,we studied primary producers,sediments,suspended particles,and crabs in Zhangjiang Estuary Mangrove National Nature Reserve,China.Using the compound-specific isotope analysis of amino acids by gas chromatography-combustion-isotope ratio mass spectrometry,the stable carbon isotope values of amino acids were investigated from these mangrove samples.Broad isotope gradients of both amino acids and bulk organic carbon were observed in mangrove samples ranging from-30.0‰to-14.7‰and from-32.8‰to-15.6‰.In the sediment,heterogeneousδ13C distribution and elevated relative abundance of amino acids suggest the selective deposition of nitrogen-enriched organic matter from major primary producers and microalgae in suspended particles.Metabolic modifications of molecular isotope signatures in crabs was observed when comparing the amino acidδ13C values of crabs from different environments.Using a Bayesian mixing model,a mixed diet of mangrove crabs was quantified,which indicates a preferential ingestion of suspended particulate materials(SPM)(24%)and detrital organic matter in sediments(18%)as a replenishment of nitrogen,while mangrove and salt marsh leaves only account for 13%and 31%of the diet of crabs.This finding demonstrates the selective transfer of nitrogen-enriched organic matter in the mangrove ecosystem from primary production to major carbon reservoirs and dominant species of consumers,a process potentially regulating the efficiency of blue carbon sequestration in mangroves. 展开更多
关键词 mangroves blue carbon sequestration crabs amino acids organic matter compound specific isotope analysis
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Assessing the diurnal variations of total suspended matter under tidal forcing in bays and estuarine systems using GOCI data 认领 引用
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作者 Hao Li Xianqiang He +3 位作者 Yan Bai Palanisamy Shanmugam Xuchen Jin Fang Gong 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2026年第2期214-226,共13页
High concentrations of total suspended matter(TSM)with pronounced diurnal variations strongly affect aquatic processes and water quality in bays and estuarine systems of the East China Sea.Previous studies have mainly... High concentrations of total suspended matter(TSM)with pronounced diurnal variations strongly affect aquatic processes and water quality in bays and estuarine systems of the East China Sea.Previous studies have mainly examined TSM variations in summer,as wintertime GOCI observations suffer from high solar zenith angles and large data gaps.In this study,a neural network-based atmospheric correction model specifically designed for dawn and dusk conditions,combined with a regional TSM algorithm,was applied to generate,for the first time,reliable winter TSM products for Hangzhou Bay,Yueqing Bay,and Sanmen Bay.Validation with extensive in situ measurements demonstrated the robustness of the regional TSM algorithm.Results showed that,in winter,TSM concentrations were generally higher during spring tides than during neap tides,with peaks occurring within one hour of the tidal maximum,whereas during neap tides,peaks lagged 2–4 h behind.Site-specific differences were also observed:at Shengshan Station(in Hangzhou Bay),tidal inflows of clear seawater diluted suspended matter during spring tides,while in Sanmen Bay,strong tidal currents and shallow depths enhanced resuspension and produced TSM increases of up to 26-fold within five hours.In Yueqing Bay,tidal fluctuations caused nearly tenfold changes in TSM within a few hours.These findings highlight the effectiveness of the proposed method for retrieving GOCI products under high solar zenith angles in winter and provide new insights into the tidal modulation of TSM dynamics in turbid coastal waters. 展开更多
关键词 diurnal variations total suspended matter GOCI ocean color
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Characterization,sources,and driving factors of particulate matter(PM)pollution in a desert hinterland city:Insights from Hotan,China 认领 引用
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作者 Bei Jiang Yayi Cai +4 位作者 Yumo Shi Qilian Zhai Haibao Huang Long Peng Junlei Zhan 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第3期209-219,共11页
Atmospheric particulate matter(PM)pollution is severe in southern Xinjiang,especially near the Taklimakan Desert,where air quality is affected by both dust and anthropogenic emissions.This study employs explainable ma... Atmospheric particulate matter(PM)pollution is severe in southern Xinjiang,especially near the Taklimakan Desert,where air quality is affected by both dust and anthropogenic emissions.This study employs explainable machine learning in Hotan to identify distinct mechanisms underlying haze and dust events.Results confirm severe PM pollution in Hotan.Annual mean PM10and PM2.5reached 327.39 and 102.02μg/m3,respectively.Dust events originated mainly from the central desert,while haze was dominated by local and nearby sources.Emission contributions averaged 405.84μg/m3for PM10and 114.56μg/m3for PM2.5annually.Meteorological stagnation increased PM10and PM2.5by 138.37 and 44.51μg/m3,respectively,and transport added another 138.04 and43.20μg/m3.The mechanisms showed significant diurnal and seasonal differences.Diurnal analysis revealed that haze pollution exhibits a double-peak pattern linked to stable stratification under high surface pressure(SP),whereas dust pollution shows irregular peaks driven by afternoon wind resuspension.Seasonal analysis revealed that haze-season PM was driven by high NO2and low solar radiation(SSR),reflecting precursor accumulation and stagnant weather,with transport contributions from regional pollution convergence via air mass history.Dust-season PM was triggered by high SP,strong 10-m u-component of wind(U10),and strong SSR,with nearsource transport dominated by dust sources.Overall,PM pollution manifests as“static accumulation”during haze and“dynamic excitation”during dust events.This study validates the“de-weathering-SHAP”model for PM attribution in arid regions,providing a scientific basis for targeted prevention strategies in“Belt and Road”dust-affected zones. 展开更多
关键词 Atmospheric particulate matter(PM) Dust source Explainable machine learning Meteorology Emissions Transport
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Fate of dissolved organic matter in the wastewater treatment plant-constructed wetland system 认领 引用
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作者 Xin Li Anning Li +6 位作者 Bentao Bao Zejin Zhang Shiyu Li Xiaoyong Cui Hans Christian Bruun Hansen Qingjun Guo Flemming Ekelund 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期175-184,共10页
Dissolved organic matter(DOM)plays an important role in the nutrient cycle and energy flow.However,as the key node linking anthropogenic DOM with natural ecosystems,limited attention has been paid to the fate of DOM i... Dissolved organic matter(DOM)plays an important role in the nutrient cycle and energy flow.However,as the key node linking anthropogenic DOM with natural ecosystems,limited attention has been paid to the fate of DOM in the municipal wastewater treatment process,especially in the combined wastewater treatment plant and constructed wetland system.In this study,the fluorescence excitation-emission matrix combined with parallel factor analysis(PARAFAC)was applied in the coupled water-processing system to elucidate the fate of DOM in the water treatment process.In terms of the relative abundance of PARAFAC components,amino acid or protein-like DOM and microbial humic-like DOM were predominantly altered in the wastewater treatment plant,whereas low-molecular-weight humic fraction and terrestrial humic-like DOM were predominantly altered in the constructed wetland.Moreover,the concentration of dissolved organic carbon was fluctuating in the system,decoupling from the removal of pollutants such as nitrogen and phosphorus.Correspondingly,the humification index,an indicator of DOM stability,mainly increased in the wastewater treatment plant,whereas the biological index and the fluorescence index exhibited greater variability in the constructed wetland.Based on the combination of the Mantel test,partial least squares path modeling,and random forest analysis,a suggestion is provided that the management of DOM stability can be coordinated with the management of nitrogen,phosphorus,and PARAFAC components like amino acid or protein-like DOM.Thus,this study provided a new picture to understand both the quality and quantity of DOM during water treatment. 展开更多
关键词 Dissolved organic matter Wastewater treatment plant Constructed wetland Fluorescence excitation-emission matrix
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Liquid mulching film mitigates cationic heavy metals migration via enhancing soil organic matter and cation exchange capacity 认领 引用
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作者 Lijuan Cha Zhiyun Zhang +7 位作者 Ruiyao Shi Fangfang Li Gang Chu Lincai Peng Jing Zhao Jing Li Minghao Cheng Min Wu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第5期292-300,共9页
Liquid biodegradable mulching film(LBMFs)technology,an innovative agricultural technology,shows dual potential in plastic pollution reduction and heavy metal contamination control.Although their agronomic benefits are... Liquid biodegradable mulching film(LBMFs)technology,an innovative agricultural technology,shows dual potential in plastic pollution reduction and heavy metal contamination control.Although their agronomic benefits are recognized,the underlying mechanisms of LBMFs in regulating heavy metal biogeochemical cycles remain inadequately understood.This study demonstrates the effectiveness of lignin-based(JH)and chitosan-based(LB)LBMFs in modifying heavy metal speciation and minimizing their uptake by crops.The results indicated that JH and LB significantly enhanced soil organic matter(SOM)by 14.29%-27.01%and cation exchange capacity(CEC)by 20.65%-247.17%,compared to soil blank control,primarily due to the enrichment of colloids derived from lignin/chitosan and the stimulation of microbial activity.Both films reduced the bioavailability of Cd and Pb by promoting their transition from mobile acid solubleeducible(F1/F2)fractions to stable oxidizableesidual(F3/F4)fractions.In contrast,Cu and Zn speciation remained stable due to strong mineral interactions.The LBMFs also inhibited the transfer of heavy metals to edible crops.Crop-specific translocation factor(TF)variations were observed,with JH reducing pak choi TF by 32.62%-76.09%but increasing radish TF by 33.47%-437.55%,linked to lignin’s root chelation and chitosan’s phloem transport dynamics.Additionally,Mantel analysis confirmed bioconcentration factor(BCF)/TF reductions correlated strongly with elevated SOM(r=0.82/0.73)and CEC(r=0.80/0.77),governed by organo-mineral complexation and competitive cation displacement.This work positions LBMFs as valuable tools for enhancing soil health and reducing dietary risks associated with heavy metals in contaminated agricultural lands. 展开更多
关键词 Liquid mulching film Migration activity Soil organic matter Cation exchange capacity
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A critical review of inhibitory effects of substrates and organic matter on anammox:mechanisms and mitigation strategies 认领 引用
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作者 Rui Zhao Da Jin +4 位作者 Xiaonong Zhang Luomiao Ji Xurui Zhu Bo Gao Peng Wu 《ENGINEERING Environment》 SCIE EI CAS CSCD 2026年第2期109-126,共18页
Anaerobic ammonium oxidation(anammox)is an efficient,low-consumption biological nitrogen removal technology,and it shows great potential in wastewater treatment.However,the activity of anammox bacteria is inhibited by... Anaerobic ammonium oxidation(anammox)is an efficient,low-consumption biological nitrogen removal technology,and it shows great potential in wastewater treatment.However,the activity of anammox bacteria is inhibited by high concentrations of key substrates,including ammonia(NH4+),nitrite(NO2-),and organic compounds(such as antibiotics,metals,and other toxicants),through multiple mechanisms.This inhibition has restricted the full-scale engineering application of anammox.Existing literature mainly focuses on single-factor inhibition mechanisms.Moreover,mitigation strategies validated in laboratories have limited effectiveness in complex substrate environments.To fill the above gaps,this review constructs a three-dimensional analytical framework that integrates the fundamental mechanisms,hierarchical mitigation strategy design,and dynamic application verification.It systematically clarifies the synergistic inhibition pathways of ammonia,nitrite,and organic matter.Notably,it emphasizes revealing the multilevel inhibitory mechanisms of organic matter on anammox bacteria.Furthermore,the research proposes a tiered mitigation strategy that integrates microenvironment regulation,microbial community enhancement,and process integration.It also summarizes relevant kinetic models,which can support the prediction,analysis,and engineering optimization of inhibition effects in anammox systems.These findings provide fundamental insights into the concentration threshold effects of substrate inhibition and the molecular interference mechanisms of organic matter.Thus,they offer effective methodologies to enhance the operational stability and application efficiency of anammox technology. 展开更多
关键词 Anammox inhibition Free ammonia Organic matter Mitigation strategies Kinetic models
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Differential enrichment mechanisms of organic matter in middle-upper Triassic lacustrine mudstone,north Kuqa depression(Tarim Basin,China):An integrated approach utilizing inorganic and organic geochemical evidence 认领 引用
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作者 Dejiang Li Qun Zhao +6 位作者 Lingyu Zhao Yanpeng Chen Ze Deng Xiangchun Chang Bingbing Shi Runye Han Shangbin Wang 《Acta Geochimica》 EI CAS CSCD 2026年第2期422-438,共17页
The Kuqa Depression,recognized as one of the best hydrocarbon-enriched depressions within the Tarim Basin,has long been debated regarding its principal source intervals,which has restricted petroleum exploration and d... The Kuqa Depression,recognized as one of the best hydrocarbon-enriched depressions within the Tarim Basin,has long been debated regarding its principal source intervals,which has restricted petroleum exploration and development in this area.This study focuses on the hydrocarbon source rocks of the Middle-Upper Triassic Karamayi Formation and Upper Triassic Huangshanjie Formation in the northern part of the Kuqa Depression through a comprehensive organic and elemental investigation.The examinations indicate that the source rocks of the Karamayi Formation-Huangshanjie Formation are dark mudstones developed in a lacustrine setting.The organic matter abundance generally ranges from fair to good.The organic matter type is mainly TypeⅡ,with a portion being TypeⅢ,and the source rocks have reached a mature stage.During the depositional period of the source rocks in the Karamayi Formation,variations in paleoproductivity,characteristics of ancient water bodies and intensity of hydrothermal activity together influenced the organic matter enrichment model of the Misbrac section,which is controlled by preservation conditions and paleoproductivity.In contrast,the Heiyingshan and Kuqa River sections exhibit paleoproductivity-dominated enrichment mechanisms.During the depositional period of the Huangshanjie Formation,the organic matter enrichment model in the study area is controlled by both the preservation conditions and paleoproductivity. 展开更多
关键词 Organic matter enrichment Lacustrine source rocks Main controlling factors Tarim Basin
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Facet modulation promotes synergy between TiO2 nanomaterials and dissolved organic matter in photocatalytic generation of reactive oxygen species 认领 引用
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作者 Qianwu Wang Fangru He +4 位作者 Yaqi Liu Jingxiang Low Chuanjia Jiang Tong Zhang Wei Chen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第7期253-260,共8页
The efficiency of reactive oxygen species(ROS)generation is the most critical factor controlling the performance of photocatalytic water treatment.Dissolved organic matter(DOM),a ubiquitous and photoedox-active consti... The efficiency of reactive oxygen species(ROS)generation is the most critical factor controlling the performance of photocatalytic water treatment.Dissolved organic matter(DOM),a ubiquitous and photoedox-active constituent in natural and waste waters,may significantly interfere with the rate and pathways of ROS generation.Here,we show that modulating exposed facets of nano-catalysts to regulate the interactions between DOM and nanomaterials can boost ROS production.Specifically,electron paramagnetic resonance spectroscopy and probe test demonstrate that the production rate of superoxide radical anion(O2•-)in a system containing{001}-faceted TiO2nanocrystals and humic/fulvic acid far exceeds those in the systems containing TiO2or DOM alone.In comparison,the synergy between{101}-faceted nano-TiO2and humic/fulvic acid is much less prominent.Enhanced production of singlet oxygen(1O2)is also observed for{001}-faceted nano-TiO2in the presence of DOM,whereas 1O2production by{101}-faceted TiO2is subdued by DOM.Moreover,the{001}-faceted material is much more robust against the inhibition effect of DOM on hydroxyl radical(•OH)production.Thermogravimetric analysis reveals distinct DOM adsorption capacities between the materials.By spectroscopic and electrochemical analyses,we further elucidate the structure-activity relationship between exposed facets and rate-limiting factors in ROS generation.Exposed facets regulate the specific mode of interaction between TiO2 and DOM,which subsequently determines the charge carrier separation,adsorption of O2,as well as quenching of photogenerated holes and ROS.The findings provide deeper insights for improving the efficacy of photocatalytic water treatment through facet engineering of semiconductors. 展开更多
关键词 Facet modulation Reactive oxygen species Photocatalytic water treatment Nanomaterials Dissolved organic matter
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Reinterpretation of volcanic and hydrothermal influence on organic matter accumulation and paleo-depositional environment in a lacustrine shale system:Insight from interpretable machine learning model 认领 引用
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作者 Enze Wang Xiaoxiao Ma +7 位作者 Maowen Li Yingxiao Fu Menhui Qian Tingting Cao Zhiming Li Yue Feng Zhijun Jin Tong Li 《Petroleum Science》 SCIE EI CAS CSCD 2026年第6期3037-3058,共22页
The significant resource potential of lacustrine shale oil has spurred interest in understanding organic matter enrichment mechanisms.However,conventional analytical methods are often constrained by multicollinearity ... The significant resource potential of lacustrine shale oil has spurred interest in understanding organic matter enrichment mechanisms.However,conventional analytical methods are often constrained by multicollinearity and statistical limitations,hindering accurate identification of enrichment mechanisms under complex depositional conditions.Interpretable machine learning models present a viable alternative to address this issue.The 7th member of the Yanchang Formation(T3y7)is one of the key targets for lacustrine shale oil exploration and development in China.Nevertheless,the role of volcanic activity in organic matter accumulation within this unit remains controversial,hindering a comprehensive understanding of organic enrichment mechanisms in lacustrine systems.To address this challenge,this study integrates geochemical data from YYa borehole in the southern Ordos Basin and previously published datasets to reconstruct the paleoenvironmental settings of various lithofacies assemblages in the T3y7 shale.By leveraging published literature and new experimental data,this study develops an interpretable machine learning model based on random forest(RF),extreme gradient boosting(XGBoost),and support vector machine(SVM)to quantitatively determine the dominant controls on organic matter accumulation.Using the T3y7 shale as a case study,the influence mechanisms of both volcanic and hydrothermal activities on organic enrichment in lacustrine shale systems are further explored.Two distinct lithofacies assemblages were identified in the T3y7 shale:laminated black shale and massive dark-gray mudstone.These assemblages are characterized by significant differences in paleoclimate,salinity,redox conditions,primary productivity,terrigenous influx,and the intensity of volcanic and hydrothermal activities.Results from the interpretable machine learning model indicate that organic matter enrichment in the T3y7 shale is primarily governed by the coupling of high primary productivity and favorable preservation conditions,and decoupling of volcanic and hydrothermal activities was a significant factor in the development of different lithofacies in the T3y7.Importantly,the influence of volcanic activity on organic matter enrichment in lacustrine systems is nonlinear:while moderate volcanic activity promotes organic accumulation,intense volcanic activity tends to exert a detrimental effect.In contrast,hydrothermal activity appears to play a more consistently positive role in the formation of organic-rich shale in the T3y7.These findings highlight the need to distinguish between volcanic and hydrothermal processes in future studies in order to more obje ctive ly evaluate their respective impacts on organic-rich shale development in lacustrine settings.This study provide s a robust frame work for understanding the mechanisms of organic matter enrichment in shale deposited under complex geological conditions,and deepens our insight into the formation of organic-rich shale in lacustrine sedimentary systems influenced by volcanic and hydrothermal activity. 展开更多
关键词 Lacustrine shale Paleoenvironment reconstruction Interpretable machine leaning Volcanic and hydrothermal activity Organic matter enrichment mechanisms Ordos Basin
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