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Exploration of reaction rates of chlorine dioxide with tryptophan residue in oligopeptides and proteins 认领 引用 被引量：2
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作者 Yuexian Ge Yu Lei +3 位作者 Xin Lei Wenhui Gan Longfei Shu Xin Yang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2020年第7期129-136,共8页
Chlorine dioxide(ClO2),an alternative disinfectant to chlorine,has a superior ability to inactivate microorganisms,in which protein damage has been considered as the main inactivation mechanism.However,the reactivity ... Chlorine dioxide(ClO2),an alternative disinfectant to chlorine,has a superior ability to inactivate microorganisms,in which protein damage has been considered as the main inactivation mechanism.However,the reactivity of ClO2 with amino acid residues in oligopeptides and proteins remains poorly investigated.In this research,we studied the reaction rate constants of ClO2 with tryptophan residues in five heptapeptides and four proteins using stopped-flow or competition kinetic method.Each heptapeptide and protein contain only one tryptophan residue and the reactivity of tryptophan residue with ClO2 was lower than that of free tryptophan(3.88×10^4(mol/L)^-1 sec^-1 at pH 7.0).The neighboring amino acid residues affected the reaction rates through promoting inter-peptide aggregation,changing electron density,shifting pKa values or inducing electron transfer via redox reactions.A single amino acid residue difference in oligopeptides can make the reaction rate constants differ by over 60%(e.g.3.01×10^4(mol/L)^-1 sec^-1 for DDDWNDD and 1.85×10^4(mol/L)^-1 sec^-1 for DDDWDDD at pH 7.0(D:aspartic acid,W:tryptophan,N:asparagine)).The reaction rates of tryptophan-containing oligopeptides were also highly pH-dependent with higher reactivity for deprotonated tryptophan than the neutral specie.Tryptophan residues in proteins spanned a 4-fold range reactivity toward ClO2(i.e.0.84×10^4(mol/L)^-1 sec^-1 for ribonuclease T1 and 3.21×10^4(mol/L)^-1 sec^-1 for melittin at pH 7.0)with accessibility to the oxidant as the determinating factor.The local environment surrounding the tryptophan residue in proteins can also accelerate the reaction rates by increasing the electron density of the indole ring of tryptophan or inhibit the reaction rates by inducing electron transfer reactions.The results are of significance in advancing understanding of ClO2 oxidative reactions with proteins and microbial inactivation mechanisms. 展开更多
关键词 Chlorine dioxide(ClO2) Tryptophan Protein Disinfection Water treatment
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Virucidal Efficacy of Chlorine Dioxide Interventions on MS2 Phage Bioaerosol in a Laboratory Chamber 认领 引用
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作者 Shawn Jones George Lukasik +1 位作者 Jeffrey Driver Raymond Harbison 《Occupational Diseases and Environmental Medicine》 2022年第3期206-216,共11页
The ongoing SARS-CoV-2 outbreak has rapidly increased the desire to manage bioaerosol exposures in indoor settings. Studies using chlorine dioxide gas (ClO2) at low concentrations have shown this intervention to be an... The ongoing SARS-CoV-2 outbreak has rapidly increased the desire to manage bioaerosol exposures in indoor settings. Studies using chlorine dioxide gas (ClO2) at low concentrations have shown this intervention to be an effective mitigation strategy against viral, bacterial, and fungal elements in ambient air. There is an array of available products for generating ClO2 gas however most involve the use of expensive or sophisticated technology that makes their applicability limited to specialized consumers. The purpose of this study was to determine the virucidal efficacy of three pragmatic and affordable, ClO2 generating products using an aerosolized MS2 surrogate in a sealed chamber room under five different scenarios. The products tested included: Ultrashock—a ClO2 releasing pod (30 ppmv), Filter Media—a ClO2 impregnated zeolite media made to fit into an air blower housing (2 impregnated media filled air reactor tube (2 air samples were collected from sampling ports on the outer chamber wall at 0, 90 and 180 minutes. The Ultrashock and Filter Media with air flow in the rapid sweep scenario showed the greatest reduction in air MS2 (T180 = 99.992% and T180 = 99.996% respectively) compared to the control (T180 = 99.6%). When compared to the control results, the filter media with air flow engaged prior to the introduction of MS2 yielded reductions of 99.87% and 99.93% in air and on surfaces respectively at T0, demonstrating the protective effect residual ClO2 has against air and surface contamination. These product formats have potential uses as remedial and preventative interventions against viral constituents in air and should undergo further evaluation to determine efficacy and human health risk. 展开更多
关键词 Virucidal Activity Chlorine Dioxide MS2 Phage Bioaerosols
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不同保鲜处理对生姜采后贮藏品质及香气挥发物的影响 认领 引用 被引量：1
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作者 邓秀丽 秦顺新 +2 位作者 宋迪 安容慧 杨相政 《食品工业科技》 EI CAS 北大核心 2026年第14期390-399,共10页
本文探究了二氧化氯(Chlorine dioxide,ClO2)、抗坏血酸(Vitamin C,VC)、肉桂醛(Cinnamaldehyde,CA)及联合处理(ClO2+VC+CA)对生姜采后贮藏品质的影响。在冷藏条件(13±0.5℃,相对湿度90%)下,综合分析不同保鲜处理对生... 本文探究了二氧化氯(Chlorine dioxide,ClO2)、抗坏血酸(Vitamin C,VC)、肉桂醛(Cinnamaldehyde,CA)及联合处理(ClO2+VC+CA)对生姜采后贮藏品质的影响。在冷藏条件(13±0.5℃,相对湿度90%)下,综合分析不同保鲜处理对生姜的理化指标和相关酶活性的调控作用,并采用气相色谱-离子迁移谱(Gas Chromatography Ion Mobility Spectroscopy,GC-IMS)分析其挥发性香气物质的变化。结果表明:三种保鲜处理均可显著延缓生姜品质劣变(P<0.05),但联合处理具有协同增效的作用。与对照组(Control group,CK)相比,贮藏120 d时,联合处理组生姜失水率降低了57.67%,苯丙氨酸解氨酶(Phenylalanine ammonialyase,PAL)、超氧化物歧化酶(Superoxide dismutase,SOD)、过氧化氢酶(Catalase,CAT)活性分别高了7.78%、11.22%和28.61%,多酚氧化酶(Polyphenol,PPO)和过氧化物酶(Peroxidase,POD)含量显著下降(P<0.05),姜辣素、粗蛋白和总糖含量分别高了31.65%、35.47%和40.02%。此外,GC-IMS结合主成分分析表明不同处理组特征挥发性物质有差异,联合处理有效促进了青香(香茅醛)、果香(β-月桂烯)、辛辣香气((E,E)-2,4-己二烯醛)等特性物质的积累与保留。综上,联合保鲜处理可以通过提高生姜采后抗氧化酶活性、减缓香气挥发物流失来维持采后贮藏品质,本研究为生姜保鲜技术开发提供了理论依据和技术参考。 展开更多
关键词 生姜保鲜 二氧化氯 抗坏血酸 肉桂醛 联合处理 香气挥发物 气相色谱-离子迁移谱 采后生理调控
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Degradation of carbamazepine by the UVA-LED365/ClO2/NaClO process:Kinetics,mechanisms and DBPs yield 认领 引用
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作者 Chenyan Hu Yihui Wu +5 位作者 Zhengyu Dong Ziyi Dong Shengjie Ji Lili Hu Xinyu Yang Hao Liu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2025年第2期399-408,共10页
A mixed oxidant of chlorine dioxide(ClO2)and NaClO was often used in water treatment.A novel UVA-LED(365 nm)-activated mixed ClO2/NaClO process was proposed for the degradation of micropollutants in this stud... A mixed oxidant of chlorine dioxide(ClO2)and NaClO was often used in water treatment.A novel UVA-LED(365 nm)-activated mixed ClO2/NaClO process was proposed for the degradation of micropollutants in this study.Carbamazepine(CBZ)was selected as the target pollutant.Compared with the UVA365/ClO2 process,the UVA365/ClO2/NaClO process can improve the degradation of CBZ,with the rate constant increasing from 2.11×10−4 sec−1 to 2.74×10−4 sec−1.In addition,the consumption of oxidants in the UVA365/ClO2/NaClO process(73.67%)can also be lower than that of UVA365/NaClO(86.42%).When the NaClO ratio increased,both the degradation efficiency of CBZ and the consumption of oxidants can increase in the UVA365/ClO2/NaClO process.The solution pH can affect the contribution of NaClO in the total oxidant ratio.When the pH range of 6.0-8.0,the combination process can generate more active species to promote the degradation of CBZ.The change of active species with oxidant molar ratio was investigated in the UVA365/ClO2/NaClO process.When ClO2 acted as the main oxidant,HO·and Cl·were the main active species,while when NaClO was the main oxidant,ClO·played a role in the system.Both chloride ion(Cl-),bicarbonate ion(HCO3-),and nitrate ion(NO3-)can promote the reaction system.As the concentration of NaClO in the reaction solution increased,the generation of chlorates will decrease.The UVA365/ClO2/NaClO process can effectively control the formation of volatile disinfection by-products(DBPs),and with the increase of ClO2 dosage,the formation of DBPs can also decrease. 展开更多
关键词 UVA Chlorine dioxide(ClO2) NaClO Carbamazepine(CBZ) Disinfection by-products
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基于ClO--HO2-平衡机制的氯介导电催生1O2机理探究 认领 引用 被引量：1
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作者 孙浩然 殷明明 +1 位作者 唐海亮 王立章 《中国环境科学》 EI CAS CSCD 北大核心 2025年第1期167-174,共8页
鉴于单线态氧(1O2)氧化能力强、对环境友好等特点,进一步揭示电化学过程中氯介导产1O2的反应机理不仅能够提高废水处理效果,还可以减少活性氯带来的副作用.因此,采用电化学测试、罗丹明B(RhB)模拟废水处理等手段评估Ir-Ta/T... 鉴于单线态氧(1O2)氧化能力强、对环境友好等特点,进一步揭示电化学过程中氯介导产1O2的反应机理不仅能够提高废水处理效果,还可以减少活性氯带来的副作用.因此,采用电化学测试、罗丹明B(RhB)模拟废水处理等手段评估Ir-Ta/Ti和Pt/Ti电极的性能,并探讨不同条件(Cl-浓度、电极析氯活性、外加H2O2、通入O2)对电化学产1O2的影响.结果表明,以1O2为主导的电化学体系能够去除超过96%的RhB且可缩短降解路径.高效生成1O2的基础是维持体系中产生的次氯酸根(ClO-)与过氧氢根(HO2-)之间的平衡,任何一方过量都会抑制1O2的产生.本次研究以期为促进不同环境情况下1O2的生成和电极的定向制备与改性提供理论依据. 展开更多
关键词 氯介导 电化学产1O2 RhB去除 ClO-—HO2-平衡
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Effect of chlorine dioxide on avian influenza A(H7N9)virus 认领 引用 被引量：2
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作者 Zhiping Sun Yun Qian +7 位作者 Norio Ogata Xia Cai Wendong Han Youhua Xie Hirofumi Morino Koushirou Sogawa Takashi Shibata Di Qu 《Biosafety and Health》 CAS CSCD 2022年第1期53-57,共5页
Avian influenza remains a threat to human wellbeing.Hypochlorite derivatives are commonly used as disinfectants to prevent the spread of the disease.The World Health Organization(WHO)has listed chlorine dioxide(ClO_(2... Avian influenza remains a threat to human wellbeing.Hypochlorite derivatives are commonly used as disinfectants to prevent the spread of the disease.The World Health Organization(WHO)has listed chlorine dioxide(ClO2)as an A1‐level,safe,and efficient disinfectant.In this study,we tested the efficacy of ClO2,in aqueous solution and gas forms,against avian influenza A(H7N9)virus.The virus suspension was mixed with ClO2 aqueous solutions of various concentrations and for various time intervals.Aliquots of the mixture were then serially diluted,and the 50%tissue culture infective dose(TCID50)was measured with a hemagglutination test on MDCK cells.ClO2 gas produced from generators was introduced in a chamber containing the virus suspension in a Petri dish.The infective activity of the surviving virus was measured by the hemagglutination test.An aqueous solution of ClO2 at 126μg/mL for 15 s was effective given that no surviving virus was detected with the hemagglutination test.ClO2 gas at>5μL/L sustained for 1 h inactivated the virus effectively,while at 2.5μL/L for 1 h,it only partially inactivated the virus.ClO2 as gas or aqueous solution at a certain concentration is effective in inactivating the H7N9 virus,and can be applied for the decontamination and disinfection of environments. 展开更多
关键词 Chlorine dioxide Influenza virus A H7N9 Disinfection Aqueous solution Gas ClO2
An ab initio study on single electron transfer between ClO_2 and phenol 认领 引用 被引量：4
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作者 崔崇威 黄君礼 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2004年第1期43-45,共3页
The SET mechanism between chlorine dioxide （ClO2） and phenol was studied by using ab initio method at 4-31G* level. Geometries of the reactants, intermediate and products of the reaction were optimized and the singl... The SET mechanism between chlorine dioxide （ClO2） and phenol was studied by using ab initio method at 4-31G* level. Geometries of the reactants, intermediate and products of the reaction were optimized and the single point energy calculations of the species were performed. The relative structure data of the reactants, intermediate and products are given.The SET mechanism between ClO2and phenol was confirmed by ab initio calculations. The reaction is exothermic about 200 88 kJ/mol. 展开更多
关键词 chlorine dioxide (ClO_2) phenol single electron transfer ab initio calculation
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不同药剂组合对紫云红芯薯的贮藏效果 认领 引用 被引量：3
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作者 蔡甫格 樊祖立 +3 位作者 牛力立 朱江 鲍菊 张秀伟 《贵州农业科学》 CAS 2023年第12期120-124,共5页
【目的】探明氯苯胺灵(CIPC)、香芹酮和二氧化氯(ClO2)不同组合处理对甘薯贮藏保鲜的效果,为其生产应用提供科学依据。【方法】以ClO2为防腐剂,以香芹酮和CIPC为抑芽剂,采用两因素随机区组试验方法,研究不同组合处理〔无防腐剂+... 【目的】探明氯苯胺灵(CIPC)、香芹酮和二氧化氯(ClO2)不同组合处理对甘薯贮藏保鲜的效果,为其生产应用提供科学依据。【方法】以ClO2为防腐剂,以香芹酮和CIPC为抑芽剂,采用两因素随机区组试验方法,研究不同组合处理〔无防腐剂+无抑芽剂(A1B1)、无防腐剂+香芹酮(A1B2)、无防腐剂+CIPC(A1B3)、ClO2+无抑芽剂(A2B1)、ClO2+香芹酮(A2B2)和ClO2+CIPC(A2B3)〕对甘薯贮藏保鲜的效果。【结果】随着贮藏时间的延长,6个组合处理紫云红芯薯的发芽率均呈上升趋势,90 d时各处理(A2B2除外)发芽率为1.23%~25.43%,A1B3最高,A2B3最低;105 d和120 d时各处理发芽率分别为2.97%~37.17%和10.57%~62.03%,均以A1B3最高,分别以A2B2和A2B3最低;135 d时各处理发芽率为18.17%~100.00%,A1B1最高,A2B2最低。施用防腐剂能有效抑制紫云红芯薯的失重率和腐烂率,施用抑芽剂的抑制效果不明显,紫云红芯薯贮藏135 d时,不同处理的平均失重率为27.72%~41.56%,依次为A1B1>A1B3>A1B2>A2B2>A2B1>A2B3;平均腐烂率为11.00%~39.67%,依次为A1B1>A1B2>A1B3>A2B1=A2B3>A2B2。【结论】紫云红芯薯贮藏期施用ClO2+香芹酮能有效抑制薯块发芽,降低薯块失重率,延缓品质劣化;ClO2防腐效果良好,可应用于实际生产。 展开更多
关键词 紫云红芯薯 贮藏 防腐剂 抑芽剂 氯苯胺灵 香芹酮 二氧化氯
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间接光度法测定饮水中二氧化氯的浓度 认领 引用 被引量：2
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作者 邓临新 李崧 谢家理 《四川环境》 2003年第4期49-51,63,共3页
在酸性介质中 ,将二氧化氯与过量的亚铁离子反应 ,未反应的亚铁离子再与邻菲罗啉显色 ,通过测定显色溶液吸光度值的改变来实现对水中二氧化氯的定量。本文通过大量实验确定了该方法的实验条件以及干扰因素。本法操作简便无毒 ,专一性强 ... 在酸性介质中 ,将二氧化氯与过量的亚铁离子反应 ,未反应的亚铁离子再与邻菲罗啉显色 ,通过测定显色溶液吸光度值的改变来实现对水中二氧化氯的定量。本文通过大量实验确定了该方法的实验条件以及干扰因素。本法操作简便无毒 ,专一性强 ,分析速度快 ,准确度与灵敏度较高。检出限为 :( 5 3 6× 10 -3 1 3 3 )mg/L。相关系数为 :0 9997。变异系数为 :2 5 5 %。 展开更多
关键词 间接光度法 饮水 二氧化氯浓度 测定 亚铁离子
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ClO2消毒工艺对污水处理厂出水超级耐药基因的影响 认领 引用 被引量：1
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作者 程春燕 李海北 +7 位作者 梁永兵 师丹阳 陈郑珊 杨栋 焦巧瑞 邵一帆 李君文 金敏 《环境科学》 EI CAS CSCD 北大核心 2021年第4期1939-1945,共7页
为了研究二氧化氯(chlorine dioxide,ClO2)消毒工艺对污水处理厂出水中超级耐药基因(super antibiotic resistance genes,SARGs)的去除效果,对污水处理厂出水消毒前后的水样进行了全年采集,并采用微孔滤膜正压过滤法及核酸吸附柱-洗... 为了研究二氧化氯(chlorine dioxide,ClO2)消毒工艺对污水处理厂出水中超级耐药基因(super antibiotic resistance genes,SARGs)的去除效果,对污水处理厂出水消毒前后的水样进行了全年采集,并采用微孔滤膜正压过滤法及核酸吸附柱-洗脱法分别富集水中细菌和胞外核酸后,利用荧光定量PCR技术对其中的9种SARGs进行定量检测.结果表明,无论是胞内还是胞外核酸,均有NDM-1、MCR-1和MEC-A被检测出;同时,ClO2消毒后上述3种SARGs的胞内相对总浓度明显上升(P<0.05),且ClO2消毒对胞内SARGs相对浓度的影响与季节有关,其中春季、夏季和秋季均发生上升,且春季升高最为明显,达2倍,而冬季出水在消毒前后均未测出胞内SARGs;胞外SARGs则在ClO2消毒前后没有明显浓度变化.因此,ClO2消毒不能有效去除污水处理厂出水中胞内和胞外SARGs污染. 展开更多
关键词 污水处理厂(WWTP) 二氧化氯(ClO2) 消毒 胞内超级耐药基因(iSARGs) 胞外超级耐药基因(eSARGs)
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果蔬采后致腐病菌检测及防治 认领 引用 被引量：12
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作者 顾沛雯 张光弟 +1 位作者 王华荣 丁波 《农业科学研究（中英文）》 2012年第1期1-6,共6页
引起果蔬采后腐烂的病原菌主要分属于葡萄孢属(Botrytis)、曲霉属(Aspergillus)、青霉属(Penicillium)、根霉属(Rhizopus)和链格孢属(Alternaria).其中A.sp.和R.sp.是果蔬常温运输过程中的主要致腐菌,B.sp.、A.sp.和P.sp.是果蔬低温贮... 引起果蔬采后腐烂的病原菌主要分属于葡萄孢属(Botrytis)、曲霉属(Aspergillus)、青霉属(Penicillium)、根霉属(Rhizopus)和链格孢属(Alternaria).其中A.sp.和R.sp.是果蔬常温运输过程中的主要致腐菌,B.sp.、A.sp.和P.sp.是果蔬低温贮运条件下的主要致腐菌.采用仲丁胺和二氧化氯2种药剂对采后蔬菜进行熏蒸和浸泡保鲜处理.结果表明:低温与保鲜剂处理相结合,可明显提高果蔬采后运输及货架期9～11d. 展开更多
关键词 采后果蔬 致腐菌检测 仲丁胺熏蒸 二氧化氯浸泡 保鲜
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活性炭纤维、二氧化氯及其联用工艺去除2-MIB 认领 引用
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作者 何小燕 刘清 +3 位作者 李青松 唐凯 高乃云 马晓雁 《中南大学学报（自然科学版）》 EI CAS CSCD 北大核心 2014年第3期973-978,共6页
采用液液萃取与气相色谱-质谱联用技术研究二氧化氯、活性炭纤维及二氧化氯与活性炭纤维联用3种方法对2-MIB的去除效果,考察二氧化氯和活性炭纤维投加量、溶液pH和底物初始质量浓度对目标物去除效果的影响。研究结果表明:ClO2单独去除... 采用液液萃取与气相色谱-质谱联用技术研究二氧化氯、活性炭纤维及二氧化氯与活性炭纤维联用3种方法对2-MIB的去除效果,考察二氧化氯和活性炭纤维投加量、溶液pH和底物初始质量浓度对目标物去除效果的影响。研究结果表明:ClO2单独去除的最佳投加量为8 mg/L,pH<7时效果较好。ACF最佳投加量和最佳pH分别为20 mg/L和6.14。2-MIB的去除率都随其初始质量浓度增大而降低。ACF与ClO2联用工艺中二者投加量分别为1 mg/L和14 mg/L时,2-MIB的去除率可达88.2%,比单独吸附去除效果提高4.6%,同时降低30%的ACF投加量,此外,联用工艺对于处理低质量浓度的2-MIB更为有效。ACF吸附2-MIB符合伪二级反应动力学模型,粒子内部扩散是吸附过程的主要控制步骤,吸附可能是个复杂的非均相固液反应。 展开更多
关键词 2-MIB 二氧化氯 活性炭纤维 联用工艺 动力学
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二氧化氯在油田增产增注中的应用 认领 引用 被引量：25
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作者 田兴国 吴彦川 +1 位作者 山其坤 解希镇 《油田化学》 CAS 北大核心 1999年第4期384-389,共6页
本文介绍了二氧化氯的基本性质及工业生产原理，McCafferty 的岩心解堵实验，用二氧化氯解除油井铁硫化物堵塞、注水井微生物堵塞及注聚合物井堵塞的现场结果。
关键词 二氧化氯 解堵 氧化剂 采油井 注水井 修井
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Dosing low-level ferrous iron in coagulation enhances the removal of micropollutants, chlorite and chlorate during advanced water treatment 认领 引用 被引量：1
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作者 Gabriela Scheibel Cassol Chii Shang +3 位作者 Juan Li Li Ling Xin Yang Ran Yin 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2022年第7期119-128,共10页
Drinking water utilities are interested in upgrading their treatment facilities to enhance micropollutant removal and byproduct control.Pre-oxidation by chlorine dioxide(ClO2)followed by coagulation-flocculation-se... Drinking water utilities are interested in upgrading their treatment facilities to enhance micropollutant removal and byproduct control.Pre-oxidation by chlorine dioxide(ClO2)followed by coagulation-flocculation-sedimentation and advanced oxidation processes(AOPs)is one of the promising solutions.However,the chlorite(ClO2-)formed from the ClO2 preoxidation stage cannot be removed by the conventional coagulation process using aluminum sulfate.ClO2–negatively affects the post-UV/chlorine process due to its strong radical scavenging effect,and it also enhances the formation of chlorate(ClO3–).In this study,dosing micromolar-level ferrous iron(Fe(II))into aluminum-based coagulants was proposed to eliminate the ClO2–generated from ClO2 pre-oxidation and benefit the post-UV/chlorine process in radical production and ClO3–reduction.Results showed that the addition of 52.1-μmol/L FeSO4 effectively eliminated the ClO2-generated from the pre-oxidation using 1.0 mg/L(14.8μmol/L)of ClO 2.Reduction of ClO2-increased the degradation rate constant of a model micropollutant(carbamazepine)by 55.0%in the post-UV/chlorine process.The enhanced degradation was verified to be attributed to the increased steady-state concentrations of HO-·and ClO2·by Fe(II)addition.Moreover,Fe(II)addition also decreased the ClO3–formation by 53.8%in the UV/chlorine process and its impact on the formation of chloroorganic byproducts was rather minor.The findings demonstrated a promising strategy to improve the drinking water quality and safety by adding low-level Fe(II)in coagulation in an advanced drinking water treatment train. 展开更多
关键词 Chlorine dioxide(ClO2) Advanced oxidation process Ferrous iron Micropollutants Disinfection byproducts(DBPs)
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二氧化氯发生器杀菌及消毒效果观察 认领 引用 被引量：7
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作者 杨怡艳 刘衡川 +1 位作者 林怡伶 李迎慧 《现代预防医学》 CAS 2001年第4期454-456,共3页
目的 :观察 YHL - X2 0 0型消毒剂发生器制备的二氧化氯消毒剂对微生物杀灭效果及对饮用水水源、医院污水的杀菌情况。检测该设备流速对二氧化氯产量的影响。方法 :对大肠杆菌、白色念球菌、枯草杆菌黑色变种芽胞菌的定量杀菌实验 ;现... 目的 :观察 YHL - X2 0 0型消毒剂发生器制备的二氧化氯消毒剂对微生物杀灭效果及对饮用水水源、医院污水的杀菌情况。检测该设备流速对二氧化氯产量的影响。方法 :对大肠杆菌、白色念球菌、枯草杆菌黑色变种芽胞菌的定量杀菌实验 ;现场处理医院污水的细菌总数、粪大肠菌群数检测 ;现场处理深井水的细菌总数、大肠菌群数检测 ;在设备的加样流速为 0 .8kg/ h、 2 .0 kg/ h、 2 .5 kg/ h、 4.0 kg/ h时检测相应二氧化氯的含量。结果 :以含 10 .0 m g/ L Cl O2 对水中大肠杆菌、白色念珠菌作用 1分钟或含 80 .0 mg/ L Cl O2 溶液对枯草杆菌黑色变种芽胞菌作用 15分钟杀灭率均达到 99.9%以上。杀菌作用受有机物影响明显。对医院污水处理 ,以 2 0 0 .0 g/ h的 Cl O2 发生量 ,经射流器混入待处理污水 ,作用 30分钟后 ,细菌总数和粪大肠菌群数符合污水综合排放标准 (GB8978- 1996 ) ;对深井水的处理 ,以 6 4.89g/ h Cl O2 的发生量 ,经射流器混入待处理水 ,作用 30分钟后 ,细菌总数和大肠菌群数符合生活饮用水标准 (GB5 749- 85 )。该设备加样流速越大 ,二氧化氯的产量越多 ,从而控制单位时间内二氧化氯的产量 ,使该消毒液发挥良好的消毒效果。 展开更多
关键词 水消毒 二氧化氯发生器 流速 ClO2产量
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二氧化氯无机消毒副产物的控制现状 认领 引用 被引量：10
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作者 苍岩 郭晗 张小磊 《净水技术》 CAS 2024年第5期35-44,79,共10页
二氧化氯(ClO2)处理饮用水生成的无机消毒副产物亚氯酸盐(ClO2(-))和氯酸盐(ClO-3)对人体健康有潜在危害,引起了世界范围的强烈关注。目前,国内外对控制ClO2无机消毒副产物已有广泛研究。文章总结了ClO2无机消毒副产物的各... 二氧化氯(ClO2)处理饮用水生成的无机消毒副产物亚氯酸盐(ClO2(-))和氯酸盐(ClO-3)对人体健康有潜在危害,引起了世界范围的强烈关注。目前,国内外对控制ClO2无机消毒副产物已有广泛研究。文章总结了ClO2无机消毒副产物的各类来源,并针对性从发生器优化、反应过程控制以及生成后去除3方面,详细讨论了饮用水ClO2无机消毒副产物的控制研究进展。文中提出在源头控制中“优选反应器、优化杂氯”,在消毒过程中“多种方式结合”,以控制无机消毒副产物的生成。此外,消毒后可使用活性炭、Fe2+、硫化物、氧化法等技术去除无机消毒副产物。最后总结了当前研究存在的问题,并展望了未来研究的发展方向。 展开更多
关键词 二氧化氯 亚氯酸盐 氯酸盐 控制技术 无机消毒副产物
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一种新型H2S抑制剂的研究 认领 引用 被引量：1
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作者 汪仙明 张顶学 +2 位作者 孙意 李斌 黄译萱 《辽宁化工》 CAS 2022年第3期317-320,共4页
为研制一种适用于酸性条件下的固体H2S抑制剂,在室温(20℃)酸性条件下以水为溶剂、以二乙醇(DEA)胺和二氧化氯(ClO2)作为抑制剂对H2S抑制率进行研究,利用硬脂酸、氢氧化钠、羟丙基甲基纤维素、聚乙二醇和七水硫酸锌使抑制剂成... 为研制一种适用于酸性条件下的固体H2S抑制剂,在室温(20℃)酸性条件下以水为溶剂、以二乙醇(DEA)胺和二氧化氯(ClO2)作为抑制剂对H2S抑制率进行研究,利用硬脂酸、氢氧化钠、羟丙基甲基纤维素、聚乙二醇和七水硫酸锌使抑制剂成型。经实验20 mL 15%的二乙醇胺和0.57%的二氧化氯溶液抑制效果最佳,达到67.14%。不同温度条件下抑制剂对硫化氢的抑制率随温度上升而降低,基本稳定在66%~67%之间。不同温度条件下抑制剂与混合酸液体系(以镇北油田在用酸液体系为例)配伍性良好,抑制率随温度上升而降低,基本稳定在65%~67%之间。实验结果表明:成型抑制剂以抑制剂与七水硫酸锌质量比为1∶9时的抑制剂效果最好,达到80.57%。该新型H2S抑制剂在不同酸性条件、温度下都拥有较好的抑制效果,固态成型后为解决油田液态抑制剂加注困难、加注浪费问题提供了参考方案。 展开更多
关键词 DEA ClO2 H2S 抑制率 酸性条件 固态
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包装饮用水微生物及消毒副产物的控制与平衡 认领 引用 被引量：5
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作者 葛明明 《净水技术》 CAS 2024年第9期44-53,共10页
在包装饮用水生产中,利用氯化手段灭菌消毒会产生三卤甲烷等有机消毒副产物,而采用二氧化氯会导致亚氯酸盐等无机消毒副产物增加;紫外线(UV)照射对水杀菌时会形成亚硝酸盐,产品中加臭氧抑菌将增加溴酸盐风险。文章重点讨论各消毒杀菌手... 在包装饮用水生产中,利用氯化手段灭菌消毒会产生三卤甲烷等有机消毒副产物,而采用二氧化氯会导致亚氯酸盐等无机消毒副产物增加;紫外线(UV)照射对水杀菌时会形成亚硝酸盐,产品中加臭氧抑菌将增加溴酸盐风险。文章重点讨论各消毒杀菌手段对水体成分的影响,研究消毒副产物之间的机理和转化关系;采用消毒剂精准投加且无残留冲洗、UV照射剂量控制及硝酸盐安全界限、缩小臭氧作用时间等工艺改进方法,从而降低消毒副产物的风险。对照欧盟控菌标准,从尊重与保护水的天然特性和全过程卫生控制出发,结合包装水工厂实操,适度消毒,平衡微生物控制与消毒副产物产生的关系。 展开更多
关键词 三卤甲烷(THM) 二氧化氯(ClO2) 亚氯酸盐 臭氧 溴酸盐 紫外线照射 亚硝酸盐 微生物控制
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二氧化氯用作生产洗瓶水杀菌剂效果评估 认领 引用
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作者 许云岭 李国华 《饮料工业》 2005年第1期42-44,共3页
通过理论研究与实践探讨,论证ClO2用作洗瓶水杀菌剂的有效性和可行性。经过统计对比与分析,验证了ClO2用作洗 瓶水杀菌剂的效果,从而提升杀菌效果并降低成本。
关键词 二氧化氯 洗瓶水 杀菌剂
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A study on rapid acid chrome black (MB 7) spectrophotometric determination of ClO2 and catalytic degradation of 2,6-dinitro-p-cresol (DNPC) by ClO2 认领 引用
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作者 Jing DONG Huilong WANG 《Frontiers of Chemical Science and Engineering》 SCIE CSCD 2011年第2期245-251,共7页
Experiments were conducted to investigate the degradation of 2,6-dinitro-p-cresol(DNPC)in the chlorine dioxide(ClO2)catalytic oxidation process.Pure aluminum oxide was used as the catalyst in this process.The degra... Experiments were conducted to investigate the degradation of 2,6-dinitro-p-cresol(DNPC)in the chlorine dioxide(ClO2)catalytic oxidation process.Pure aluminum oxide was used as the catalyst in this process.The degradation of DNPC by ClO2 using aluminum oxide as catalyst was systematically studied by varying the experimental parameters,such as pH values,catalyst dosage,the initial concentration of DNPC and ClO2,reaction time,etc.Under optimal condition(DNPC concentration 39 mg$L–1,ClO2 concentration 0.234 g$L–1,reaction time 15 min,catalyst dosage 4.7 g$L–1 and pH 4.32),almost complete degradation of DNPC can be achieved.The kinetic studies revealed that the ClO2 catalytic oxidation degradation of DNPC followed pseudo-first-order kinetics with respect to both ClO2 and DNPC concentration.The repetitive use of the catalyst was investigated along sequential feed-batch trials.The catalyst performed efficiently afterfive runs.In addition,a simple and convenient method for the determination of ClO2 in water was developed by using acid chrome black 7(MB 7)spectrophotometry in this paper. 展开更多
关键词 chlorine dioxide 2 6-dinitro-p-cresol(DNPC) aluminum oxide water treatment MB 7 spectro-photometry
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