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Influence of Copper on Transport and Dissipation of Lambda-Cyhalothrin and Cypermethrin in Soils

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Pedosphere 2013年第3期23卷 395-401页

作者： LIU jun L Xiao-Meng XIE Ji-Min LI Ping-Ping HAN Jian-Gang sun cheng school of the environment Jiangsu University state key laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences school of Chemistry and Chemical Engineering Jiangsu University Jiangsu Provincial key laboratory of Modern Agricultural Equipment and Technology Institute of Agricultural Engineering Jiangsu University state key Lab of pollution {3. and resource reuse Nanjing University

Repeated applications of bordeaux mixture （a blend of copper sulfate and calcium hydroxide） and pyrethroid insecticides （Pys） have led to elevated copper （Cu） and Pys concentrations in vineyard surface soils. To understand the potential influence of Cu on the fate of Pys in the soil {3., we selected two Pys, cypermethrin （CPM） and lambda-cyhalothrin （A-CHT）, and two typical Chinese vineyard soils, Haplic Acrisol and Luvic Phaeozem, as experimental samples. The dissipation experiment was conducted at room temperature in the dark, and the transport of both Pys through the soils was investigated using soil thin-layer chromatography. The results showed that the transport of Pys in both soils increased as the Cu2＋ concentration increased from 0 to 100 mg L-1, and Pys were more transportable in Haplic Acrisol （HA） than in Luvic Phaeozem （LP） under the same experimental conditions. For CPM, only 100 mg L-1 of Cu2＋ significantly （P 〈 0.05） increased Pys transport through both soils relative to water. Lambda-CHT was significantly （P〈0.05） transported through HA by all the Cu2＋ concentrations compared to water, and all but the 1 mg L-1 of Cu2＋ significantly （P 〈 0.05） increased the transport of A-CHT through LP relative to water. However, the dissipation rates of CPM and λ-CHT decreased with the addition of Cu to soils. Our findings suggest that the risk of groundwater contamination by Pys increases in the soils with elevated Cu concentrations.

关键词： Haplic Acrisol Luvic Phaeozem potential ecological risk pyrethroid insecticides soil thin-layer chromatography

黄孢原毛平革菌对氯代蒽的生物降解及降解途径

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环境化学 2019年第7期38卷 1636-1644页

作者：马涛原文婷彭英高占啟孙成何欢杨绍贵张利民南京师范大学环境学院南京210023 南京大学环境学院污染控制与资源化研究国家重点实验室南京210023 江苏省环境监测中心南京210036

氯代多环芳烃(chlorinated polycyclic aromatic hydrocarbons, Cl-PAHs)是多环芳烃的氯代衍生物,其毒性与母体相当甚至高于母体,在各种环境介质中广泛存在且难以降解,对生态环境和人类健康具有一定的潜在威胁.微生物降解是环境中去除... 详细信息

氯代多环芳烃(chlorinated polycyclic aromatic hydrocarbons, Cl-PAHs)是多环芳烃的氯代衍生物,其毒性与母体相当甚至高于母体,在各种环境介质中广泛存在且难以降解,对生态环境和人类健康具有一定的潜在威胁.微生物降解是环境中去除有机物的主要途径之一,本文以白腐真菌的模式菌种-黄孢原毛平革菌(Phanerochaete chrysosporium, Pc)为代表,优化了Pc菌对氯代蒽的降解条件、探究了降解效果以及降解动力学,并分析了可能的降解途径.结果表明,Pc菌对氯代蒽有一定的降解能力.当液体培养基的初始pH值为4.5,Pc菌接种量约为每毫升1×105个时,在3.℃,120 r·min-1的恒温摇床中培养6 d后,接入浓度为100 mg·L-1的底物能够达到较高的降解效率.在此条件下降解16 d后9-ClAnt和9,10-Cl2Ant的降解率分别达到了96.45%和92.83..动力学分析表明,Pc菌降解氯代蒽的过程符合一级动力学方程.分析降解过程,检测到5种降解中间产物,结合生物催化反应的特点推测了氯代蒽可能的降解途径.

关键词：氯代多环芳烃氯代蒽黄孢原毛平革菌生物降解降解途径

环境中硝基多环芳烃的污染现状及其毒性效应研究进展

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环境化学 2020年第9期39卷 2430-2440页

作者：马涛孔继婕韩孟书何欢孙成杨绍贵李时银南京师范大学环境学院南京210023 南京大学环境学院污染控制与资源化研究国家重点实验室南京210023

硝基多环芳烃(nitrated polycyclic aromatic hydrocarbons,NPAHs)是一类通过硝基取代的多环芳烃的衍生物,比母体多环芳烃具有更强的致突变、致癌、致畸毒性,并且广泛存在于各种环境介质中,对生态环境和人类健康具有潜在的危害和影响.... 详细信息

硝基多环芳烃(nitrated polycyclic aromatic hydrocarbons,NPAHs)是一类通过硝基取代的多环芳烃的衍生物,比母体多环芳烃具有更强的致突变、致癌、致畸毒性,并且广泛存在于各种环境介质中,对生态环境和人类健康具有潜在的危害和影响.又因其具有持久性和长距离迁移性,所以近年来受到研究者的广泛关注.本文基于当前国内外对环境中NPAHs的研究,系统的综述了NPAHs的环境赋存、来源、毒性效应及其健康风险评价,深入探讨了不同环境介质中的污染现状与来源.最后提出了现有研究的不足,并对NPAHs今后的研究方向进行了展望.

关键词：硝基多环芳烃环境赋存来源毒性效应健康风险评价

改性淀粉絮凝剂链结构形态对石材废水絮凝性能的影响

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环境化学 2024年第8期43卷 2811-2821页

作者：王禹洋罗章程智涵章龙管毕皓石鸿韬陈炜刁鹏胡潘杨琥南京大学环境学院污染控制与资源化研究国家重点实验室南京210023 中铁工程服务有限公司成都610083

石材废水具有高浊度特征,混凝/絮凝工艺是降浊净水的有效手段.本研究以绿色环保且价格低廉的天然高分子材料淀粉为原材,分别通过醚化和接枝共聚技术,合成了两种电荷密度相近,但链结构形态与电荷分布不同的阳离子改性淀粉絮凝剂:3.氯-2-... 详细信息

石材废水具有高浊度特征,混凝/絮凝工艺是降浊净水的有效手段.本研究以绿色环保且价格低廉的天然高分子材料淀粉为原材,分别通过醚化和接枝共聚技术,合成了两种电荷密度相近,但链结构形态与电荷分布不同的阳离子改性淀粉絮凝剂:3.氯-2-羟丙基三甲基氯化铵改性淀粉(St-CTA,直链型)和淀粉接枝共聚丙烯酰胺-聚甲基丙烯酰氧乙基三甲基氯化铵(St-g-PAM-co-PDMC,接枝型).以泉州某石材加工厂废水为研究对象,详细考察并比较了两种阳离子改性淀粉絮凝剂对石材废水的絮凝性能,同时结合絮凝后上清液zeta电位、絮体结构的动态监测结果以及扩展DLVO理论等,探究其絮凝机理.研究结果表明,两种改性淀粉絮凝剂均表现出优于传统无机混凝剂聚合氯化铝的絮凝性能;除高效降低水体浊度,其对COD、氨氮、总磷及总氮均具有一定去除效果;改性淀粉絮凝剂絮凝过程主要是电中和与黏结架桥作用协同作用的结果.此外,St-g-PAM-co-PDMC由于具有丰富的接枝链结构,且阳离子基团随机分布在接枝链上,具有较高的阳离子基团利用效率及电中和混凝效果,表现出优于直链型St-CTA的除浊效果,具有较低的絮凝剂投加量、较大的絮体尺寸、较快的絮体生长速度、较高的絮体强度及更佳的破碎后絮体恢复性能.扩展DLVO理论结果也表明,St-g-PAM-co-PDMC的总相互作用低于St-CTA,有着更为高效的电中和混凝作用及降浊效果.两种电荷密度相近的改性淀粉絮凝剂絮凝性能的差异主要是由于其不同的链结构与电荷分布造成的,但其均具有优良的降浊净水效果及绿色环保等显著特征,其在石材废水等行业废水处理中应有着良好的应用前景.

关键词：石材废水阳离子改性淀粉絮凝剂链结构絮凝性能絮体性质扩展DLVO理论絮凝机制

维普期刊数据库博看期刊

Linkages of volatile fatty acids and polyhexamethylene guanidine stress during sludge fermentation:Metagenomic insights of microbial metabolic traits and adaptation

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Chinese Chemical Letters 2023年第6期34卷 172-177页

作者： Feng Wang Wei Du Wenxuan Huang Shiyu Fang Xiaoshi cheng Leiyu Feng Jiashun Cao Jingyang Luo yang Wu key laboratory of Integrated Regulation and resource Development on Shallow Lakes Ministry of EducationHohai UniversityNanjing 210098China College of environment Hohai UniversityNanjing 210098China state key laboratory of {3. control and resource reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

The massive use of polyhexamethylene guanidine(PHMG),as a typical bactericidal agent,raised environmental concerns to the *** work comprehensively revealed the hormesis effects of PHMG occurred in waste activated sludge(WAS)on the generation of volatile fatty acids(VFAs)during anaerobic *** low level of PHMG(100 mg/g TSS)significantly promoted the VFAs generation(1283.mg COD/L,compared with 3.7 mg COD/L in the control)via synchronously facilitating the solubilization,hydrolysis,and acidification steps but inhibiting *** analysis showed that the functional anaerobe(i.e.,Bacteroides,Macellibacteroide and Parabacteroide)and corresponding genetic expressions responsible for extracellular hydrolysis(i.e.,clp P),membrane transport(i.e.,ffh and gsp F),intracellular substrates metabolism(i.e.,ald and paa F)and VFAs biosynthesis(i.e.,ACACA and FASN)were enhanced in the optimal presence of ***,the anaerobic species could respond and adapt to low PHMG stimuli via quorum sensing(i.e.,cqs A,rpf C and rpf G),and thus maintain the high microbial metabolic ***,they were unable to tolerate the toxicity of excessive PHMG,resulting in the extremely low VFAs *** work enlightened the effects of emerging pollutants on WAS fermentation at the genetic levels,and provided guidance on the WAS treatment and resource recovery.

关键词： Polyhexamethylene guanidine(PHMG) Waste activated sludge(WAS) Volatile fatty acids(VFAs) Metabolic pathways Adaptive mechanisms

A Multi-Stage Green Barrier Strategy for the control of Global SARS-CoV-2 Transmission via Cold Chain Goods

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Engineering 2022年第2期8卷 13-16页

作者： Xu he Xinwang Liu Pan Li Panpan Wang Haijun cheng Wenqian Li Boda Li Ting Liu jun Ma state key laboratory of Urban Water {3. and environment Harbin Institute of TechnologyHarbin 150090China state key laboratory of {3. control and resource reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China

*** object-to-human transmission route of SARS-CoV-2 At the time of writing,coronavirus disease 2019(COVID-19),which is caused by the severe acute respiratory syndrome coron-avirus 2(SARS-CoV-2),has been a global pandemic for more than a *** of 22 September 2021,the global cumulative incidence exceeds 229 million cases,and the number of deaths has exceeded 4.75 million[1].The current situation of epidemic prevention and control within the countries around the world can be roughly divided into two stages:the pandemic stage that the United states,the United Kingdom,and India are still experiencing(as of 23.September 2021,newly reported cases in the last 24 h in the United states,United Kingdom,and India are 202840,3.095,and 26964,respectively[1]);and the normalized epidemic pre-vention and control stage that countries such as china and New Zealand are currently in.

关键词： prevention Strategy Chain

Purified terephthalic acid wastewater biodegradation and toxicity

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Journal of environmental Sciences 2005年第5期17卷 876-880页

作者： ZHANG Xu-xiang WAN Yu-qiu cheng Shu-pei sun Shi-lei ZHU cheng-{3.n LI Wei-xin ZHANG Xiao-chun WANG Gui-lin LU Jian-hua LUO Xiang GU Ji-dong The state key {3. of pollution control and resource reuse School of Environment Nanjing University Nanjing 210093 China yangtze Petrochemical Corporation Nanjing 210048 China Department of Ecology and Biodiversity The University of Hong Kong SAR China

The biodegradation and toxicity of the purified terephthalic acid（PTA） processing wastewater was researched at NJYZ pilot with the fusant strain Fhhh in the carrier activated sludge process（ CASP）. Sludge loading rate（SLR） for Fhhh to COD of the wastewater was 1.09 d^-1 and to PTA in the wastewater was 0.29 d^-1. The results of bioassay at the pilot and calculation with software Ebis3.showed that the 48h-LC50 （median lethal concentration） to Daphnia magna for the PTA concentration in the wastewater was only 1/10 of that for the chemical PTA. There were .5 kinds of benzoate pollutants and their toxicities existing in the wastewater at least. The toxicity parameter value of the pure chemical PTA cannot be used to predicate the PTA wastewater toxicity. The toxicity of the NJYZ PTA wastewater will be discussed in detail in this paper.

关键词： fusant strain purified terephthalic acid wastewater biodegradation toxicity software

Mechanisms of allicin exposure for the sludge fermentation enhancement:Focusing on the fermentation processes and microbial metabolic traits

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Journal of environmental Sciences 2022年第5期34卷 253-264页

作者： Feng Wang Jingyang Luo Shiyu Fang Wenxuan Huang Yunqi Zhang Le Zhang Xiaoshi cheng Wei Du Fang Fang Jiashun Cao yang Wu key laboratory of Integrated Regulation and resource Development on Shallow Lakes Ministry of EducationHohai UniversityNanjing 210098China College of environment Hohai UniversityNanjing 210098China state key laboratory of {3. control and resource reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

As a frequently used product with antimicrobial activity,consumed allicin might be dis-charged and concentrated in waste-activated sludge(WAS).However,the influence of al-licin(as an exogenous pollutant)on WAS fermentation has not been clearly *** study aimed to disclose the impacts of allicin on volatile fatty acid(VFA)generation dur-ing WAS *** results showed that the appropriate presence of allicin(10 mg/g TSS)significantly enhanced the VFA yield(1894 versus 575 mg COD/L in the control)with increased acetate proportion(24.3.).Further exploration found that allicin promoted WAS solubilization,hydrolysis and acidification *** analysis revealed that the key genes involved in extracellular hydrolysis metabolism(i.e.,CAZymes),mem-brane transport(i.e.,gtsA and ytfT),substrate metabolism(i.e.,yhdR and pfkC)and fatty acid synthesis(i.e.,accA and accD)were all highly *** also induced the bacteria to produce more signalling molecules and regulate cellular functions,thereby enhancing the microbial adaptive and regulatory capacity to the unfavourable ***,the variations in fermentative microbes and their contributions to the upregulation of func-tional genes(i.e.,ytfR,gltL,INV,iolD and pflD)for VFA generation were ***,the simultaneous stimulation of functional microbial abundances and metabolic activities contributed to VFA production in allicin-conditioned reactors.

关键词： Allicin Waste activated sludge(WAS) Anaerobic fermentation Metagenomic analysis Functional genes

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Chinese Chemical Letters 2023年第4期34卷 396-401页

作者： Jingyang Luo Yuxiao Li Wenxuan Huang Feng Wang Shiyu Fang Xiaoshi cheng Qian Feng Fang Fang Jiashun Cao yang Wu key laboratory of Integrated Regulation and resource Development on Shallow Lakes Ministry of EducationHohai UniversityNanjing 210098China College of environment Hohai UniversityNanjing 210098China state key laboratory of {3. control and resource reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

The distinct influences of cephalosporins(CEPs, i.e., cefamandole nafate and cefpirome sulfate) affiliated to different generations on the volatile fatty acids(VFAs) production and antibiotic resistance genes(ARGs) fates during waste activated sludge(WAS) fermentation were unveiled. The presence of CEPs mainly exhibited negative effects on the total VFAs production(5%–15% reduction), especially the cefamandole nafate, which is quite different to previous understanding. Further investigation revealed that the CEPs contributed to the solubilization and hydrolysis but inhibited the acidification process by affecting the functional microbial populations(i.e., Tissierella) and general microbial metabolic activities(i.e., pyruvate metabolism and VFAs biosynthesis). In addition, CEPs(especially the cefpirome sulfate)caused the propagation of ARGs(i.e., bla TEM, tet X and mex F) during WAS fermentation. CEPs enhanced the cell membrane permeability to promote the antibiotics mechanism of efflux pump and the horizontal transfer of ARGs. Also, the CEPs altered the regulatory systems(i.e., two component system) and microbial populations associated with ARGs, resulting in the proliferation of specific ARGs. Overall, the dissimilarity of different CEPs impacts on the WAS fermentation for VFAs production and ARGs variations enlightened the diverse environmental behaviors of anthropogenic pollutants and evoked the caution of ecological risks.

关键词： Wasteactivated sludge(WAS) Cephalosporins(CEPs) Volatilefattyacids(VFAs) Antibiotic resistancegenes(ARGs) Geneticexpressions