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Journal of Environmental Sciences 2023年第6期128卷 1-11页

作者： Qiuyue Zhang Meng Gao Xinhui sun Yu Wang Chaolei Yuan hongwen sun MOE Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai UniversityTianjin 300350China School of Agriculture Sun Yat-sen UniversityShenzhen 518107China

Soil contamination by polycyclic aromatic hydrocarbons(PAHs)has raised great environmental concerns.However,the information on national wide distribution of PAHs in soil as well as their effect on soil bacterial community are limited.In this study,16 PAHs weremeasured in 94 soil samples collected across China.The total concentration of 16 PAHs(PAHs)in soil ranged from 74.0 to 17,657 ng/g(dry weight basis),with a median value of 200 ng/g.Pyrene was themajor soil PAH,with amedian concentration of 71.3 ng/g.Soil samples from Northeast China had a higher median concentration ofPAHs(1,961 ng/g)than those from other regions.Petroleum emission and wood/grass/coal combustion were potential sources for soil PAHs based on diagnostic ratios and positive matrix factors analysis.A nonnegligible ecological risk(hazard quotients>1)was found in over 20%of soil samples analyzed and the highestmedian total HQs value(8.53)was found in soils from Northeast China.The effect of PAHs on bacterial abundance,α-diversity,andβ-diversity was limited in the soils surveyed.Nevertheless,the relative abundance of some members in genera Gaiella,Nocardioides,and Clostridium was significantly correlated with the concentrations of some PAHs.Especially,the bacterium Gaiella Occulta showed potential in indicating soil contamination by PAH,which is worth further exploration.

关键词： PAHs Soil Source analysis Bacterial community

Chemical oxidation of arsenic in the environment and its application in remediation: A mini review

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Pedosphere 2023年第1期33卷 185-193页

作者： Chaolei YUAN Qi LI Zhaoyang sun Wenjun ZHANG Jiangrong CHEN Zheng CHEN Shuo NA hongwen sun Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China The Institute of Seawater Desalination and Multipurpose Utilization Ministry of Natural ResourcesTianjin 300192China Department of Health and Environmental Sciences Xi’an Jiaotong-Liverpool UniversitySuzhou 215123China

Arsenic(As)contamination in soil and water poses a serious threat to the ecosystem health and human beings,and is of widespread concern.The main As species found in soil and water are arsenite As(Ⅲ)and arsenate As(V).Because As(Ⅲ)is more toxic and often more mobile than As(Ⅴ),many remediation strategies aim to oxidize As(Ⅲ)to As(Ⅴ).In the environment,the reduction of As(Ⅴ)under anaerobic conditions is mainly mediated by microorganisms,but the oxidation of As(Ⅲ)under aerobic conditions can be mediated primarily by chemical processes.This article first reviews the existing knowledge on chemical oxidation of As(Ⅲ)in the environment,with an emphasis on the roles of iron(Fe)and manganese(Mn)oxides.The application of Fe and Mn oxides for the remediation of As-contaminated soil and water is then summarized.The oxidation of As(Ⅲ)by oxygen is very slow in the absence of catalysts.Many Mn oxides,on the other hand,can efficiently oxidize As(Ⅲ).Although the oxidation of As(Ⅲ)by Fe(Ⅲ)is also slow,this process can be accelerated by light or Fe(Ⅱ).Iron and Mn oxides are widely used for the remediation of As-contaminated soil and water,with Fe oxides generally acting as absorbents while Mn oxides as oxidants.To better understand and regulate As transformation and transport in the environment,further study is needed on the mechanisms and influencing factors of As(Ⅲ)oxidation by Fe and Mn oxides,and the development of innovative methods and materials based on Fe and Mn oxides are desired.

关键词： As contamination iron oxide manganese oxide soil water

Effects of natural organic matter on cadmium mobility in paddy soil: A review

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Journal of Environmental Sciences 2021年第6期33卷 204-215页

作者： Chaolei Yuan Qi Li Zhaoyang sun hongwen sun Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China

Cadmium(Cd) contamination in paddy soil has caused public concern. The uptake of Cd by rice plants depends on soil Cd mobility, which is in turn substantially influenced by organic matter(OM). In this review, we first summarize the fate of Cd in soil and the role of OM. We then focus on the effects of OM on Cd mobility in paddy soil and the factors influencing the remedial effectiveness of OM amendments. We further discuss the performance of straw incorporation in the remediation of Cd-contaminated paddy soils reported in laboratory and field studies. Considering the huge production of organic materials(such as straw) in agriculture, the use of natural OM for soil remediation has obvious appeal due to the environmental benefits and low cost. Although there have been successful application cases, the properties of OM amendments and soil can significantly affect the remedial performance of the OM amendments. Importantly, straw incorporation alone does not often decrease the mobility of Cd in soil or the Cd content in rice grains. Careful evaluation is required when considering natural OM amendments, and the factors and mechanisms that influence their remedial effectiveness need further investigation in paddy soil with realistic Cd concentrations.

关键词： Cadmium Mobility Organic matter Paddy soil Remediation

Biodegradation of pyrene by Phanerochaete chrysosporium and enzyme activities in soils:Effect of SOM,sterilization and aging

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Journal of Environmental Sciences 2014年第5期26卷 1135-1144页

作者： Cuiping Wang hongwen sun Haibin Liu Baolin Wang MOE Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and Engineering Nankai University

The impacts of soil organic matter （SOM）, aging and sterilization on the production of lignin peroxidase （LIP） and manganese peroxidase （MnP） by Phanerochaete chrysosporium during the biodegradation of pyrene in soils were investigated. The biodegradation of pyrene by P. chrysosporium decreased with increasing SOM content, whereas the maximum activities of LiP and MnP increased, which indicates that SOM outweighed pyrene in controlling enzyme production. Sterilization enhanced the degradation of pyrene due to the elimination of competition from indigenous microbes, whereas aging led to a reduction in the degradation of pyrene primarily through changes in its sorbed forms. Both sterilization and aging could reduce SOM content and alter its structure, which also influenced the bioavailability of pyrene and the enzyme activity. The sterilization and aging processes caused changes in the degradation of pyrene, and the enzyme activities were greater in soils with high SOM contents. MnP was related to the degradation of pyrene to a greater extent, whereas LiP was more related to the decomposition of SOM.

关键词： biodegradation Phanerochaete chrysosporium enzyme activities soil organic matter sterilization aging

Insights into Free and Conjugated Forms of Neonicotinoid Insecticides in Human Serum and Their Association with Oxidative Stress

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Environment & Health 2023年第2期1卷 121-129页

作者： Ya-Nan Yao Shiming Song Yingyan Huang Kurunthachalam Kannan hongwen sun Tao Zhang School of Environmental Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China School of Chemistry and Environment Jiaying UniversityMei Zhou 514015China Guangzhou Hexin Instrument Co. Ltd.Guangzhou 510530China Wadsworth Center New York State Department of HealthAlbanyNew York 12137United States MOE Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai UniversityTianjin 300071China

Following exposure,neonicotinoid insecticides(NEOs)can be metabolized by both Phase Ⅰ and Phase Ⅱ reactions catalyzed by human cytochrome P450 enzymes.However,toxicities of parent NEOs and their metabolites are still unclear,and little is known about biotransformation rates and pathways of NEOs in humans.In this study,98 serum samples collected in China were analyzed for free,conjugated and total forms of six parent NEOs(i.e.,acetamiprid(ACE),imidacloprid(IMI),clothianidin(CLO),thiacloprid(THD),thiamethoxam(THM),and dinotefuran(DIN))and four metabolites(i.e.,N-desmethyl-acetamiprid(N-dm-ACE),1-methyl-3-(tetrahydro-3-furylmethyl)(DIN-U),5-hydroxy-imidacloprid(5-OH-IMI),olefin-imidacloprid(Of-IMI)).NEOs and their metabolites were detected in all serum samples,and the total median concentrations of free,conjugated,and total forms of 10 NEOs were 2.04,2.01,and 5.12 ng/mL,respectively.Conjugated forms of NEOs accounted for only half(53%)of the total forms of NEOs.Based on the profiles of Phase Ⅰ and Phase Ⅱ metabolites of NEOs in serum,it was found that age is a determinant in Phase Ⅰmetabolism of DIN and Phase Ⅱ metabolism of IMI.The Phase Ⅱmetabolites of NEOs are associated with oxidative DNA damage,and the conjugated forms of IMI,DIN,and 5-OH-IMI in serum were significantly positively correlated with oxidative stress.Overall,the amount of NEOs present in conjugated forms in human serum was determined to document the existence of a considerable proportion of free forms of these insecticides.

关键词： Neonicotinoid insecticides metabolites conjugated forms free forms oxidative stress human serum

Arsenic and chromate removal from water by iron chips-Effects of anions

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Frontiers of Environmental Science & Engineering 2008年第2期2卷 203-208页

作者： Ruihua ZHANG hongwen sun Jin YIN College of Environmental Science and Engineering Nankai UniversityTianjin 300071China College of Science Tianjin University of Science and TechnologyTianjin 300222China

The purpose of this study is to estimate the removal efficiency of As and Cr(VI)by one kind of industrial waste–iron chips,as well as to estimate the effects of typical inorganic anions(sulfate,phosphate,and nitrate),and typical organic anions(citrate,oxalate,and humate)on As or Cr(VI)removal.The results showed that 98%of As(V)and 92%of As(III)could be removed from aqueous phase by the iron chips within 60 min.Compared with As species,Cr(VI)was removed much more rapidly and efficiently with 97%of Cr(VI)being removed within 25 min.The removal efficiency for arsenic was in the order:As(III)(sulfate),As(III)(nitrate)or As(III),As(III)(humate),As(III)(oxalate),As(III)(citrate),As(III)(phosphate),and for chromate was in the order:Cr(VI)(sulfate),Cr(VI)(phosphate)or Cr(VI)(nitrate)or Cr(VI)(oxalate),Cr(VI),Cr(VI)(citrate),Cr(VI)(humate).In all the treatments,pH level increased with time except for As(III),the removal of which was either without anions or in the presence of humate or nitrate.

关键词： arsenic chromate iron chips permeable reactive barrier remediation groundwater

Low temperature H_2S sensor based on copper oxide/tin dioxide thick film

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Journal of Natural Gas Chemistry 2010年第4期19卷 393-396页

作者： Hongbing Wei hongwen sun Sumei Wang Guangzhi Chen Yingtao Hou hongwen Guo Xiaodong Ma Tianjin Key Laboratory of Environmental Remediation and Pollution Control Key Laboratory of Environmental Pollution Process and Standard Ministry of Education College of Environmental Science and Engineering Nankai University Tianjin 300071 China Chemicals Minerals ＆ Metallic Materials Inspection Centre of Tianjin Entry-Exit Inspection and Quarantine Bureau Tianjin 300456 China

Nanostructured tin dioxide （SnO2） powders were prepared by a sol-gel dialytic process and and the doping of CuO on it was completed by a deposition-precipitation method.The thick film sensors were fabricated from the CuO/SnO2 polycrystalline powders.Sensing behavior of the sensor was investigated with various gases including CO,H2,NH3,hexane,acetone,ethanol,methanol and H2S in air.The as-synthesized gas sensor had much better response to H2S than to other gases.At the same time,the CuO/SnO2 sensor had enough sensitivity,together with fast response and recovery,to distinguish H2S from those gases at 160 and 210 ℃.Therefore,it might have promising applications in the future.

关键词： low-temperature H2S copper oxide/tin dioxide gas sensors selectivity

The effect of capping with natural and modified zeolites on the release of phosphorus and organic contaminants from river sediment

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Frontiers of Chemical Science and Engineering 2011年第3期5卷 308-313页

作者： Shujuan sun Lei WANG Suiliang HUANG Teng TU hongwen sun College of Resources and Environment Shandong Agricultural UniversityTaian 271018China Key Laboratory of Pollution Processes and Environmental Criteria(Ministry of Education) Nankai UniversityTianjin 300071China

A microcosm system that included river sediment,water and different zeolite capping materials(natural zeolite,surfactant-modified zeolite(SMZ),or aluminum modified zeolite(AMZ))was designed to study the effect of capping on the release of phosphorus and three organic pollutants(phenol,pyridine,and pyrene)from the sediment to the overlying water over the course of three month.For the same amount of the three capping materials,the efficiency of phosphorus inactivation was in the order of SMZ>AMZ>natural zeolite.The inactivation of phosphorus was mainly caused by the covering effect,co-precipitation and adsorption by the capping materials.The different zeolites gave different results for the release of phenol,pyridine,and pyrene from the sediment.When natural zeolite was used as the capping material,there was no effect on the release of pyrene and pyridine,whereas capping the sediment with SMZ or AMZ inhibited the release of pyrene and pyridine but to different extents.However,for controlling the release of phenol from the sediment,aluminum modified zeolite was the most efficient material,whereas no effects were observed when natural zeolite or SMZ were used.The different capabilities of the zeolite materials for controlling the release of different organic pollutants are related to the differences in the electrical properties of these pollutants.

关键词： sediment capping natural zeolite modified zeolite phosphorus

阴离子交换树脂对典型及新型全氟/多氟烷基酸的吸附去除

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科学通报 2024年第14期69卷 1934-1944页

作者：李霞曹溢方博张连营陈浩孙红文天津理工大学环境科学与安全工程学院天津300384 南开大学环境科学与工程学院教育部环境污染过程与基准重点实验室天津300350

全氟/多氟烷基酸类物质(PFAAs)作为一类优良的表面活性剂被广泛应用于纺织、半导体和航天等多种商业和工业领域,造成了水体中PFAAs的严重污染.常规饮用水处理工艺如絮凝、高级氧化等不能有效去除PFAAs,而离子交换树脂仅能去除传统的长链... 详细信息

全氟/多氟烷基酸类物质(PFAAs)作为一类优良的表面活性剂被广泛应用于纺织、半导体和航天等多种商业和工业领域,造成了水体中PFAAs的严重污染.常规饮用水处理工艺如絮凝、高级氧化等不能有效去除PFAAs,而离子交换树脂仅能去除传统的长链PFAAs,对于短链替代物C4 PFAAs和全/多氟醚羧酸的去除效果仍然未知.因此,本研究选取不同链长和官能团的PFAAs,探究不同结构PFAAs的吸附动力学特征,以及树脂性质和水化学条件(溶液pH、共存污染物、无机盐离子)对阴离子交换树脂(AERs)吸附去除不同结构PFAAs的影响特征及关键控制因素.结果表明, PFAAs在大孔AERs(A860)上的吸附速率更快,而凝胶型高憎水性的聚苯乙烯基树脂(A600)对PFAAs的吸附容量和去除率更高. PFAAs链长及官能团的电负性对其吸附速率和去除率均有较大影响:相同碳链长度下,全氟磺酸(PFSAs)>全氟羧酸(PFCAs).对于含有相同官能团的PFAAs,短链PFAAs的吸附速率高于长链PFAAs.溶液pH对PFAAs在树脂上的吸附影响较小.短链PFAAs在AERs上的吸附主要受离子交换作用控制,易受无机盐离子干扰.憎水性较强的PFAAs在树脂上的吸附除静电作用外,主要受憎水性分配的控制.常规的AERs难以有效去除水体中亲水性较强的短链PFCAs(C<4)和全氟醚羧酸(如GenX),因此这些新型PFAAs替代物给未来的水处理工作带来了极大挑战.

关键词：全氟/多氟烷基酸短链全氟烷基酸离子交换树脂竞争吸附

Sorption and degradation of imidacloprid and clothianidin in Chinese paddy soil and red soil amended with biochars

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Biochar 2020年第3期2卷 329-341页

作者： Peng Zhang Lujuan Min Jingchun Tang Muhammad Khalid Rafiq hongwen sun MOE Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai University38#Tongyan RoadHaihe Education ParkJinnan DistrictTianjin 300350China Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation Tianjin 300350China Rangeland Research Institute National Agricultural Research CenterIslamabad 44000Pakistan

Application of biochar technology in the remediation of organic contaminated soils has drawn growing interest in recent years.In this study,sorption and degradation of two typical neonicotinoid insecticides,imidacloprid(IMI)and clothianidin(CLO)in Chinese typical paddy soil and red soil amended with six kinds of biochars were investigated.The results showed that surface area(SA),pH,total organic carbon and dissolved organic carbon(DOC)of the two soils all increased after biochar amendment,while H/C decreased.With biochar pyrolyzing temperature(PT)increasing from 300℃ to 700℃,the sorption of the two insecticides on biochar-soil mixtures increased by more than 4.3-fold,due to the increasing SA and decreasing H/C.The acidic pH of the two tested soils also favored the enhanced sorption of the insecticides by removing the ash on biochar.The amendment of low-PT(300℃)biochar promoted the biodegradation of IMI and CLO by 11.3-41.9%via providing more DOC and available N for microorganisms,while inhibiting the chemical degradation.Oppositely,the high-PT(500-700℃)biochars inhibited the biodegradation of the insecticides by decreasing their bioavailability and promoted the chemical degradation by providing mineral active groups,and generating·OH and other free radicals.In addition,soil type also affected the effects of biochar remediation.The highest 60-day degradation extent was achieved for CLO(90.5%)and IMI(81.4%)in paddy soil by adding biochar derived from pig manure at 700℃ PT.In summary,the effect of biochar on the fate of organic contaminants in soil is a comprehensive result involving several processes and a systematic study considering the type and property of biochar and soil is needed to optimize biochar technology.

关键词： Biochar Soil Sorption Degradation Imidacloprid Clothianidin