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Frontiers of environmental Science & engineering 2014年第2期8卷 215-225页

作者： Hailiang SONG Xianning LI Wei LI Xiwu LU School of Energy and Environment Southeast University Nanjing 210096 China engineering research center for water environmental protection of taihu lake Southeast University Wuxi Branch Wuxi 214135 China

A novel floating-bed incorporated with water spinach （Ipomoea aquatica）, Asiatic clam （Corbicula fluminea）, and carrier media supported biofilm was developed for eutrophic water purification. The contribu- tions of each biologic component to the removals of total nitrogen （TN）, total phosphorus （TP） and Chl.a were examined. The nutrient removals due to the direct uptake by either water spinach or Asiatic clam were less than 10%, suggesting a negligible role of biologic assimilation and leaving the biofilm as the indispensable biologic compo- nent in the floating-bed. Chl.a was reduced mainly by Asiatic clams via filter-feeding. Meanwhile, the digestion and excretion of Asiatic clams benefited the proliferation of nitrifying and denitrifying bacteria, resulting in the improvement of TN removal. In summary, the synergetic effects of water spinach, Asiatic clams and biofilms would promote the eutrophic water treatment performance of floating-bed in comparison with the conventional floating- bed with vegetation as the single biologic component.

关键词： floating-bed Corbicula fluminea biofilm cartier eutrophication

Seasonal and spatial distributions of euphotic zone and longterm variations in water transparency in a clear oligotrophic lake Fuxian, China

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Journal of environmental Sciences 2018年第10期30卷 185-197页

作者： Qichao Zhou Yunlin Zhang Kaidi Li Licheng Huang Fengle Yang Yuanyang Zhou Junjun Chang taihu Laboratory for lake Ecosystem research State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Yunnan Key Laboratory of Pollution Process and Management of Plateau lake-watershed Yunnan Institute of Environmental Science(Kunming China International Research Center for Plateau Lake) School of Ecology and environmental Science Yunnan University

To assess the seasonal and spatial variations and long-term trends in water optical properties in lake Fuxian, investigations based on field work in four seasons and a long-term analysis of data from 1980 to 2014 were conducted. The results show that there was no significant variation in the euphotic depth（Z（eu）） across the four seasons, and no significant correlations between Z（eu） and potential influencing factors in seasons other than summer, suggesting that the water itself may be a major factor regulating the Z（eu）in general. Nevertheless, significant differences in Z（eu） between the north region（NR） and the south region（SR） were observed in all seasonal tests except spring. This finding relates to a higher abundance of chromophoric dissolved organic matter（CDOM） in the NR due to runoff, especially in the rainy seasons（summer and autumn）.CDOM and its terrigenous component had an important impact on Z（eu）in summer, with the highest precipitation, and impacts from suspended solids and non-algal particles were also found in the NR in summer. The Secchi disk depth in the lake decreased clearly over the years,with significantly negative correlations with the increasing permanganate index and air temperature, implying that organic contaminants（CDOM and/or phytoplankton） are important regulators of water transparency. We estimate that the combined effects of climate warming and changes in land use and land cover are also indirect regulating factors. These findings should be considered in the protection of lake Fuxian, owing to the importance of light penetration in aquatic ecosystems.

关键词： Photosynthetic active radiation Diffuse attenuation coefficient Euphotic depth Secchi disk depth Chromophoric dissolved organic matter Yunnan-Guizhou Plateau

Denitrification and microbial community in MBBR using A. donax as carbon source and biofilm carriers for reverse osmosis concentrate treatment

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Journal of environmental Sciences 2019年第10期31卷 133-143页

作者： Li Li Guokai Yan Haiyan Wang Zhaosheng Chu Zewen Li Yu Ling Tong Wu State Key Laboratory of environmental Criteria And Risk As sessment Chinese Research Academy of Environmental SciencesBeijing 100012China engineering center for environmental Pollution Control Chinese Research Academy of Environmental SciencesBeijing 100012China National engineering Laboratory for lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China State environmental protection Key Laboratory for lake Pollution Control Chinese Research Academy of Environmental SciencesBeijing 100012China

In this study,raw Arundo donax(***)pieces were applied as carbon source and biofilm carriers for denitrification in a lab-scale moving bed biofilm reactor(MBBR)for the treatment of reverse osmosis concentrate gathered from local wastewater reuse *** stable phase(about 60 days),efficient denitrification performance was obtained with73.2%±19.5%NO3--N average removal and 8.10±3.45 g N/(m3·day)NO3--N average volumetric removal *** balance analysis showed that 4.84 g *** was required to remove 1 g *** real-time PCR analysis results showed that the copy numbers of 16S r-RNA,narG,nirS,nosZ and anammox gene of carrier biofilm and suspended activated sludge in the declination phase(BF2 and AS2)were lower than those of samples in the stable phase(BF1 and AS1),and relatively higher copy numbers of nirS and nirK genes with lower abundance of narG and nosZ genes were ***-throughput sequencing analysis was conducted for BF2 and AS2,and similar dominant phyla and classes with different abundance were *** class Gammaproteobacteria affiliated with the phylum Proteobacteria was the most dominant microbial community in both BF2(52.6%)and AS2(41.7%).The PICRUSt prediction results indicated that 33 predictive specific genes were related to denitrification process,and the relative abundance of 18 predictive specific genes in BF2 were higher than those in AS2.

关键词： Arundo donax carbon source Denitrification MBBR Reverse osmosis concentrate Nitrate removal Microbial community High-throughput sequencing

Control concept and countermeasures for shallow lakes’eutrophication in China

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Frontiers of environmental Science & engineering 2008年第3期2卷 257-266页

作者： Xiangcan JIN Shaoyong LU Xiaozhen HU Xia JIANG Fengchang WU State environmental protection Key Laboratory for lake Pollution Control Research Center of Lake EnvironmentChinese Research Academy of Environmental SciencesBeijing 100012China

research on lake eutrophication in China began in the early 1970s,and many lakes in China are now known to be in meso-eutrophic *** eutrophication has been showing a rapidly increasing trend since *** show that the main reasons for lake eutrophication include a fragile lake background environment,excessive nutrient loading into lakes,excessive human activities,ecological degeneration,weak environmental protection awareness,and lax lake *** mechanisms resulting from lake eutrophication include nutrient recycling imbalance,major changes in water chemistry(pH,oxygen,and carbon),lake ecosystem imbalance,and algal prevalence in *** concepts for controlling eutrophication should be persistently proposed,including lake catchment control,combination of pollutant source control with ecological restoration,protection of three important aspects(terrestrial ecology,lake coast zone,and submerged plant),and combination of lake management with *** to control lake eutrophication should include pollution source control(i.e.,optimize industrial structural adjustments in the lake catchment,reduce nitrogen and phosphorus emission amounts,and control endogenous pollution)and lake ecological restoration(*** a zone-lake buffer region and lakeside zone,protect regional vegetation,utilize hydrophytes in renovation technology);countermeasures for lake management should include implementing water quality management,identifying environmental and lake water goals,legislating and formulating laws and regulations to protect lakes,strengthening publicity and the education of people,increasing public awareness through participation in systems and mechanic innovations,establishing lake region management institutions,and ensuring implementation of governance and management measures.

关键词： China lake eutrophication control concept and countermeasures

Effects of overlying water aeration on phosphorus fractions and alkaline phosphatase activity in surface sediment

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Journal of environmental Sciences 2011年第2期23卷 206-211页

作者： Jianjun Chen Shaoyong Lu Yikun Zhao Wei Wang Minsheng Huang School of Resource and environmental Sciences East China Normal University Shanghai 200062 China State environmental protection Key Laboratory for lake Pollution Control Research Center of Lake Environment Chinese Research Academy of Environmental Sciences Beijing 100012 China Civil and Environment engineering School University of Science & Technology Beijing Beijing 100083 China

Microbial activity may influence phosphorus （P） deposit and release at the water sediment interface. The properties of DO （dissolved oxygen）, pH, P fractions （TE Ca-E Fe-R OE IP）, and APA （alkaline phospfiatase activity） at the water sediment interface were measured to investigate microbial activity variations in surface sediment under conditions of two-month intermittent aeration in overlying water. Results showed that DO and TP of overlying water increased rapidly in the first week and then decreased gradually after 15 day of intermittent aeration. Microorganism metabolism in surface sediment increased pH and decreased DO and TP in the overlying water. After two-month intermittent aeration, APA and OP from surface sediment （0-2 cm） were both significantly higher than those from bottom sediment （6-8 cm）（p 〈 0.05）, and surface sediment Fe-P was transferred to OP during the course of microorganism reproduction on the surface sediment. These results suggest that microbial activity and microorganism biomass from the surface sediment were higher than those from bottom sediment after two-month intermittent aeration in the overlying water.

关键词： aeration disturbance sediment phosphorus fractions alkaline phosphatase

N2O emission in partial nitritation-anammox process

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Chinese Chemical Letters 2020年第1期31卷 28-38页

作者： Li Li Yu Ling Haiyan Wang Zhaosheng Chu Guokai Yan Zewen Li Tong Wu State Key Laboratory of environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China engineering center for environmental Pollution Control Chinese Research Academy of Environmental SciencesBeijing 100012China National engineering Laboratory for lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China State environmental protection Key Laboratory for lake Pollution Control Chinese Research Academy of Environmental SciencesBeijing 100012China

Nitrous oxide(N2O)is one of the significant greenhouse gases,and partial nitritation-anammox(PNA)process emits higher N2O than traditional nitrogen removal processes.N2O production in PNA mainly occurs in three different pathways,i.e.,the ammonia oxidizing bacteria(AOB)denitrification,the hydroxylamine(NH2 OH)oxidation and heterotrophic denitrifiers denitrification.N2O emission data vary significantly because of the different operational conditions,bioreactor configurations,monitoring systems and quantitative *** the common operational parameter scopes of PNA,N2O emission via NH2 OH oxidation dominates at relatively low dissolved oxygen(DO),low inorganic carbon(IC),high pH or low N02-concentration,while N2O emission via AOB denitrification dominates at relative higher DO,higher *** pH or higher *** are highly enriched while nitriteoxidizing bacteria(NOB)are rarely found in partial nitritation process,and the order Nitrosomonadales of AOB is the dominant group and N2O *** bacteria,AOB and certain amount of heterotrophic denitrifying bacteria are observed in the anammox process,the genus Denitratisoma and the heterotrophic denitrifying bacteria in the deep layer of anammox granules are the dominant N2O generation *** one-stage PNA reactors,anammox bacteria account for a large fraction of the biomass,AOB account for small portion,and NOB account for even *** microbial community,diversity and N2O producers in one-stage PNA reactors are similar with those in two-stage PNA *** dominant anammox bacteria,AOB and NOB in PNA are the species Candidatus Brocadia,the genera of Nitrotoga,Nitrospira and Nitrobacter,and the genus Nitrosomonas,*** relations between N2O emission pathways and microbial communities need further study in the future.

关键词： N2O emission Greenhouse gas Partial nitritation-anammox N2O production mechanisms Influencing factors Microbial community

Contaminant removal from low-concentration polluted river water by the bio-rack wetlands

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Journal of environmental Sciences 2012年第6期24卷 1006-1013页

作者： Ji Wang Lanying Zhang Shaoyong Lu Xiangcan Jint Shu Gan Key Laboratory of Groundwater Resources and Environment Ministry of EducationJilin UniversityChangchun 130021China State environmental protection Key Laboratory for lake Pollution Control Engineering and Technology Center of LakeResearch Center of Lake EnvironmentChinese Research Academy of Environment SciencesBeijing 100012China College of Resources and Environment Hunan Agriculture UniversityChangsha 410128China

The bio-rack is a new approach for treating low-concentration polluted river water in wetland systems.A comparative study of the efficiency of contaminant removal between four plant species in bio-rack wetlands and between a bio-rack system and control system was conducted on a small-scale （500 mm length × 400 mm width × 400 mm height） to evaluate the decontamination effects of four different wetland *** was generally a significant difference in the removal of total nitrogen （TN）,ammonia nitrogen （NH 3-N） and total phosphorus （TP）,but no significant difference in the removal of permanganate index （COD Mn） between the bio-rack wetland and control ***-rack wetland planted with Thalia dealbata had higher nutrient removal rates than wetlands planted with other *** fine-root （root diameter 3 mm） biomass rather than total plant biomass was related to nutrient removal *** study suggested that the nutrient removal rates are influenced by plant species,and high fine-root biomass is an important factor in selecting highly effective wetland plants for a bio-rack *** to the mass balance,the TN and TP removal were in the range of 61.03-73.27 g/m^2 and 4.14-5.20 g/m^2 in four bio-rack wetlands during the whole operational *** N and P removal by plant uptake constituted 34.9%-43.81% of the mass N removal and 62.05%-74.81% of the mass P *** study showed that the nitrification/denitrification process and plant uptake process are major removal pathways for TN,while plant uptake is an effective removal pathway for TP.

关键词： bio-rack constructed wetland fine-root biomass low-concentration polluted river water plants uptake

Risk assessment and identification of factors influencing the historical concentrations of microcystin in lake taihu, China

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Journal of environmental Sciences 2023年第5期127卷 1-14页

作者： Chen Cheng Alan D.Steinman Kaiye Zhang Qi Lin Qingju Xue Xing Wang Liqiang Xie State Key Laboratory of lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Annis water Resources Institute Grand Valley State University740 West Shoreline DriveMuskegonMIUSA National engineering Laboratory for lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China State environmental protection Key Laboratory of Drinking water Source protection Chinese Research Academy of Environmental SciencesBeijing 100012China

Understanding the history of microcystins(MCs)pollution in large lakes can help inform future lake *** collected sediment cores from lake taihu to:investigate the long-term record of MCs(MC-LR,MC-YR,and MC-RR),explore the main environmental drivers of MCs,and assess their public health and ecological *** showed that MCs content in all cores increased over *** core from north taihu had the highest MC concentrations,with an average total MCs(sum of MC-LR,MC-YR,and MC-RR=TMCs)content of(74.31±328.55)ng/*** core from eastern taihu showed the lowest average TMCs content of(2.91±3.95)ng/*** showed that sediment MCs at the three sites were positively correlated with sediment ***-LR and MC-YR in northern and western taihu negatively correlated with both the sediment total organic carbon/sediment total nitrogen ratio(STOC/STN)andwater nitrate(NO_(3)^(−)-N)concentration,but three MC congeners at eastern taihu showed positive correlations with water orthophosphate(PO_(4)^(3−)-P),NO_(3)^(−)-N,and STOC/*** additive model analysis at each site revealed that NO_(3)^(−)-N was the main TMCs driver in northern andwestern taihuwhere phytoplankton dominated,whereasPO_(4)^(3−)-P was the main TMCs driver in eastern taihu where macrophytes *** the whole lake scale,total phosphorus(TP)andPO_(4)^(3−)-P were the most important environmental drivers influencing MCs;TP explained 47.4%,44.2%,and 47.6%while orthophosphate explained 34.8%,31.2%,and 34.7%of the deviance on TMCs,MC-LR,and MC-YR,***_(3)^(−)-N also showed a strong effect on MCs variation,especially on *** assess-ment showed that both ecological and public health risk has increased in recent *** conclude that while control of phosphorus and nitrogen input should be a major focus for future lake management,lake zone-specificmanagement strategiesmay also be important.

关键词： Microcystins Pollution history Orthophosphate Nitrate Risk assessment lake taihu

Concentration and source identification of polycyclic aromatic hydrocarbons and phthalic acid esters in the surface water of the Yangtze River Delta,China

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Journal of environmental Sciences 2012年第2期24卷 335-342页

作者： Lifei Zhang Liang Dong Lijun Ren Shuangxin Shi Li Zhou Ting Zhang Yeru Huang State environmental protection Key Laboratory of Dioxin Pollution Control National Research Center for Environmental Analysis and Measurement Beijing 100029 China

The pollution from polycyclic aromatic hydrocarbons（PAHs） and phthalic acid esters（PAEs） in the surface water of the rapidly urbanized Yangtze River Delta region was *** surface water samples were collected in June *** samples were liquid-liquid extracted using methylene chloride and analyzed by gas chromatography-mass *** of PAHs and PAEs ranged 12.9-638.1 ng/L and 61-28550 ng/L,***,naphthalene,pyrene,phenanthrene,di-2ethylhexyl phthalate,and di-n-butyl phthalate were the most abundant compounds in the *** water samples were moderately polluted with benzo[a]pyrene according to China＇s environmental quality standard for surface *** two highest concentrations of PAHs and PAEs occurred in samples from taihu lake,Wuxi City and the western section of Yangchenghu *** sources of pollution at S7 were petroleum combustion and the plastics industry,and at Yangchenghu lake were petroleum combustion and domestic *** in samples from the Beijing-Hangzhou Grand Canal originated from diesel *** were no obvious sources of pollution for the other water *** results can be used as reference levels for future monitoring programs of pollution from PAHs and PAEs.

关键词： polycyclic aromatic hydrocarbons phthalic acid esters Yangtze River Delta surface water

Mutual influence of copper and paraquat on their adsorption in soil

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Pedosphere 2023年第6期33卷 857-864页

作者： Huanhua WANG Zhiguo PEI Guangcai CHEN Baoshan XING National engineering Laboratory for lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China State environmental protection Key Laboratory for lake Pollution Control Chinese Research Academy of Environmental SciencesBeijing 100012China State Key Laboratory of environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China research Institute of Subtropical Forestry Chinese Academy of ForestryHangzhou 311400China Stockbridge School of Agriculture University of MassachusettsAmherst MA 01003USA

Paraquat and copper (Cu) are commonly used and detected in ***,it is important to understand their mobility in the *** this study,the competitive effects of paraquat and Cu on their adsorption in five representative Chinese soils were investigated using batch adsorption equilibrium experiments and spectroscopic *** results showed that the adsorption of paraquat in soil varied with soil type and was positively correlated with both soil cation exchange capacity and organic matter *** exerted a more remarkable suppression effect on the adsorption of Cu than Cu on the adsorption of *** the presence of 0.12 and 0.19 mmol L-1paraquat,Cu adsorption decreased by 16%and 22%in Heilongjiang soil and by 24%and37%in Jiangxi soil,*** the presence of 0.1 and 0.2 mmol L-1Cu,paraquat adsorption decreased by 4%and 8%in Heilongjiang soil and by15%and 19%in Jiangxi soil,*** selectivity involving symmetric cation (paraquat2+and Cu2+) exchange is the probable basis for the suppression *** ultraviolet-visible absorption experiments suggested that the formation of Cu-paraquat complexes was unlikely to happen in a solution or at the soil *** K-edge X-ray absorption spectroscopy indicated that Cu in soil may have some water as hydration layers as the nearest neighbors,and each Cu atom was coordinated with five oxygen *** findings greatly improve our knowledge of the molecular-scale adsorption mechanisms of paraquat and Cu in soil and can be used to predict the behavior,transport,and fate of paraquat and Cu in agricultural soils.

关键词： cation exchange capacity competitive adsorption heavy metal herbicide organic contaminant soilorganic matter ultraviolet-visible absorption spectrophotometry X-ray absorption spectroscopy