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Kinetics and capacities of non-reactive phosphorus (NRP) sorption to crushed autoclaved aerated concrete (CAAC)

Journal of environmental Sciences 2023年第5期127卷 799-810页

作者： Shuting Shen Xiang Li Zhuofan Geng Xiwu Lu School Energy and environment Southeast UniversityNanjing 210096China erc taihu lake water environment wuxi Wuxi 214135China

With growing interest in resource recovery and/or reuse,wastematerials have been considered a promising alternative for phosphorus(P)adsorption because they are low-cost and easily *** autoclaved aerated concrete(CAAC),as representative construction waste,has been extensively studied for P removal in ecological technologies such as treatment ***,most of the previous studies focused on the adsorption of orthophosphate,namely reactive phosphorus,and lacked attention to non-reactive phosphorus(NRP)which is widely present in *** study presents the first investigation on the potential and mechanism of CAAC removing four model NRP *** isotherm and kinetics of NRP onto CAAC indicate that the removal of NRP was a chemisorption process and also involved a two-step pore diffusion *** desorption experiment shows that different NRP species showed varying degrees of *** NRP was irreversibly adsorbed on *** the model compounds considered in this study,the adsorption capacity and hydrolysis rate of organophosphorus were much less than that of inorganic ***,the adsorption of different NRP species by CAAC in the mesocosm study was different from the results of laboratory adsorption experiments,and the possible biodegradation was essential for the conversion and removal of *** findings confirmed the validity of CAAC for NRP removal and the potential advantages of CAAC in terms of costs and environmental *** study will contribute to a better understanding of NRP conversion and environmental fate and that can be the basis for a refined risk assessment.

关键词： Non-reactive phosphorus Crushed autoclaved aerated concrete Phosphorus removal Sorption Wastewater treatment

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Role of biologic components in a novel floating-bed combining Ipomoea aquatic, Corbicula fluminea and biofilm carrier media

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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

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Effects of temperature and nutrients on phytoplankton biomass during bloom seasons in taihu lake

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water Science and Engineering 2012年第4期5卷 361-374页

作者： Lin-lin CAI Guang-wei ZHU Meng-yuan ZHU Hai XU Bo-qiang QIN State Key Laboratory of lake Science and environment Nanjing Institute of Geography and LimnologyChinese Academy of Sciences wuxi taihu lake Management Company Limited

Long-term variations of phytoplankton chlorophyll-a （Chl-a）, nutrients, and suspended solids （SS） in taihu lake, a large shallow freshwater lake in China, during algal bloom seasons from May to August were analyzed using the monthly investigated data from 1999 to 2007. The effective accumulated water temperature （EAWT） in months from March to June was calculated with daily monitoring data from the taihu Laboratory for lake Ecosystem Research （TLLER）. The concentrations of Chl-a and nutrients significantly decreased from Meiliang Bay to Central lake. Annual averages of the total nitrogen （TN）, total phosphorus （TP）, and Chl-a concentrations, and EAWT generally increased in the nine years. In Meiliang Bay, the concentration of Chl-a was significantly correlated with EAWT, ammonia nitrogen （NH4＋N）, TN, the soluble reactive phosphorus （SRP）, TP, and SS. In Central lake, however, the concentration of Chl-a was only correlated with EAWT, TP, and SS. Multiple stepwise linear regression revealed that EAWT, dissolved total phosphorus （DTP）, and TP explained 99.2% of the variation of Chl-a in Meiliang Bay, and that EAWT, NH4＋-N, and TP explained 98.7% of the variation of Chl-a in Central lake. Thus EAWT is an important factor influencing the annual change of phytoplankton biomass. Extreme climate change, such as extremely hot springs or cold springs, could cause very different bloom intensities in different years. It is also suggested that both nutrients and EAWT played important roles in the growth of phytoplankton in taihu lake. The climate factors and nutrients dually controlled the risk of harmful algal blooms in taihu lake. Cutting down phosphorus and nitrogen loadings from catchments should be a fundamental strategy to reduce the risk of blooms in taihu lake.

关键词： taihu lake Microcystis bloom water temperature nutrients climate change

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Evaluation of regional water resources carrying capacity based on binary index method and reduction index method

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water Science and Engineering 2019年第4期12卷 263-273页

作者： Hong-yuan Fang Sheng-wei Gan Chen-ying Xue College of Hydraulic Science and Engineering Yangzhou UniversityYangzhou 225009China taihu lake Basin Hydrological and water Resources Monitoring Center Wuxi 214024China

Based on the regional water resources carrying capacity(WRCC)evaluation principles and evaluation index system in the National Technical Outline of water Resources Carrying Capacity Monitoring and Early Warning(hereafter referred to as the Technical Outline),this paper elaborates on the collection and sorting of the basic data of water resources conditions,water resources development and utilization status,social and economic development in basins,analysis and examination of integrity,consistency,normativeness,and rationality of the basic data,and the necessity of WRCC *** paper also describes the technique of evaluating the WRCC in prefecture-level cities and city-level administrative divisions in the District of the taihu lake Basin,which is composed of the taihu lake Basin and the Southeastern River *** evaluation process combines the binary index evaluation method and reduction index evaluation *** former,recommended by the Technical Outline,uses the total water use and the amount of exploited groundwater as evaluation indices,showing stronger operability,while the latter is developed by simplifying and optimizing the comprehensive index system with greater systematicness and *** mutual validation and adjustment of the results of the above-mentioned two evaluation methods indicate that the WRCC of the District of the taihu lake Basin is overloaded in general because some prefecture-level cities and city-level administrative divisions in the taihu lake Basin and the Southeastern River Basin are in a severely overloaded *** order to explain this conclusion,this paper analyzes the causes of WRCC overloading from the aspects of basin water environment,water resources development and utilization,water resources regulation and control ability,water resources utilization efficiency,and water resources management.

关键词： water resources carrying capacity(WRCC) Evaluation Binary index method Reduction index method Prefecture-level cities and city-level administrative divisions

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Nitrated and parent PAHs in the surface water of lake taihu,China:Occurrence,distribution,source,and human health risk assessment

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Journal of environmental Sciences 2021年第4期33卷 159-169页

作者： Jijie Kong Yuxuan Dai Mengshu Han Huan He Jiapeng Hu Junyi Zhang Junzhe Shi Qiming Xian Shaogui Yang Cheng Sun The State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of environment Nanjing Normal UniversityNanjing 210023China College of Ecological and Resource Engineering Fujian Provincial Key laboratory of Eco-Industrial Green TechnologyWuyi UniversityWuyishan 354300China wuxi environmental Monitoring Centre Wuxi 214121China

Nitrated polycyclic aromatic hydrocarbons(NPAHs)have toxic potentials that are higher than those of their corresponding parent polycyclic aromatic hydrocarbons(PAHs)and thus have received increasing attention in recent *** this study,the occurrence,distribution,source,and human health risk assessment of 15 NPAHs and 16 PAHs were investigated in the surface water from 20 sampling sites of lake taihu during the dry,normal,and flood seasons of *** PAH concentrations ranged from 255 to 7298 ng/L and the NPAH concentrations ranged from not-detected(ND)to 212 ng/*** the target analytes,2-nitrofluorene(2-n Flu)was the predominant NPAH,with a detection frequency ranging from 85%to 90%and a maximum concentration of 56.2 ng/*** three-ringed and four-ringed NPAHs and PAHs comprised the majority of the detected *** terms of seasonal variation,the highest levels of the NPAHs and PAHs were in the dry season and flood season,*** ratio analysis indicated that the prime source of NPAHs was direct combustion,whereas in the case of PAHs the contribution was predominantly from a mixed pattern including pollution from unburned petroleum and petroleum *** human health risk of NPAHs and PAHs was evaluated using a lifetime carcinogenic risk assessment *** carcinogenic risk level of the targets ranged from 2.09×10^(-7)to 5.75×10^(-5)and some surface water samples posed a potential health risk.

关键词： Nitrated polycyclic aromatic hydrocarbons Surface water Occurrence Seasonal variation Human health risk assessment

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General Thinkingon the Management of Blue Algae Outbreak in the taihu lake,the Chaohu lake and the Dianchi lake

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Meteorological and environmental Research 2015年第1期6卷 48-54,58页

作者： Zhu Xi Zhu Jinhua Hu Mingming wuxi Bureau of water Conservation wuxi water Resources Management Office wuxi Delin Algae water Separation Technology Development Co. Ltd.

Among the Chinese lakes with the problem of eutrophication, the taihu lake, the Chaohu lake and the Dianchi lake have the worst cases of blue algae outbreak, which happen every year. Other lakes also have problems of blue algae outbreak at various degrees. However, some lakes don＇t have such problems. Practices have shown that through comprehensive management, the problem can be basically eliminated or significantly alleviated. ＂water bloom＂ and blue algae outbreak have different connotation. The major factors affecting blue algae outbreak are sources of pollutants and ecological environment. Experiences are summed up and a new thinking on its management is developed： resolving the problem of blue algae is fundamental to lake management and development goals should be clearly set forth so as to eventually build a healthy aquatic ecosys- tem. The problem of blue algae can＇t be fully tackled by solely relying on the management of eutrophication but only by combining efforts of reducing the amount of blue algae and the management of eutrophication. The number of reduced blue algae should be larger than that of naturally prolifera- ted algae so as to alleviate and eliminate the problem of blue algae outbreak. Various engineering and technical measures and relevant protective procedures should be carried out in a scientific and proper manner. The total amount of nitrogen and phosphorous entering the lake either from point-source or non-point source pollution should be substantially reduced. Controlling the source of pollution and intercepting pollutants are the bas- ic measures. Wastewater treatment plant is the largest point source pollution in the future and adequate plants should be built with improved emission standards. Meanwhile, other measures including fishing out blue algae, diverting water, dredging, ecological restoration and expanding reed zone, should be implemented to alleviate the problem of eutrophication and eventually eliminate the problem of blue algae

关键词： The taihu lake The Chaohu lake The Dianchi lake Blue algae outbreak Management thinking China

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Industrial and Agricultural Effects on water environment and Its Optimization in Heavily Polluted Area in taihu lake Basin, China

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Chinese Geographical Science 2013年第2期23卷 203-215页

作者： ZHAO Haixia YOU Bensheng DUAN Xuejun Stewart BECKY JIANG Xiaowei State Key Laboratory of lake Science and environment Nanjing Institute of Geography and LimnologyChinese Academy of Sciences White Clay Editorial Newark College of Territorial Resources and Tourism Anhui Normal University

The deteriorating water quality in the taihu lake Basin has attracted widespread attention for many years, and is correlated with a sharp increase in the quantity of pollutant discharge such as agricultural fertilizers and industrial wastewater. In this study, several factors were selected for evaluating and regionalizing the water environmental capacity by ArcG1S spatial analysis, including geomor- phologic characteristics, water quality goals, water body accessibility, water-dilution channels, and current water quality. Then, the spa- tial optimization of agriculture and industry was adjusted through overlay analysis, based on the balance between industrial space and water environmental capacity. The results show that the water environmental capacity gradually decreases from the west to the east, in contrast, the pollution caused by industrial and agricultural clustering is distributes along taihu lake, Gehu lake and urban districts. The analysis of the agricultural space focuses on optimizing key protected areas of the taihu lake Basin, and the shores of Gehu lake, optimally adjusting the second protected areas of the taihu lake Basin, and generally adjusting the urban areas of Changzhou and wuxi cities. The analysis of industrial space focuses on optimizing the downtowns of Changzhou and wuxi cities, optimally adjusting key protected areas and second protected areas of the taihu lake Basin, and generally adjusting the south and southwest of Gehu lake. Lastly, some schemes of industrial and agricultural layouts and policies for the direction of industrial and agricultural development were proposed, reflecting a correlation between industry and agriculture and the water environment.

关键词： water environmental capacity industrial and agricultural pollution spatial optimization heavily polluted area

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Characterization of Changes and Driver Microbes in Gut Microbiota During Healthy Aging Using A Captive Monkey Model

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Genomics, Proteomics & Bioinformatics 2022年第2期20卷 350-365页

作者： Zhi-Yuan Wei Jun-Hua Rao Ming-Tian Tang Guo-An Zhao Qi-Chun Li Li-Ming Wu Shao-Qiang Liu Bi-Hai Li Bai-Quan Xiao Xing-Yin Liu Jian-Huan Chen Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhou 510260China Laboratory of Genomic and Precision Medicine Wuxi School of MedicineJiangnan UniversityWuxi 214122China Joint Primate Research Center for Chronic Diseases Jiangnan University and Institute of ZoologyGuangdong Academy of SciencesWuxi School of MedicineJiangnan UniversityWuxi 214122China Department of Pathogen-Microbiology Division Nanjing Medical UniversityNanjing 211166China

Recent population studies have significantly advanced our understanding of how age shapes the gut ***,the actual role of age could be inevitably confounded due to the complex and variable environmental factors in human populations.A well-controlled environment is thus necessary to reduce undesirable confounding effects,and recapitulate age-dependent changes in the gut microbiota of healthy *** we performed 16S rRNA gene sequencing,characterized the age-associated gut microbial profiles from infant to elderly crab-eating macaques reared in captivity,and systemically revealed the lifelong dynamic changes of the primate gut *** the most significant age-associated taxa were mainly found as commensals such as Faecalibacterium,the abundance of a group of suspicious pathogens such as Helicobacter was exclusively increased in infants,underlining their potential role in host ***,topology analysis indicated that the network connectivity of gut microbiota was even more agedependent than taxonomic diversity,and its tremendous decline with age could probably be linked to healthy ***,we identified key driver microbes responsible for such age-dependent network changes,which were further linked to altered metabolic functions of lipids,carbohydrates,and amino acids,as well as phenotypes in the microbial *** current study thus demonstrates the lifelong age-dependent changes and their driver microbes in the primate gut microbiota,and provides new insights into their roles in the development and healthy aging of their hosts.

关键词： Age-dependent change Non-human primate Healthy gut microbiota Network connectivity Driver microbe

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An analysis on the evolvement processes of lake eutrophication and their characteristics of the typical lakes in the middle and lower reaches of Yangtze River

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Chinese Science Bulletin 2006年第13期51卷 1603-1613页

作者： CHENG Xiaoying1,2,3 & LI Shijie1 1. Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, China 2. The Key Laboratory of Industrial Biotechnology, Ministry of Educa- tion, Southern Yangtze University, wuxi 214036, China 3. School of Biotechnology, Southern Yangtze University, wuxi 214036, China Nanjing Institute of Geography & Limnology Chinese Academy of Sciences Nanjing China The Key Laboratory of Industrial Biotechnology Ministry of Education Southern Yangtze University Wuxi China School of Biotechnology Southern Yangtze University Wuxi China

According to the study on the aquatic environment of the typical lakes in the middle and lower reaches of Yangtze River, lake eutrophication is a process in which the lake ecosystem degenerates, resulting in the deterioration of the water quality due to the enrichment of the nutrients. Moreover, the succession of lake ecosystem and change of water quality both couple well with the evolvement of tro- phic state. Then the conceptual model is mentioned and ten lake states are classified. Based on these, the authors analyzed the eutrophication processes of the typical lakes in the middle and lower reaches of Yangtze River. The large lakes with taking in - send- ing out water typical of Poyang lake evolve from State 1 before the 1980s into State 2 after the 1980s, the large and medium lakes typical of taihu lake evolve from State 1-2 in the 1960s into State 8 in the 1980s then into State 9 in the 1990s, the medium and small shallow lakes typical of Honghu lake evolve from State 1 in the 1960s into State 2 after the 1980s and the small city (suburban) lakes typical of Donghu lake evolve from State 2 in the 1960s into State 9 after the 1970s. Further, the 1980s is the key con- version period of the lakes of various types typical of Poyang lake, Honghu lake and taihu lake con- verting into mesotrophic state, the 1990s is that of taihu lake into eutrophic state and the 1970s is thatof the small city (suburban) lakes typical of Donghu lake into eutrophic state. The series of nutrient evolvement of different typical lakes are similar, but the processes are not synchronous, which is related to the various human and natural driving mechanisms in lake basins.

关键词：长江湖泊富营养化概念模型转变时期驱动机制

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Responses of morphological and physiological traits to herbivory by snails of three invasive and native submerged plants

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Journal of Plant Ecology 2022年第3期15卷 571-580页

作者： Xiaolong Huang Jinlei Yu Baohua Guan Hongmin Xie Shuailing Liu Hu He Kuanyi Li State Key Laboratory of lake Science and environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Jiangsu Jiangda Eco Technology Co. Ltd.Wuxi 214135China Sino-Danish College University of Chinese Academy of SciencesBeijing 100049China College of environmental and Chemical Engineering Chongqing Three Gorges UniversityWanzhou 404000China

The submerged plant species Carolina fanwort(Cabomba caroliniana)has become a dominant invasive aquatic plant in the lake taihu Basin(LTB)in *** species may escape their original specialist enemies and encounter fewer enemies in their new *** were assumed to have suffered less herbivory than native species as they are relatively unpalatable(the enemy release hypothesis[ERH]).The objective of this study was to compare the responses of *** with those of co-occurring native species to herbivory from native *** conducted a mesocosm experiment to record the responses of *** and two commonly co-occurring native submerged plant counterparts,water thyme(Hydrilla verticillata)and Eurasian watermilfoil(Myriophyllum spicatum),to herbivory by two native generalist gastropod snails,Radix swinhoei and Sinotaia *** morphological traits(total biomass,shoot/root[S/R]biomass ratio and relative growth rate[RGR])and physiological traits(leaf total nonstructural carbohydrate[TNC],lignin,and cellulose)were *** snail *** rarely influenced the plant traits of the three submerged *** the increasing numbers of *** treatments,most of the plant traits of *** and *** changed,while those of *** showed a relatively stable *** result indicates that *** is more resistant to herbivory by the snail ***,which is consistent with the ERH *** finding indicates that herbivorous snail species contributes to the invasion of ***,which potentially alters the species composition of submerged plants in the plant community.

关键词： aquatic plant biological invasion Cabomba caroliniana enemy release hypothesis lake taihu Basin plant–herbivore interactions

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