title: Spatial and seasonal changes of arsenic species in Lake Taihu in relation to eutrophication.
abstract: Spatial and seasonal variations of arsenic species in Lake Taihu (including Zhushan Bay, Meiliang Bay, Gonghu Bay, and Southern Taihu) were investigated. Relatively high levels of total arsenic (TAs) and arsenate (As(V)) were observed in hyper-eutrophic regions during summer and autumn, which is attributed to exogenous contamination and seasonal endogenous release from sediments. The distributions of TAs and As(V) were significantly affected by total phosphorus, iron, manganese, and dissolved organic carbon. Arsenite (As(III)) and methylarsenicals (the sum of monomethylarsenic acid (MMA(V)) and dimethylarsenic acid (DMA(V))), mainly from biotransformation of As(V), were affected by temperature-controlled microalgae activities and local water quality parameters, exhibiting significantly higher concentrations and proportions in hyper-eutrophic and middle eutrophic regions during summer compared to mesotrophic region. The eutrophic environment, which induces changes in the main water quality parameters such as phosphorus, chlorophyll-a, iron, manganese, and dissolved organic carbon, can favor the biogeochemical cycling of arsenic in the aquatic systems.
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Electronic address: czyan@iue.ac.cn.
authors.forename: Changzhou
authors.initials: C
authors.lastname: Yan
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Feifei
authors.initials: F
authors.lastname: Che
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Liqing
authors.initials: L
authors.lastname: Zeng
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
authors.forename: Zaosheng
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
authors.forename: Miaomiao
authors.initials: M
authors.lastname: Du
authors.affiliation: College of Environmental Science & Engineering, Donghua University, Songjiang District, Shanghai 201620, China.
authors.forename: Qunshan
authors.initials: Q
authors.lastname: Wei
authors.affiliation: College of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, China.
authors.forename: Zhenhong
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Dapeng
authors.initials: D
authors.lastname: Wang
authors.affiliation: Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Zhen
mesh_terms: D001151:Arsenic / Q000032:analysis*; D002681:China; D005068:Eutrophication; D060106:Lakes / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D060753:Water Quality
chemical_list: D014874:Water Pollutants, Chemical; D001151:Arsenic
keywords: Algal blooms; Redundancy analysis; Speciation; Transformation; Water quality parameters