title: Arsenic Speciation in Organisms from two Large Shallow Freshwater Lakes in China.
abstract: This study measured the elemental and species concentrations of arsenic (As) in the water, sediments and food webs of two shallow Chinese freshwater lakes. Organic As species were widely detected in various organisms from the two lakes (60%-100% of the total). Among these organisms, dimethylarsinic acid (DMA) was predominant in most of the samples. The average concentrations and corresponding proportions were 0.59 mg/kg, 81% in fish; 3.24 mg/kg, 70.63% in zoobenthos; and 1.34 mg/kg, 79% in plants. The average concentrations and corresponding proportions of monomethylarsonic acid (MMA) and inorganic As were much lower, ranging from n.d. (not detected) to 1.94 mg/kg and from n.d. to 1.54 mg/kg, with an average proportion of 14 and 7.4%, respectively. In Lake Taihu, the mean As concentrations in different fish tissues were generally low and in the following order: eggs (0.47) < skin (0.62) < muscles (0.91) < gills (1.65) < livers (5.47) mg/kg. DMA occupied 75%-100% of the total As species, while MMA and inorganic As were much less prevalent.
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.|Key Laboratory of Land Surface Pattern and Simulation, Chinese Academy of Sciences, Beijing, 100101, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Fen
authors.initials: F
authors.lastname: Yang
authors.affiliation: Heilongjiang Geomatics Center, National Administration of Surveying, Mapping and Geoinformation, Harbin, 150081, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Zhang
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China. weicy@igsnrr.ac.cn.|Key Laboratory of Land Surface Pattern and Simulation, Chinese Academy of Sciences, Beijing, 100101, China. weicy@igsnrr.ac.cn.
authors.forename: Chaoyang
authors.initials: C
authors.lastname: Wei
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.|Key Laboratory of Land Surface Pattern and Simulation, Chinese Academy of Sciences, Beijing, 100101, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Jinxin
authors.initials: J
authors.lastname: Liu
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.|Key Laboratory of Land Surface Pattern and Simulation, Chinese Academy of Sciences, Beijing, 100101, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Shaowen
authors.initials: S
authors.lastname: Xie
mesh_terms: D000818:Animals; D001151:Arsenic / Q000032:analysis* / Q000737:chemistry*; D001152:Arsenicals / Q000032:analysis; D002101:Cacodylic Acid / Q000032:analysis; D002681:China; D005399:Fishes / Q000378:metabolism*; D020387:Food Chain; D060106:Lakes / Q000737:chemistry
chemical_list: D001152:Arsenicals; D002101:Cacodylic Acid; C020300:monomethylarsonic acid; D001151:Arsenic
keywords: Arsenic; Fishes; Macrophytes; Zoobenthos