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Influences of size-fractionated humic acids on arsenite and arsenate complexation and toxicity to Daphnia magna
Ren, Jinqian1; Fan, Wenhong1; Wang, Xiangrui1; Ma, Qingquan1; Li, Xiaomin1; Xu, Zhizhen2; Wei, Chaoyang3
2017
Source PublicationWATER RESEARCH
ISSN0043-1354
Volume108Pages:68-77
Corresponding AuthorFan, Wenhong(fanwh@buaa.edu.cn)
AbstractThe intrinsic physicochemical properties of dissolved organic matter (DOM) may affect the mobility and toxicity of arsenic in aquatic environments. In the present study, the humic acid (HA) was ultra-filtered into five fractions according to molecular weight, and their physicochemical properties were characterized. Complexation of HA fractions with arsenite and arsenate was first determined by differential pulse polarography (DPP). The influences of HA fractions on arsenic toxicity were then examined using Daphnia magna as a model organism. As(V) had a higher affinity with HA than As(III), and their complexation was dependent on the total acidity and fluorescence characteristics of DOM. We demonstrated that the acidity and fluorescence also better explained the As toxicity to daphnids than UV absorbance and hydraulic diameter. Arsenic speciation determined by DPP significantly affected the toxicity of arsenite and arsenate. The results extended the free-ion activity model application to the case of arsenic. The present study clearly indicated that DOM with different molecular weights has distinct physicochemical properties, and could influence the speciation and toxicity of As to different extent. (C) 2016 Elsevier Ltd. All rights reserved.
KeywordInorganic arsenic DOM property Molecular weight Complexation Toxicity
DOI10.1016/j.watres.2016.10.052
WOS KeywordDISSOLVED ORGANIC-MATTER ; OXIDATIVE STRESS ; MOLECULAR-WEIGHT ; FULVIC-ACIDS ; COPPER ; CADMIUM ; BIOAVAILABILITY ; SUBSTANCES ; BINDING ; MODEL
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51290283] ; National Natural Science Foundation of China[51378041] ; Beijing Natural Science Foundation[8142027] ; Specialized Research Fund for the Doctoral Program of Higher Education[20131102110035] ; Major Science and Technology Program for Water Pollution Control and Treatment of China[2012ZX07501001]
Funding OrganizationNational Natural Science Foundation of China ; Beijing Natural Science Foundation ; Specialized Research Fund for the Doctoral Program of Higher Education ; Major Science and Technology Program for Water Pollution Control and Treatment of China
WOS Research AreaEngineering ; Environmental Sciences & Ecology ; Water Resources
WOS SubjectEngineering, Environmental ; Environmental Sciences ; Water Resources
WOS IDWOS:000390181600007
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/65351
Collection中国科学院地理科学与资源研究所
Corresponding AuthorFan, Wenhong
Affiliation1.Beihang Univ, Sch Space & Environm, 37 Xueyuan Rd, Beijing 100191, Peoples R China
2.Beijing Municipal Inst Labor Protect, Key Lab Occupat Safety & Hlth, Beijing 10054, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Ren, Jinqian,Fan, Wenhong,Wang, Xiangrui,et al. Influences of size-fractionated humic acids on arsenite and arsenate complexation and toxicity to Daphnia magna[J]. WATER RESEARCH,2017,108:68-77.
APA Ren, Jinqian.,Fan, Wenhong.,Wang, Xiangrui.,Ma, Qingquan.,Li, Xiaomin.,...&Wei, Chaoyang.(2017).Influences of size-fractionated humic acids on arsenite and arsenate complexation and toxicity to Daphnia magna.WATER RESEARCH,108,68-77.
MLA Ren, Jinqian,et al."Influences of size-fractionated humic acids on arsenite and arsenate complexation and toxicity to Daphnia magna".WATER RESEARCH 108(2017):68-77.
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