Influences of size-fractionated humic acids on arsenite and arsenate complexation and toxicity to Daphnia magna
文献类型：期刊论文
| 作者 | Ren, Jinqian3; Fan, Wenhong3; Wang, Xiangrui3; Ma, Qingquan3; Li, Xiaomin3; Xu, Zhizhen2; Wei, Chaoyang1 |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2017 |
| 卷号 | 108页码:68-77 |
| 关键词 | Inorganic arsenic DOM property Molecular weight Complexation Toxicity |
| ISSN号 | 0043-1354 |
| DOI | 10.1016/j.watres.2016.10.052 |
| 英文摘要 | The 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. |
| WOS关键词 | DISSOLVED ORGANIC-MATTER ; OXIDATIVE STRESS ; MOLECULAR-WEIGHT ; FULVIC-ACIDS ; COPPER ; CADMIUM ; BIOAVAILABILITY ; SUBSTANCES ; BINDING ; MODEL |
| 资助项目 | National 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] |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000390181600007 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/65350]  |
| 专题 | 陆地表层格局与模拟院重点实验室_外文论文 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Beijing Municipal Inst Labor Protect, Key Lab Occupat Safety & Hlth, Beijing 10054, Peoples R China 3.Beihang Univ, Sch Space & Environm, 37 Xueyuan Rd, Beijing 100191, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地理科学与资源研究所
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