| Dynamics of arsenic and its interaction with Fe and S at the sediment-water interface of the seasonal hypoxic Changjiang Estuary | |
Duan, Liqin1,2,3,4; Song, Jinming1,2,3,4 ; Yin, Meiling1,3; Yuan, Huamao1,2,3,4; Li, Xuegang1,2,3,4; Zhang, Yuting1,3; Yin, Xuebo2,3,4,5
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| 2021-05-15 | |
| 发表期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
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| ISSN | 0048-9697 |
| 卷号 | 769页码:10 |
| 通讯作者 | Duan, Liqin([email protected]) |
| 摘要 | The dynamics of As at the sediment-water interface (SWI) is an important link in driving As release into the upper water column to affect biological activities. At present, it is unclear about the As cycling at the SWI, especially under the influence of seasonal hypoxia in the Changjiang Estuary. In this study, the profile variations of As in porewater and solid phases from the Changjiang Estuary were studied. Results suggested that As profiles presented the "removal-release-removal" pattern with depth. Arsenic profiles were typically characterized by subsurface maxima in porewater and surficial enrichment in solid phase, which were dosely related to Fe and S cycling. The occurrence of porewater As peaks and its obvious speciation transition at subsurface layers, companied by the conversion of dominant phases of solid As from reductive to oxidative fractions at the same layers indicated the reductive release of As at redoxcline. Arsenic species, saturation indexes (SI) and net reaction rates (R-net(As)) suggested that the removal of As at surface and deep layers were attributed to the adsorption of As (V) by Fe oxides and the formation of orpiment and/or adsorption by Fe sulfides, respectively. The benthic hypoxic environment in late-summer was more favorable for upward migration and diffusion of As. This process was considered as an important contribution to the elevated aquatic As in the Changjiang Estuary. (C) 2021 Elsevier B.V. All rights reserved. |
| 关键词 | Arsenic Dynamic Net reaction rate The sediment-water interface The Changjiang Estuary |
| DOI | 10.1016/j.scitotenv.2021.145269 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41976037]; National Natural Science Foundation of China[41676068]; Shandong Provincial Natural Science Foundation[ZR2020YQ28]; Foundation for Huiquan Young Scholar of Institute of Oceanology, Chinese Academy of Sciences |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| WOS记录号 | WOS:000626618100137 |
| 出版者 | ELSEVIER |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/170471 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Duan, Liqin |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China |
| 第一作者单位 | 海洋生态与环境科学重点实验室; 中国科学院海洋大科学研究中心 |
| 通讯作者单位 | 海洋生态与环境科学重点实验室; 中国科学院海洋大科学研究中心 |
| 推荐引用方式 GB/T 7714 | Duan, Liqin,Song, Jinming,Yin, Meiling,et al. Dynamics of arsenic and its interaction with Fe and S at the sediment-water interface of the seasonal hypoxic Changjiang Estuary[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,769:10. |
| APA | Duan, Liqin.,Song, Jinming.,Yin, Meiling.,Yuan, Huamao.,Li, Xuegang.,...&Yin, Xuebo.(2021).Dynamics of arsenic and its interaction with Fe and S at the sediment-water interface of the seasonal hypoxic Changjiang Estuary.SCIENCE OF THE TOTAL ENVIRONMENT,769,10. |
| MLA | Duan, Liqin,et al."Dynamics of arsenic and its interaction with Fe and S at the sediment-water interface of the seasonal hypoxic Changjiang Estuary".SCIENCE OF THE TOTAL ENVIRONMENT 769(2021):10. |
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