Species distribution of arsenic in sediments after an unexpected emergent discharge of high-arsenic wastewater into a river
文献类型：期刊论文
| 作者 | Liu, Ruiping1; Xu, Wei1,2; Wu, Kun1,2; Gong, Wenxin1,2; Liu, Huijuan1; Qu, Jiuhui1 |
| 刊名 | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
 |
| 出版日期 | 2013-08-01 |
| 卷号 | 7期号:4页码:568-578 |
| 关键词 | river sediments arsenic species distribution binding phases unexpected discharge of high-As wastewater |
| 英文摘要 | The unexpected emergent discharge of high-arsenic wastewater into water environments results in significantly increased levels of arsenic in water; however, the species distribution of arsenic in sediments has never been reported before for such cases. This study focuses on an As pollution accident in the Dasha River, and uses sequential extraction procedures with deionized water, 1 mol center dot L-1 MgCl2 at pH = 8, 1 mol center dot L-1 NaH2PO4 at pH = 5, and 1 mol center dot L-1 HCl to investigate four binding phases of arsenic (i.e., water soluble, ion-exchangeable, stronglybound, and precipitates) in sediments at different layers in different cross-sections along the river. The average ratio of arsenite (As(III)) to arsenate (As(V)) was found to decrease from 0.74:1 in river water to 0.48:1 in sediment, owing to its higher affinity toward As(V) than As(III). The content of arsenic in the sediments was relatively low and the maximum content was observed to be 36.3 mg center dot kg(-1) for As(III) and 97.5 mg center dot kg(-1) for As(V). As(III) and As(V) showed different binding phases in sediments, and the average fractions of these four species were determined to be 0.09, 0.11, 0.17, and 0.63 for As(III) and 0.03, 0.14, 0.63, and 0.20 for As(V), respectively. For all the sediment samples, the content of arsenic showed no relationship with the characteristics of the sediments such as the particle diameter, the content of organic carbon, Fe, and Mn, although a negative correlation with particle diameter was observed for the sediments in the uppermost 2-cm layer. The unexpected emergent As incident results in the high content of total arsenic in the surface sediment, which may be potential secondary source to the elevated As levels in surface water. |
| WOS标题词 | Science & Technology ; Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Engineering, Environmental ; Environmental Sciences |
| 研究领域[WOS] | Engineering ; Environmental Sciences & Ecology |
| 关键词[WOS] | MOBILITY ; GROUNDWATER ; BANGLADESH ; EXTRACTION ; SOILS ; IRON ; OXIDE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000321138300012 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/24649]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Ruiping,Xu, Wei,Wu, Kun,et al. Species distribution of arsenic in sediments after an unexpected emergent discharge of high-arsenic wastewater into a river[J]. FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,2013,7(4):568-578. |
| APA | Liu, Ruiping,Xu, Wei,Wu, Kun,Gong, Wenxin,Liu, Huijuan,&Qu, Jiuhui.(2013).Species distribution of arsenic in sediments after an unexpected emergent discharge of high-arsenic wastewater into a river.FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,7(4),568-578. |
| MLA | Liu, Ruiping,et al."Species distribution of arsenic in sediments after an unexpected emergent discharge of high-arsenic wastewater into a river".FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 7.4(2013):568-578. |
入库方式： OAI收割
来源：生态环境研究中心
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