Bioturbation/bioirrigation effect on thallium released from reservoir sediment by different organism types
文献类型：期刊论文
| 作者 | He, Yi ; Men, Bin; Yang, Xiaofang; Wang, Dongsheng
|
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2015-11-01 |
| 卷号 | 532期号:0页码:617-624 |
| 关键词 | Thallium Bioturbation Reservoir Tubificid Chironomid larvae Loach |
| 英文摘要 | Bioturbation can remobilize heavymetal in the sediments and may pose a risk for aquatic biota. The effects of bioturbation/bioirrigation by three different riverine organism types (Tubificid, Chironomid larvae, and Loach) on thallium release from contaminated sediment (10.0 +/- 1.1 mg Tl/kg sediment, dry wt.) were evaluated in this study. The bioturbation by the epibenthos clearly caused an increased turbidity in the overlying water, and the effect was in the order of Loach > Chironomid larvae > Tubificid. A significant release of Tl into the water column via the resuspended sediment particles was observed, especially for Loach. During the first few days, the leaching of dissolved Tl from sediment into water was fast, and the dissolved Tl under bioturbation/bioirrigation was much higher than the control group. However, after 14 days, the bioturbation/bioirrigation process seemed to suppress the release of Tl from the sediment particles to water, especially for sediment with Loach. This may partly be due to the sorption or coprecipitation of Tl simultaneous with the formation of iron and manganese hydrous oxides with increased pH values as a consequence of phytoplankton growth. Linear regression analysis confirmed that both the total and particulate Tl concentrations had good correlations with particulate Fe and Mn concentrations as well as turbidity in the overlying water. Additionally, planktonic bacteria may oxidize the Tl(I) to Tl(III), resulting in a reduced solubility of Tl by which Tl(OH)(3) becomes the predominant form of Tl. (c) 2015 Elsevier B.V. All rights reserved. |
| 研究领域[WOS] | Environmental Sciences |
| WOS记录号 | WOS:000360286500062 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32730]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | He, Yi,Men, Bin,Yang, Xiaofang,et al. Bioturbation/bioirrigation effect on thallium released from reservoir sediment by different organism types[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2015,532(0):617-624. |
| APA | He, Yi,Men, Bin,Yang, Xiaofang,&Wang, Dongsheng.(2015).Bioturbation/bioirrigation effect on thallium released from reservoir sediment by different organism types.SCIENCE OF THE TOTAL ENVIRONMENT,532(0),617-624. |
| MLA | He, Yi,et al."Bioturbation/bioirrigation effect on thallium released from reservoir sediment by different organism types".SCIENCE OF THE TOTAL ENVIRONMENT 532.0(2015):617-624. |
入库方式： OAI收割
来源：生态环境研究中心
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