Mobilization of arsenic on nano-TiO2 in soil columns with sulfate reducing bacteria
文献类型：期刊论文
| 作者 | Chan, Tingshan; Luo, Ting; Ye, Li; Jing, Chuanyong |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2018-03-01 |
| 卷号 | 234页码:762-768 |
| 关键词 | Arsenic mobilization Nano-TiO2 Sulfate reducing bacteria Soil column |
| ISSN号 | 0269-7491 |
| 文献子类 | Article |
| 英文摘要 | Arsenic (As) remediation in contaminated water using nanoparticles is promising. However, the fate and transport of As associated with nano-adsorbents in natural environment is poorly understood. To investigate the fate of adsorbed As on nano-TiO2 in changed redox condition from oxic to anoxic, we added the As(V)-TiO2 suspension in groundwater to an autoclaved soil column which inoculated a sulfate-reducing bacterium, Desulfovibrio vulgaris DP4. The dissolved As(V) in effluent increased to 798 mu g/L for the biotic column and to 1510 mu g/I. for the abiotic control, and dissolved As(III) was observed only in biotic column. The total As (dissolved plus particulate) in the biotic column effluent (high to 2.5 mg/L) was substantially higher than the abiotic control (1.5 mg/L). Therefore SRB restrained the release of dissolved As, and facilitated the transport of particulate As. Micro-XRF analysis suggested that the nano-TiO2 with As was mainly retained in the influent front and that its transport was negligible. Our pe-pH calculation and XANES analysis demonstrated that generated secondary iron minerals containing magnetite and mackinawite mainly were responsible for dissolved As retention, and then transported with As as particulate As. The results shed light on the mobilization of adsorbed As on a nano-adsorbent in an anoxic environment. (C) 2017 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40985]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Chan, Tingshan,Luo, Ting,Ye, Li,et al. Mobilization of arsenic on nano-TiO2 in soil columns with sulfate reducing bacteria[J]. ENVIRONMENTAL POLLUTION,2018,234:762-768. |
| APA | Chan, Tingshan,Luo, Ting,Ye, Li,&Jing, Chuanyong.(2018).Mobilization of arsenic on nano-TiO2 in soil columns with sulfate reducing bacteria.ENVIRONMENTAL POLLUTION,234,762-768. |
| MLA | Chan, Tingshan,et al."Mobilization of arsenic on nano-TiO2 in soil columns with sulfate reducing bacteria".ENVIRONMENTAL POLLUTION 234(2018):762-768. |
入库方式： OAI收割
来源：生态环境研究中心
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