Removal of Se(IV) and Se(VI) from drinking water by coagulation
文献类型：期刊论文
| 作者 | Hu, Chengzhi; Chen, Qingxin; Chen, Guixia; Liu, Huijuan; Qu, Jiuhui |
| 刊名 | SEPARATION AND PURIFICATION TECHNOLOGY
 |
| 出版日期 | 2015-03-04 |
| 卷号 | 142页码:65-70 |
| 关键词 | Selenium Coagulation Drinking water Al based coagulant Ferric chloride |
| 英文摘要 | Selenium (Se) is one of contaminants required to be regulated during drinking water treatment, however, little information has been collected to date regarding Se removal by coagulation. In this study, the performance of Se removal by coagulation has been evaluated with respect to the dependence on Se species, coagulant type, water pH and interfering ions. The results showed that a Fe-based coagulant was much more efficient than Al-based coagulants in Se removal. The removal of selenite (Se(IV)) by coagulation was much more pronounced than that of selenate (Se(VI)). With an FC dosage of more than 0.4 mM Fe/L, Se(IV) removal efficiency of more than 98% could be achieved when the initial Se(IV) concentration was 250 mu g/L. For Al-based coagulants (AlCl3 (AC) and polyaluminum chloride (PACl)) Se removal efficiency was positively correlated with the content of Al-13 species during the coagulation process. Adsorption onto hydroxide flocs was the most active coagulation mechanism for Se removal and precipitation also played specific roles at low dosage, especially for Se(IV) removal and with Fe coagulant. High coagulant dosage and weakly acidic pH could enhance the formation of hydroxide flocs having more active adsorption sites and high zeta potential, and thus favored Se removal. These findings are important to understand the efficiency and mechanisms of Se removal by coagulation. (C) 2015 Elsevier B.V. All rights reserved. |
| 研究领域[WOS] | Engineering, Chemical |
| WOS记录号 | WOS:000350076600009 |
| 公开日期 | 2016-03-15 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/32839]  |
| 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 | Hu, Chengzhi,Chen, Qingxin,Chen, Guixia,et al. Removal of Se(IV) and Se(VI) from drinking water by coagulation[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2015,142:65-70. |
| APA | Hu, Chengzhi,Chen, Qingxin,Chen, Guixia,Liu, Huijuan,&Qu, Jiuhui.(2015).Removal of Se(IV) and Se(VI) from drinking water by coagulation.SEPARATION AND PURIFICATION TECHNOLOGY,142,65-70. |
| MLA | Hu, Chengzhi,et al."Removal of Se(IV) and Se(VI) from drinking water by coagulation".SEPARATION AND PURIFICATION TECHNOLOGY 142(2015):65-70. |
入库方式： OAI收割
来源：生态环境研究中心
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