Weak magnetic field significantly enhances selenite removal kinetics by zero valent iron
文献类型：期刊论文
| 作者 | Liang, LP ; Sun, W ; Guan, XH ; Huang, YY ; Choi, WY ; Bao, HL ; Li, LN ; Jiang, Z |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2014 |
| 卷号 | 49页码:371—380 |
| 关键词 | NITRATE REDUCTION ZEROVALENT IRON PH REMEDIATION MECHANISMS PARTICLES CR(VI) METAL |
| ISSN号 | 0043-1354 |
| 通讯作者 | guanxh@tongji.edu.cn |
| 英文摘要 | The effect of weak magnetic field (WMF) on Se(IV) removal by zero valent iron (ZVI) was investigated as functions of pH and initial Se(IV) concentrations. The presence of WMF significantly accelerated Se(IV) removal and extended the working pH range of ZVI from 4.0 -6.0 to 4.0-7.2. The WMF induced greater enhancement in Se(IV) removal by ZVI at lower initial Se(IV) concentrations. The influence of WMF on Se(IV) removal by ZVI was associated with a more dramatic drop in ORP and a more rapid release of Fe2+ compared to the case without WMF. SEM and XRD analysis revealed that WMF accelerated the corrosion of ZVI and the transformation of amorphous iron (hdyr)oxides to lepidocrocite. XANES analyses showed that WMF expedited the reduction of Se(IV) to Se(0) by ZVI at pH 6.0 when its initial concentration was <20.0 mg L-1. Se(IV) dosed at 40.0 mg L-1 was removed by ZVI via adsorption followed by reduction to Se(0) at pH 7.0 but via adsorption at 7.2 in the presence of WMF. Regardless of WMF, Se(IV) applied at 40.0 mg L was removed by reduction at pH 4.0-6.0. The WMF-induced improvement in Se(IV) removal by ZVI may be mainly attributable to the Lorentz force and magnetic field gradient force. Employing WMF to enhance Se(IV) removal by ZVI is a promising and environmental-friendly method since it does not need extra energy and costly reagents. (C) 2013 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000330601400033 |
| 公开日期 | 2015-03-13 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/14556]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Liang, LP,Sun, W,Guan, XH,et al. Weak magnetic field significantly enhances selenite removal kinetics by zero valent iron[J]. WATER RESEARCH,2014,49:371—380. |
| APA | Liang, LP.,Sun, W.,Guan, XH.,Huang, YY.,Choi, WY.,...&Jiang, Z.(2014).Weak magnetic field significantly enhances selenite removal kinetics by zero valent iron.WATER RESEARCH,49,371—380. |
| MLA | Liang, LP,et al."Weak magnetic field significantly enhances selenite removal kinetics by zero valent iron".WATER RESEARCH 49(2014):371—380. |
入库方式： OAI收割
来源：上海应用物理研究所
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