Arsenate uptake and arsenite simultaneous sorption and oxidation by Fe-Mn binary oxides: Influence of Mn/Fe ratio, pH, Ca2+, and humic acid
文献类型：期刊论文
| 作者 | Zhang, Gaosheng ; Liu, Huijuan ; Qu, Jiuhui ; Jefferson, William |
| 刊名 | JOURNAL OF COLLOID AND INTERFACE SCIENCE
 |
| 出版日期 | 2012 |
| 卷号 | 366期号:1页码:141－146 |
| 关键词 | Fe-Mn binary oxides Arsenic Sorption Oxidation |
| ISSN号 | 0021-9797 |
| 中文摘要 | Arsenate retention, arsenite sorption and oxidation on the surfaces of Fe-Mn binary oxides may play an important role in the mobilization and transformation of arsenic, due to the common occurrence of these oxides in the environment. However, no sufficient information on the sorption behaviors of arsenic on Fe-Mn binary oxides is available. This study investigated the influences of Mn/Fe molar ratio, solution pH, coexisting calcium ions, and humic acids have on arsenic sorption by Fe-Mn binary oxides. To create Fe-Mn binary oxides, simultaneous oxidation and co-precipitation methods were employed. The Fe-Mn binary oxides exhibited a porous crystalline structure similar to 2-line ferrihydrite at Mn/Fe ratios 1:3 and below, whereas exhibited similar structures to delta-MnO2 at higher ratios. The As(V) sorption maximum was observed at a Mn/Fe ratio of 1:6, but As(III) uptake maximum was at Mn/Fe ratio 1:3. However, As(III) adsorption capacity was much higher than that of As(V) at each Mn/Fe ratio. As(V) sorption was found to decrease with increasing pH, while As(III) sorption edge was different, depending on the content of MnO2 in the binary oxides. The presence of Ca2+ enhanced the As(V) uptake under alkaline pH, but did not significantly influence the As(III) sorption by 1:9 Fe-Mn binary oxide; whereas the presence of humic acid slightly reduced both As(V) and As(III) uptake. These results indicate that As(III) is more easily immobilized than As(V) in the environment, where Fe-Mn binary oxides are available as sorbents and they represent attractive adsorbents for both As(V) and As(III) removal from water and groundwater. (C) 2011 Elsevier Inc. All rights reserved. |
| WOS记录号 | WOS:000297385900021 |
| 公开日期 | 2014-11-04 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/7839]  |
| 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 | Zhang, Gaosheng,Liu, Huijuan,Qu, Jiuhui,et al. Arsenate uptake and arsenite simultaneous sorption and oxidation by Fe-Mn binary oxides: Influence of Mn/Fe ratio, pH, Ca2+, and humic acid[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2012,366(1):141－146. |
| APA | Zhang, Gaosheng,Liu, Huijuan,Qu, Jiuhui,&Jefferson, William.(2012).Arsenate uptake and arsenite simultaneous sorption and oxidation by Fe-Mn binary oxides: Influence of Mn/Fe ratio, pH, Ca2+, and humic acid.JOURNAL OF COLLOID AND INTERFACE SCIENCE,366(1),141－146. |
| MLA | Zhang, Gaosheng,et al."Arsenate uptake and arsenite simultaneous sorption and oxidation by Fe-Mn binary oxides: Influence of Mn/Fe ratio, pH, Ca2+, and humic acid".JOURNAL OF COLLOID AND INTERFACE SCIENCE 366.1(2012):141－146. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。