Removal of arsenate from water by using an Fe-Ce oxide adsorbent: Effects of coexistent fluoride and phosphate
文献类型：期刊论文
| 作者 | Zhang, Yu ; Dou, Xiao-Min; Yang, Min; He, Hong; Jing, Chang-Yong; Wu, Zi-Yu
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| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
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| 出版日期 | 2010-07-15 |
| 卷号 | 179期号:3页码:208-214 |
| 关键词 | Arsenic removal Phosphate Fluoride Competitive adsorption Extended X-ray absorption fine structure spectroscopy |
| 中文摘要 | The Langmuir two-site equation, X-ray photoelectron spectroscopy, and extended X-ray absorption fine structure spectroscopy have been employed to study the competitive behaviors of fluoride (F) and phosphate (P) in relation to arsenate adsorption on an Fe-Ce adsorbent as well as the mechanisms involved. The two-site isotherm revealed the presence of two kinds of adsorption sites with different binding affinities for arsenate. Both the total and low-binding-energy maximum adsorption capacities (Q and Q(1)) of arsenate decreased significantly even at a molar ratio of As/P = 1:0.1. The coexistence of F, only influenced the total Q of arsenate at high simultaneous F concentrations. The fact that Fe-Ce released 0.15-0.24 mmol sulfate for every mmol arsenate adsorbed suggested that, while sulfate groups might have played a role for adsorption, surface hydroxyl groups should be the major active sites. The XPS results indicated that arsenate and P are mainly adsorbed through the substitution of Fe surface active sites, while F is mainly adsorbed through substitution of Ce surface active sites. The As k-edge EXAFS data show that the second peak of Fe-Ce after arsenate adsorption is As-Fe shell, which further supported that arsenate adsorption occurs mainly at the Fe surface active sites. (c) 2010 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000278626700030 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21273]  |
| 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, Yu,Dou, Xiao-Min,Yang, Min,et al. Removal of arsenate from water by using an Fe-Ce oxide adsorbent: Effects of coexistent fluoride and phosphate[J]. JOURNAL OF HAZARDOUS MATERIALS,2010,179(3):208-214. |
| APA | Zhang, Yu,Dou, Xiao-Min,Yang, Min,He, Hong,Jing, Chang-Yong,&Wu, Zi-Yu.(2010).Removal of arsenate from water by using an Fe-Ce oxide adsorbent: Effects of coexistent fluoride and phosphate.JOURNAL OF HAZARDOUS MATERIALS,179(3),208-214. |
| MLA | Zhang, Yu,et al."Removal of arsenate from water by using an Fe-Ce oxide adsorbent: Effects of coexistent fluoride and phosphate".JOURNAL OF HAZARDOUS MATERIALS 179.3(2010):208-214. |
入库方式： OAI收割
来源：生态环境研究中心
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