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, Y; Dou, XM; Yang, M; He, H; Jing, CY; Wu, ZY; Wu ZY(吴自玉)
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| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 ; JOURNAL OF HAZARDOUS MATERIALS
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| 出版日期 | 2010 ; 2010 |
| 卷号 | 179期号:1-3页码:#REF! |
| 关键词 | Arsenic removal Phosphate Fluoride Competitive adsorption Extended X-ray absorption fine structure spectroscopy Arsenic removal Phosphate Fluoride Competitive adsorption Extended X-ray absorption fine structure spectroscopy |
| DOI | 10.1016/j.jhazmat.2010.02.081 |
| 通讯作者 | Zhang, Y (reprint author), Chinese Acad Sci, State Key Lab Environm Aquat Chem, Ecoenvironm Sci Res Ctr, POB 2871, Beijing 100085, Peoples R China. ; Zhang, Y (reprint author), Chinese Acad Sci, State Key Lab Environm Aquat Chem, Ecoenvironm Sci Res Ctr, POB 2871, Beijing 100085, Peoples R China. |
| 文献子类 | Article |
| 英文摘要 | 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.; 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. |
| 学科主题 | Engineering; Environmental Sciences & Ecology ; Engineering; Environmental Sciences & Ecology |
| 类目[WOS] | Engineering, Environmental ; Engineering, Civil ; Environmental Sciences |
| 收录类别 | SCI |
| WOS记录号 | WOS:000278626700030 ; WOS:000278626700030 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/226947]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 推荐引用方式 GB/T 7714 | Zhang, Y,Dou, XM,Yang, M,et al. Removal of arsenate from water by using an Fe-Ce oxide adsorbent: Effects of coexistent fluoride and phosphate, Removal of arsenate from water by using an Fe-Ce oxide adsorbent: Effects of coexistent fluoride and phosphate[J]. JOURNAL OF HAZARDOUS MATERIALS, JOURNAL OF HAZARDOUS MATERIALS,2010, 2010,179, 179(1-3):#REF!, #REF!. |
| APA | Zhang, Y.,Dou, XM.,Yang, M.,He, H.,Jing, CY.,...&吴自玉.(2010).Removal of arsenate from water by using an Fe-Ce oxide adsorbent: Effects of coexistent fluoride and phosphate.JOURNAL OF HAZARDOUS MATERIALS,179(1-3),#REF!. |
| MLA | Zhang, Y,et al."Removal of arsenate from water by using an Fe-Ce oxide adsorbent: Effects of coexistent fluoride and phosphate".JOURNAL OF HAZARDOUS MATERIALS 179.1-3(2010):#REF!. |
入库方式： OAI收割
来源：高能物理研究所
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