Arsenate adsorption on an Fe-Ce bimetal oxide adsorbent: EXAFS study and surface complexation modeling
Dou, XM; Zhang, Y; Zhao, B; Wu, XM; Wu, ZY; Yang, M; Wu ZY(吴自玉)
刊名COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
2011
卷号379期号:1-3 SI页码:#REF!
关键词Arsenate Adsorption Fe-Ce bimetal oxide Surface complexes EXAFS CD-MUSIC model
学科分类Chemistry
DOI10.1016/j.colsurfa.2010.11.043
通讯作者Zhang, Y (reprint author), Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China.
文章类型Article; Proceedings Paper
英文摘要The mechanism of arsenate (As(V)) adsorption on an Fe-Ce bimetal (hydrous) oxide (Fe-Ce) was investigated using complementary analysis techniques including extended X-ray absorption fine structure (EXAFS) and surface complexation modeling. The As K-edge EXAFS spectra showed that the second peak of Fe-Ce after As(V) adsorption was the As-Fe shell, which supported the finding that As(V) adsorption occurred mainly at the Fe surface active sites. Two As-Fe distances of 3.30 angstrom and 3.55 angstrom were observed from the EXAFS spectra of As(V) adsorbed samples at three pH levels (5.0, 7.6, and 9.0) and two initial surface loadings of 70 and 130 mg/g, which indicated that monodentate mononuclear and bidentate binuclear As surface complexes coexisted. When compared with the reported dominant species of bidentate binuclear complex for As existing on iron (hydro)oxides, the existence of Ce atoms in the bimetal oxide and the high surface loading were the likely reasons for the existence of the monodentate complex. A Charge Distribution-Multi-site Sites Complexation (CD-MUSIC) model showed that protonated monodentate (MH) and deprotonated bidentate (B) complexes preferred to exist on the Fe-Ce surface in a high surface loading range (Gamma = 5.11-14.4 mu mol/m(2)). The MH complex was shown to be dominant at pH < 8. Based on the results from EXAFS analysis and the CD-MUSIC model, the adsorptive behavior of As(V) on Fe-Ce with high surface loadings was satisfactorily interpreted and understood. (C) 2010 Elsevier B.V. All rights reserved.
类目[WOS]Chemistry, Physical
收录类别SCI
WOS记录号WOS:000289920200017
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226212
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
推荐引用方式
GB/T 7714
Dou, XM,Zhang, Y,Zhao, B,et al. Arsenate adsorption on an Fe-Ce bimetal oxide adsorbent: EXAFS study and surface complexation modeling[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2011,379(1-3 SI):#REF!.
APA Dou, XM.,Zhang, Y.,Zhao, B.,Wu, XM.,Wu, ZY.,...&吴自玉.(2011).Arsenate adsorption on an Fe-Ce bimetal oxide adsorbent: EXAFS study and surface complexation modeling.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,379(1-3 SI),#REF!.
MLA Dou, XM,et al."Arsenate adsorption on an Fe-Ce bimetal oxide adsorbent: EXAFS study and surface complexation modeling".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 379.1-3 SI(2011):#REF!.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
1239.pdf(683KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Dou, XM]的文章
[Zhang, Y]的文章
[Zhao, B]的文章
百度学术
百度学术中相似的文章
[Dou, XM]的文章
[Zhang, Y]的文章
[Zhao, B]的文章
必应学术
必应学术中相似的文章
[Dou, XM]的文章
[Zhang, Y]的文章
[Zhao, B]的文章
相关权益政策
暂无数据
收藏/分享
文件名: 1239.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

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。