Competitive adsorption of arsenic and fluoride on {201} TiO2
文献类型：期刊论文
| 作者 | Zhou, Zhen; Yu, Yaqin; Ding, Zhaoxia; Zuo, Meimei; Jing, Chuanyong |
| 刊名 | APPLIED SURFACE SCIENCE
 |
| 出版日期 | 2019-02-01 |
| 卷号 | 466页码:425-432 |
| 关键词 | Arsenic Fluoride High-index TiO2 Competitive adsorption Molecular level mechanism |
| ISSN号 | 0169-4332 |
| 英文摘要 | Elevated arsenic (As) and fluoride (F) in natural water present an urgent environmental concern. The demand for their effective removal underscores the fundamental understanding of their solid-liquid interface chemistry. Herein, the efficiency of {2 0 1} TiO2 in As(III/V) and F was explored using macroscopic and molecular-level techniques. Their adsorption isotherms followed the Langmuir equation, and the maximum adsorption capacity was 50.5, 29.3, and 5.0 mg/g for As(III), As(V) and F, respectively. Their adsorption kinetics of As(III), As(V) and F conformed to the pseudo-second-order model. The XPS and in situ ATR-FTIR results identified that the active adsorption sites on {2 0 1} TiO2 included surface hydroxyl groups, but not oxygen vacancies. As(III/V) and F form bidentate binuclear and monodentate mononuclear structures, respectively, regardless of exposed facets. Integrated with the molecular-level mechanism, the charge distribution multisite complexation model well predicted the pH edge behaviors in mono- and co-component systems. The shift of pH(PZC) of {2 0 1} TiO2 in competitive adsorption systems signified the formation of inner-sphere complexes. The results of this study shed new lights on the adsorption of coexisting ions using high-index faceted TiO2. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/42919]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 2.Army Logist Univ, Dept Mil Facil, Chongqing 401311, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Zhen,Yu, Yaqin,Ding, Zhaoxia,et al. Competitive adsorption of arsenic and fluoride on {201} TiO2[J]. APPLIED SURFACE SCIENCE,2019,466:425-432. |
| APA | Zhou, Zhen,Yu, Yaqin,Ding, Zhaoxia,Zuo, Meimei,&Jing, Chuanyong.(2019).Competitive adsorption of arsenic and fluoride on {201} TiO2.APPLIED SURFACE SCIENCE,466,425-432. |
| MLA | Zhou, Zhen,et al."Competitive adsorption of arsenic and fluoride on {201} TiO2".APPLIED SURFACE SCIENCE 466(2019):425-432. |
入库方式： OAI收割
来源：生态环境研究中心
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