Mechanistic study of simultaneous arsenic and fluoride removal using granular TiO2-La adsorbent
文献类型：期刊论文
| 作者 | Yan, Li; Tu, Haowei; Chan, Tingshan; Jing, Chuanyong |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2017-04-01 |
| 卷号 | 313期号:0页码:983-992 |
| 关键词 | Coexisting As And f Hybrid Tio2-la Adsorbent Crystal Facets Orientated Growth Molecular-level Mechanisms |
| 英文摘要 | Naturally co-occurring arsenic (As) and fluoride (F) in groundwater have caused increasing public concerns, and their simultaneous removal is still a challenge due to the lack of efficient adsorptive materials and their competition for adsorption sites. This study fabricated a novel TiO2-La granular composite adsorbent with LaCO3OH showing orientated growth on TiO2 {100) facet. The material exhibited high As(III) (114 mg/g) and F (78.4 mg/g) adsorption capacities and a wide application pH, ranging 3-9, achieving a high percentage (>90%) of As(III) and F adsorption. Coadsorption experiment results demonstrated that high F concentrations inhibit As(III) adsorption, whereas the coexisting As(III) has no significant effect on F removal. The molecular-level mechanisms with EXAFS and DFT studies demonstrated that As(III) adsorption is favorable only on Ti sites as evidenced by an As-Ti distance of 3.36 angstrom when pH < 7, while La adsorption sites can also be occupied with an As-La distance at 3.42 angstrom when pH > 10. The F adsorption is pH-dependent and mainly occurred on La sites. The granular TiO2-La with high As (III) and F adsorption capacities can be used to simultaneously remove As(III) and F. The insights gained from this study shed a new light on the interaction mechanism of As(III) and F with the TiO2-La composite. (C) 2016 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39359]  |
| 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 |
| 推荐引用方式 GB/T 7714 | Yan, Li,Tu, Haowei,Chan, Tingshan,et al. Mechanistic study of simultaneous arsenic and fluoride removal using granular TiO2-La adsorbent[J]. CHEMICAL ENGINEERING JOURNAL,2017,313(0):983-992. |
| APA | Yan, Li,Tu, Haowei,Chan, Tingshan,&Jing, Chuanyong.(2017).Mechanistic study of simultaneous arsenic and fluoride removal using granular TiO2-La adsorbent.CHEMICAL ENGINEERING JOURNAL,313(0),983-992. |
| MLA | Yan, Li,et al."Mechanistic study of simultaneous arsenic and fluoride removal using granular TiO2-La adsorbent".CHEMICAL ENGINEERING JOURNAL 313.0(2017):983-992. |
入库方式： OAI收割
来源：生态环境研究中心
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