Mechanistic study of PFOS adsorption on kaolinite and montmorillonite
文献类型：期刊论文
| 作者 | Zhang, Ruiming ; Yan, Wei ; Jing, Chuanyong |
| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2014 |
| 卷号 | 462期号:1页码:252-258 |
| 关键词 | Adsorption Perfluorooctane sulfonate (PFOS) Kaolinite Montmorillonite Chemisorption Outer sphere complexes |
| ISSN号 | 0927-7757 |
| 中文摘要 | Adsorption of perfluorooctane sulfonate (PFOS) on clay minerals is pivotal in the fate and transport of PFOS in the environment. Understanding the PFOS adsorption mechanisms, however, presents challenges, especially in the presence of natural organic substances. In this study, the adsorption mechanism of PFOS on kaolinite and montmorillonite, with and without humic acids (HA), were investigated using batch experiments, ATR-FTIR spectroscopy, zeta potential, NEXAFS, and XRD. The results showed that PFOS had a higher adsorption capacity on kaolinite than on montmorillonite, both with a rapid formation of an outer-sphere complex followed by a slow ligand exchange reaction with the elimination of adsorbed H2O molecules. In addition to nonspecific hydrophobic and electrostatic interactions, specific chemisorption also exists between sulfonate group of PFOS and hydroxyl group on surfaces of clay minerals. The HA coating on clay materials inhibited PFOS adsorption due to its occupation of adsorption sites and increased electrostatic repulsion. The insights gained from this study improve our understanding on the mechanism of multilateral forces on PFOS adsorption at the molecular level. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000344187100033 |
| 公开日期 | 2015-03-24 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9402]  |
| 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 | Zhang, Ruiming,Yan, Wei,Jing, Chuanyong. Mechanistic study of PFOS adsorption on kaolinite and montmorillonite[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2014,462(1):252-258. |
| APA | Zhang, Ruiming,Yan, Wei,&Jing, Chuanyong.(2014).Mechanistic study of PFOS adsorption on kaolinite and montmorillonite.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,462(1),252-258. |
| MLA | Zhang, Ruiming,et al."Mechanistic study of PFOS adsorption on kaolinite and montmorillonite".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 462.1(2014):252-258. |
入库方式： OAI收割
来源：生态环境研究中心
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