期刊
ENVIRONMENTAL POLLUTION
卷 168, 期 -, 页码 138-144出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2012.03.048
关键词
Carbon nanotube; Perfluorooctanoate; Hydrophobic interaction; Electrostatic interaction; Sorption mechanism
资金
- National Nature Science Foundation of China [21177070, 50838002]
- State Key Joint Laboratory of Environment Simulation and Pollution [10Y01ESPCT]
- Tsinghua University Initiative Scientific Research Program [Z02-2-20101081813]
- Laboratory Fund of Tsinghua University
Sorption of perfluorinated compounds (PFCs) on carbon nanotubes (CNTs) is critical for understanding their subsequent transport and fate in aqueous environments, but the sorption mechanisms remain largely unknown. In this study, the sorption of six PFCs on CNTs increased with increasing C-F chain length when they had a same functional group, and the CNTs with hydroxyl and carboxyl groups had much lower adsorbed amount than the pristine CNTs, indicating that hydrophobic interaction dominated the sorption of PFCs on the CNTs. Electrostatic repulsion suppressed the sorption of PFCs on the CNTs, resulting in the lower sorption with increasing pH. Hydrogen bonding interaction was negligible. The hydrophobic C-F chains can be closely adsorbed on the CNTs surface in parallel to the axis or along the curvature, making it impossible to form micelles on the CNT surface, leading to the lower sorption than other adsorbents. (c) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据