期刊
DESALINATION
卷 270, 期 1-3, 页码 269-274出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.desal.2010.11.055
关键词
Attapulgite; Polyacrylamide; Heavy metal ions; Competitive adsorption; Selectivity
资金
- National Natural Science Fundation of China [20976067]
- Natural Science Fundation of Jiangsu Education Department [09KJA530001]
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials [JSKC09070]
- Young Elite Talents of Huaiyin Teachers College [06QNZC026]
- Science and Technology Development of Huaian [HAG08041]
In the present study, the competitive adsorption characteristics of binary and ternary heavy metal ions Hg2+. Pb2+ and Co2+ on polyacrylamide/attapulgite (PAM/ATP) were investigated in batch systems. PAM/ATP was prepared by the solution polymerization of acrylamide (AM) onto gamma-methacryloxypropyl trimethoxy silane (KH-570) modified attapulgite (ATP) and characterized by the technique of X-ray photoelectron spectroscopy (XPS). Equilibrium and kinetic adsorption data showed that PAM/ATP displays a high selectivity towards one metal in a two-component or a three-component system with an affinity order of Hg2+ > Pb2+ > Co2+. The equilibrium behaviors of heavy metal species with stronger affinity toward PAM/ATP can be described by the Langmuir equation while the adsorption kinetics of the metals can be well fitted to a pseudo-second-order kinetic model. Desorption was performed using hot acetic acid, and the regenerated adsorbents could be reused with little loss of adsorption capacity. (C) 2010 Elsevier B.V. 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