Competitive adsorption of Hg2+, Pb2+ and Co2+ ions on polyacrylamide/attapulgite

被引：73

作者：

Zhou, Shouyong ^{[1
]}

Xue, Ailian ^{[1
]}

Zhao, Yijiang ^{[1
]}

Wang, Qiwei ^{[1
]}

Chen, Yan ^{[2
]}

Li, Meisheng ^{[1
]}

Xing, Weihong ^{[3
]}

机构：

[1] Huaiyin Normal Univ, Sch Chem & Chem Engn, Key Lab Chem Low Dimens Mat Jiangsu Prov, Huaian 223300, Jiangsu Prov, Peoples R China

[2] Jiangsu Salt Grp Co LTD, Nanjing 210000, Jiangsu Prov, Peoples R China

[3] Nanjing Univ Technol, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu Prov, Peoples R China

来源：

DESALINATION | 2011年 / 270卷 / 1-3期

关键词：

Attapulgite; Polyacrylamide; Heavy metal ions; Competitive adsorption; Selectivity; TRANSFER RADICAL POLYMERIZATION; LOW-COST ADSORBENTS; AQUEOUS-SOLUTIONS; HEAVY-METALS; ACTIVATED PALYGORSKITE; SELECTIVE ADSORPTION; MERCURY REMOVAL; WASTEWATERS; SORPTION; CELLULOSE;

D O I：

10.1016/j.desal.2010.11.055

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

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.

引用

页码：269 / 274

页数：6

共 45 条

[1] Recovery of silver from industrial wastes, cassava solution effects [J].