Sorptive removal of Ce(IV) from aqueous solution by bentonite

被引：7

作者：

Huang, Fengyu ^{[1
]}

Yi, Facheng ^{[1
]}

Wang, Zhe ^{[1
]}

Li, Haifeng ^{[2
]}

机构：

[1] Southwest Univ Sci & Technol, Key Subject Lab Natl Def Radioact Waste & Environ, Mianyang 621010, Peoples R China

[2] Sichuan Coll Architectural Technol, Inst Engn Surveying, Deyang 618000, Sichuan, Peoples R China

来源：

SELECTED PROCEEDINGS OF THE TENTH INTERNATIONAL CONFERENCE ON WASTE MANAGEMENT AND TECHNOLOGY | 2016年 / 31卷

关键词：

Ce(IV); Sorption; Bentonite; IONIC-STRENGTH; ADSORPTION; ATTAPULGITE; TH(IV); PH; RADIONUCLIDES; TEMPERATURE; DESORPTION; WASTE;

D O I：

10.1016/j.proenv.2016.02.073

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Bentonite has been studied extensively because of its strong adsorption capacity. A local bentonite named GMZ bentonite, collected from Gaomiaozi County (Inner Mongolia, China), was selected as the first choice of buffer/backfill material for the high-level radioactive waste repository in China. In this research, purification of raw bentonite was done to remove quartz. X-ray Diffraction(XRD) was used for the characterization of purified bentonite. In addition, the effects of contact time, solid dosage, pH, and temperature on Ce(IV) sorption to purified bentonite were also investigated by batch technique. The sorption kinetics and isotherms of bentonite for Ce(IV) indicate that the kinetic adsorption is well described by the pseudo-second-order model and the sorption isotherm is fitted well by Langmuir model. The equilibrium batch experiment data demonstrate that bentonite is effective adsorbent for the removal of Ce(IV) from aqueous solution. (C) 2016 The Authors. Published by Elsevier B.V.

引用

页码：408 / 417

页数：10

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