Adsorption of thorium(IV) on MX-80 bentonite: Effect of pH, ionic strength and temperature

被引：130

作者：

Zhao, D. L. ^{[2
]}

Feng, S. J. ^{[2
]}

Chen, C. L. ^{[1
]}

Chen, S. H. ^{[2
]}

Xu, D. ^{[1
]}

Wang, X. K. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

[2] Anhui Univ Architecture, Sch Mat & Chem Engn, Hefei 230601, Anhui, Peoples R China

来源：

APPLIED CLAY SCIENCE | 2008年 / 41卷 / 1-2期

关键词：

adsorption; bentonite; thermodynamic; thorium; isotherms;

D O I：

10.1016/j.clay.2007.09.012

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The adsorption of Th(IV) on MX-80 bentonite as a function of pH, ionic strength, Th(IV) concentration and temperature was studied by using batch technique. The results indicated that the adsorption of Th(IV) on bentonite depended on pH, ionic strength and temperature. The adsorption of Th(W) decreased with increasing temperature, indicating that the adsorption process of Th(IV) on bentonite was exothermic. The experimental data of Th(W) adsorption isotherms were obtained at T=293, 303, 313, and 323K, and were analyzed with the Langmuir and Freundlich models, showing that the Langmuir model fitted the adsorption data better than the Freundlich model. Thermodynamic parameters, such as Delta H degrees, Delta S degrees, and Delta G degrees, were calculated from the slope and intercept of the linear plot of InKd against 1000/T (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：17 / 23

页数：7

共 37 条

[1] Solubility of ThO2 • xH2O(am) in carbonate solution and the formation of ternary Th(IV) hydroxide-carbonate complexes [J].

Altmaier, M ;

Neck, V ;

Müller, R ;

Fanghänel, T .

RADIOCHIMICA ACTA, 2005, 93 (02) :83-92

[2]

Altundogan HS, 2000, WASTE MANAGE, V20, P761

[3] A mechanistic description of Ni and Zn sorption on Na-montmorillonite .1. Titration and sorption measurements [J].

Baeyens, B ;

Bradbury, MH .

JOURNAL OF CONTAMINANT HYDROLOGY, 1997, 27 (3-4) :199-222

[4] Removal of Pb(II), Cd(II), Cu(II), and Zn(II) from aqueous solutions by adsorption on bentonite [J].

Bereket, G ;

Aroguz, AZ ;

Ozel, MZ .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1997, 187 (02) :338-343

[5] Influence of pH, soil humic/fulvic acid, ionic strength and foreign ions on sorption of thorium(IV) onto γ-Al2O3 [J].

Chen, C. L. ;

Wang, X. K. .

APPLIED GEOCHEMISTRY, 2007, 22 (02) :436-445

[6] Sorption of Th (IV) to silica as a function of pH, humic/fulvic acid, ionic strength, electrolyte type [J].

Chen, Changlun ;

Wang, Xiangke .

APPLIED RADIATION AND ISOTOPES, 2007, 65 (02) :155-163

[7]

Choppin GR, 1999, RADIOCHIM ACTA, V85, P89

[8]

Cromières L, 1998, RADIOCHIM ACTA, V82, P249

[9] Colloidal organic carbon and 234Th in the Gulf of Maine [J].

Dai, MH ;

Benitez-Nelson, CR .

MARINE CHEMISTRY, 2001, 74 (2-3) :181-196

[10] Thermodynamics of Pb2+ and Ni2+ adsorption onto natural bentonite from aqueous solutions [J].

Donat, R ;

Akdogan, A ;

Erdem, E ;

Cetisli, H .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2005, 286 (01) :43-52

← 1 2 3 4 →