Equilibrium and thermodynamic studies of Cu(II) removal by iron oxide modified sepiolite

被引：36

作者：

Eren, E. ^{[1
]}

Gumus, H. ^{[1
]}

Ozbay, N. ^{[1
]}

机构：

[1] Bilecik Univ, Fac Arts & Sci, Dept Chem, TR-11210 Bilecik, Turkey

来源：

DESALINATION | 2010年 / 262卷 / 1-3期

关键词：

Sepiolite; Adsorption; Thermodynamic; Clay; Copper ions; HEAVY-METAL IONS; AQUEOUS-SOLUTION; ADSORPTION PROPERTIES; WASTE-WATER; COPPER; SORPTION; ZINC; DYE; MONTMORILLONITE; CLINOPTILOLITE;

D O I：

10.1016/j.desal.2010.05.039

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

This paper presents the adsorption of Cu(II) from aqueous solution by raw sepiolite (RS) and iron oxide-coated sepiolite (ICS) samples. Adsorption of Cu(II) by sepiolite samples was investigated as a function of the initial Cu(II) concentration, solution pH, ionic strength, temperature and the presence of an inorganic ligand (Cl-, SO42- and HPO42-). Changes in the surface and structure were characterized by means of XRD, IR and XRF techniques. The Langmuir monolayer adsorption capacities of RS and ICS in 0.1 M NaNO3 solution at 298 K were estimated to be 14.96 and 21.56 mg/g, respectively. Delta G, Delta H and Delta S were evaluated for RS and ICS to be -14.14 kJ/mol (at 298 K), 39.03 kJ/mol and 178 J/mol K. and -16.09 kJ/mol (at 298 K), 32.99 kJ/mol and 165 J/mol K, respectively. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：43 / 49

页数：7

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