Removal of lead ions by Unye (Turkey) bentonite in iron and magnesium oxide-coated forms

被引：74

作者：

Eren, Erdal ^{[1
]}

机构：

[1] Ahi Evran Univ, Fac Arts & Sci, Dept Chem, TR-40100 Kirsehir, Turkey

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 165卷 / 1-3期

关键词：

Bentonite; Adsorption; Thermodynamic; Clay; Lead; AQUEOUS-SOLUTION; MANGANESE OXIDE; ADSORPTION CHARACTERISTICS; SURFACE COMPLEXATION; WASTE-WATER; METAL-IONS; PB(II); COPPER; CU(II); ACID;

D O I：

10.1016/j.jhazmat.2008.09.066

中图分类号：

X [环境科学、安全科学];

学科分类号：

083001 [环境科学];

摘要：

This paper presents the adsorption of Pb(II) from aqueous solution onto Unye (Turkey) bentonite in raw (RB), iron oxide-coated (ICB) and magnesium oxide-coated (MCB) forms. Adsorption of Pb(II) by samples was investigated as a function of the initial Pb(II) concentration, solution pH, ionic strength, temperature and inorganic ligand effect (Cl-). Changes in the surface and structure were characterized by means of XRD and N-2 gas adsorption data. The Langmuir monolayer adsorption capacities of RB, ICB and MCB in 0.1 M KNO3 solution were estimated as 16.70, 22.20 and 31.86 mg/g, respectively. The spontaneity of the adsorption process is established by decrease in Delta G which varied from -21.60 to -28.60 kJ/mol (RB), -21.74 to -32.22 kJ/mol (ICB) and -26.27 to -33.11 (MCB) in temperature range 303-338 K. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：63 / 70

页数：8

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