Removal of copper ions by modified Unye clay, Turkey

被引：121

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 | 2008年 / 159卷 / 2-3期

关键词：

Bentonite; Adsorption; Thermodynamic; Heavy metal; Copper;

D O I：

10.1016/j.jhazmat.2008.02.035

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This paper presents the adsorption of Cu(II) from aqueous solution on modified Unye bentonite. Adsorption of Cu(II) by manganase oxide modified bentonite (MMB) sample was investigated as a function of the initial Cu(II) concentration, solution pH, ionic strength, temperature and inorganic ligands (Cl-, SO42-, HPO42-). Changes in the surfaces and structure were characterized using X-ray diffraction (XRD), infrared (IR) spectroscopy, N-2 gas adsorption and potentiometric titration data. The adsorption properties of raw bentonite (RB) were further improved by modification with manganese oxide. Langmuir monolayer adsorption capacity of the MMB (105.38 mg/g) was found greater than that of the raw bentonite (42.41 mg/g). The spontaneity of the adsorption process is established by decrease in Delta G which varied from -4.68 to -5.10 kJ mol(-1) in temperature range 303-313 K. The high performance exhibited by MMB was attributed to increased surface area and higher negative surface charge after modification. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：235 / 244

页数：10

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