Removal of lead ions by acid activated and manganese oxide-coated bentonite

被引：182

作者：

Eren, E. ^{[1
]}

Afsin, B. ^{[2
]}

Onal, Y. ^{[3
]}

机构：

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

[2] Ondokuz Mayis Univ, Fac Arts & Sci, Dept Chem, TR-55139 Kurupelit, Turkey

[3] Inonu Univ, Fac Engn, Dept Chem Engn, TR-44280 Malatya, Turkey

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 161卷 / 2-3期

关键词：

Bentonite; Adsorption; Thermodynamic; Manganese oxide; Lead; AQUEOUS-SOLUTION; ADSORPTION CHARACTERISTICS; MX-80; BENTONITE; PB(II); THERMODYNAMICS; EXCHANGE; CU2+; NI2+; IR; MONTMORILLONITE;

D O I：

10.1016/j.jhazmat.2008.04.020

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 Pb(II) from aqua solutions onto Unye (Turkey) bentonite in raw (RB), acid activated (AAB) and manganese oxide-coated (MCB) forms. Adsorption of Pb(H) by RB, AAB and MCB sample was investigated as a function of the initial Pb(II) concentration, solution pH, ionic strength, temperature and inorganic ligand (Cl-). Changes in the surfaces and structure were characterized by means of XRD, IR and potentiometric titration. The Langmuir monolayer adsorption capacities of RB, AAB and MCB in 0.1 M KNO3 solution were estimated as 16.70, 8.92 and 58.88 mg/g, respectively. The spontaneity of the adsorption process is established by decrease in Delta G which varied from -21.60 to -28.60kJ/mol (RB), -22.63 to -29.98 kJ/moI (AAB) and -19.57 to -26.22 (MCB) in temperature range 303-338 K. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：677 / 685

页数：9

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