Adsorption of hexavalent chromium on manganese nodule leached residue obtained from NH3-SO2 leaching

被引：67

作者：

Mallick, Sujata ^{[1
]}

Dash, S. S. ^{[1
]}

Parida, K. M. ^{[1
]}

机构：

[1] Reg Res Lab, Bhubaneswar 751013, Orissa, India

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2006年 / 297卷 / 02期

关键词：

manganese nodule leached residues; hexavalent chromium; adsorption; thermodynamic parameters;

D O I：

10.1016/j.jcis.2005.11.001

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：

Adsorption of hexavalent chromium onto manganese nodule leached residues Was investigating as a possible alternative to the conventional methods of its removal from aqueous synthetic solutions. Adsorption behavior was studied as a function of time, pH, temperature, and coneentration of adsorbate and adsorbent in acetic acid-sodium acetate buffer medium. Cr (VI) removal was pH dependent and was found to be of a maximum at pH 3. The applicability of the Langmuir isotherm to the present system was tested. Increased adsorption capacity with increased temperature indicates that the adsorption reaction was endothermic in nature. Based on these studies, thermodynamic parameters such as Gibbs free energy change (Delta G(0)). standard enthalpy change (Delta H-0), and standard entropy change (Delta S-0) were calculated. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：419 / 425

页数：7

共 32 条

[1]

American Public Health Association, 1985, STAND METH EX WAT WA

[2] Cr(VI) removal from synthetic wastewater using coconut shell charcoal and commercial activated carbon modified with oxidizing agents and/or chitosan [J].