Isotherm model analysis for the adsorption of Cd (II), Cu (II), Ni (II), and Zn (II) on anaerobically digested sludge

被引：40

作者：

Artola, A ^{[1
]}

Martin, M ^{[1
]}

Balaguer, MD ^{[1
]}

Rigola, M ^{[1
]}

机构：

[1] Univ Girona, Fac Ciencies, Dept Engn Quim Agr & Tecnol Agroalimentaria, Lab Engn Quim & Ambiental, Girona 17071, Spain

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2000年 / 232卷 / 01期

关键词：

heavy metals; digested sludge; metal affinity; adsorption isotherms; multimetal system; desorbing agent;

D O I：

10.1006/jcis.2000.7186

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 Cd (II), Cu (II), Ni (II), and Zn (II) from aqueous solutions on anaerobically digested sludge has been investigated. Experimental data has been fit to Langmuir, Freundlich, and Redlich-Peterson isotherms to obtain the characteristic parameters of each model. Based on the maximum adsorption capacity obtained from the Langmuir and the Redlich-Peterson isotherm the affinity of the studied metals for the sludge has been established as Cu (II) > Cd (II) > Zn (II)> Ni (II). Adsorption tests from multi-metal systems confirm the affinity order obtained in the individual metal tests. The adsorption capacity for Cu (II) measured in individual tests is not reduced by the presence of the other above referred metals. Desorption of Zn (II) and Cd (II) previously bound to the sludge in front of Cu (II) and HCl solutions is also reported. (C) 2000 Academic Press.

引用

页码：64 / 70

页数：7

共 45 条

[1] DESORPTION OF CADMIUM FROM ALGAL BIOSORBENT [J].