Biosorption and desorption of Cd2+ from wastewater by dehydrated shreds of Cladophora fascicularis

被引：25

作者：

Deng Liping ^{[1
,2
]}

Zhu Xiaobin ^{[1
]}

Su Yingying ^{[1
,2
]}

Su Hua ^{[1
,2
]}

Wang Xinting ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY | 2008年 / 26卷 / 01期

基金：

中国国家自然科学基金;

关键词：

biosorption; Cd2+; Cladophora fascicularis; wastewater; desorption; desorbent;

D O I：

10.1007/s00343-008-0045-0

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The adsorption and desorption of algae Cladophora fascicularis and their relation with initial Cd2+ concentration, initial pH, and co-existing ions were studied. Adsorption equilibrium and biosorption kinetics were established from batch experiments. The adsorption equilibrium was adequately described by the Langmuir isotherm, and biosorption kinetics was in pseudo-second order model. The experiment on co-existing ions showed that the biosorption capacity of biomass decreased with an increasing concentration of competing ions. Desorption experiments indicated that EDTA was efficient desorbent for recovery from Cd2+. With high capacities of metal biosorption and desorption, the biomass of Cladophora fascicularis is promising as a cost-effective biosorbent for the removal of Cd2+ from wastewater.

引用

页码：45 / 49

页数：5