Biosorption and desorption of Cd^(2+) from wastewater by dehydrated shreds of Cladophora fascicularis  

作　　者：邓莉萍 朱校斌 苏营营 苏华 王新亭 

机构地区：[1]Institute of Oceanology, Chinese Academy of Sciences,Qingdao 266071, China [2]Graduate School, Chinese Academy of Sciences,Beijing 100049, China

出　　处：《Chinese Journal of Oceanology and Limnology》2008年第1期45-49,共5页中国海洋湖沼学报（英文版）

基　　金：Supported by 863 Program (No.2006AA06Z362);NSFC (No. 30530080);National Science & Technology Pillar Program (No. 2006BAB03A12)

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.The adsorption and desorption of algae Cladophora fascicularis and their relation with initial Cd^2＋ 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 Cd^2＋. With high capacities of metal biosorption and desorption, the biomass of Cladophora fascicularis is promising as a cost-effective biosorbent for the removal of Cd^2＋ from wastewater.

关 键 词：BIOSORPTION Cd^2＋ Cladophorafascicularis WASTEWATER DESORPTION desorbent 

分 类 号：X703[环境科学与工程—环境工程]