Chitosan Oligosaccharide-Ca Complex Accelerates the Depuration of Cadmium from Chlamys ferrari  

作　　者：HUANG Guoqing SUN Jipeng WANG Dongfeng XU Ying XU Wei 

机构地区：[1]College of Food Science and Engineering,Ocean University of China,Qingdao 266003,P.R.China [2]College of Food Science and Engineering,Qingdao Agricultural University,Qingdao 266009,P.R.China

出　　处：《Journal of Ocean University of China》2012年第2期219-226,共8页中国海洋大学学报（英文版）

基　　金：supported by grants of the National Key Technology Research and Development Program in the 11th Five-Year Plan of China (2008BAD94B\09);the National Natural Science Foundation of China (Grant No. 30972289)

摘　　要：This study investigated the effect of a chitosan oligosaccharide-Ca complex (COS-Ca) on the depuration of cadmium (Cd) from Chlamys ferrari. After exposure to 0.5 mg L-1 CdCl2 for 3 or 7 d, the scallops were treated by COS-Ca prior to determina-tion of Cd, calcium (Ca) and zinc (Zn) contents, Cd distribution in organs, malondialdehyde (MDA) content and antioxidant variables. Results showed that COS-Ca reduced Cd content in the viscera of the scallops, with highest Cd depuration rate (47%) observed on day 3. The COS-Ca concentration substantially affected Cd depuration, and the exposure to 8.75 mg L-1 COS-Ca led to significantly higher Cd depuration rate compared with those of lower COS-Ca concentrations (1.75, 3.5, 5.25, and 7.00 mg L-1). Distribution analysis of Cd in scallop organs indicated that COS-Ca significantly reduced Cd content in the kidney throughout the 5-d experiment, as well as in the gill during the early stage of Cd depuration. In addition, COS-Ca treatment decreased glutathione peroxidase (GSH-Px) activity and MDA content while increasing superoxide dismutase (SOD) and catalase (CAT) activities on different days. Our work suggested COS-Ca complex treatment as an effective method for acceleration of Cd depuration from Cd-contaminated bivalves.This study investigated the effect of a chitosan oligosaccharide-Ca complex （COS-Ca） on the depuration of cadmium （Cd） from Chlamys ferrari. After exposure to 0.5 mg L-1 CdCl2 for 3 or 7 d, the scallops were treated by COS-Ca prior to determina-tion of Cd, calcium （Ca） and zinc （Zn） contents, Cd distribution in organs, malondialdehyde （MDA） content and antioxidant variables. Results showed that COS-Ca reduced Cd content in the viscera of the scallops, with highest Cd depuration rate （47%） observed on day 3. The COS-Ca concentration substantially affected Cd depuration, and the exposure to 8.75 mg L-1 COS-Ca led to significantly higher Cd depuration rate compared with those of lower COS-Ca concentrations （1.75, 3.5, 5.25, and 7.00 mg L-1）. Distribution analysis of Cd in scallop organs indicated that COS-Ca significantly reduced Cd content in the kidney throughout the 5-d experiment, as well as in the gill during the early stage of Cd depuration. In addition, COS-Ca treatment decreased glutathione peroxidase （GSH-Px） activity and MDA content while increasing superoxide dismutase （SOD） and catalase （CAT） activities on different days. Our work suggested COS-Ca complex treatment as an effective method for acceleration of Cd depuration from Cd-contaminated bivalves.

关 键 词：Chitosan oligosaccharide calcium complex cadmium depuration Chlamys Ferrari 

分 类 号：X171[环境科学与工程—环境科学] X703