Document Detail


Bioaccumulation of cadmium bound to humic acid by the bivalve Meretrix meretirx linnaeus from solute and particulate pathways.
MedLine Citation:
PMID:  20397406     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Humic acid is an important pool of heavy metals in sediments. Generally, the presence of refractory humic matter in aquatic systems would decrease the bioavailability of Cd and hence control the bioaccumulation of Cd in benthic animals. In the present work, we applied a suspending system to determine the relative importance of particulate and dissolved fractions of humic acid as Cd sources for the bivalve Meretrix meretrix and to investigate the difference of bioaccumulation characteristics of Cd adsorbed on different fractions of humic acid. The results showed that the bioaccumulation characteristics of Cd from particulate and dissolved fractions of humic acid were apparently different due to biological responses of the clam to the particulates. At Cd concentration of 140 mg/kg, the accumulation of Cd from Cd associated with humic acid mixtures was mainly attributed to the dissolved fractions of humic acid. Compared to particulate fractions, Cd associated with the dissolved fractions of humic acid may be more bioavailable.
Authors:
Xing Wu; Yongfeng Jia; Huijie Zhu; He Wang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental sciences (China)     Volume:  22     ISSN:  1001-0742     ISO Abbreviation:  J Environ Sci (China)     Publication Date:  2010  
Date Detail:
Created Date:  2010-04-19     Completed Date:  2010-05-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100967627     Medline TA:  J Environ Sci (China)     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  198-203     Citation Subset:  IM    
Affiliation:
Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shengyang 110016, China. wuxing@yahoo.cn
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MeSH Terms
Descriptor/Qualifier:
Animals
Bivalvia / metabolism*
Cadmium / chemistry*,  metabolism*
Environmental Monitoring
Humic Substances / analysis*
Water Pollutants, Chemical
Chemical
Reg. No./Substance:
0/Humic Substances; 0/Water Pollutants, Chemical; 7440-43-9/Cadmium

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