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Bioaccumulation of cadmium bound to ferric hydroxide and particulate organic matter by the bivalve M. meretrix
- Source :
- Environmental pollution (Barking, Essex : 1987). 165
- Publication Year :
- 2011
-
Abstract
- Ferric hydroxide and particulate organic matter are important pools of trace metals in sediments and control their accumulation by benthic animals. We investigated bioaccumulation of cadmium in bivalve Meretrix meretrix by using a simplified system of laboratory synthesized iron oxides and commercially obtained humic acids to represent the inorganic and organic matrix found in nature. The results showed that bioaccumulation characteristics were distinctly different for these two substrates. Bioaccumulation from ferric hydroxide was not observed at 70 and 140 mg/kg, while the clams started to absorb Cd at 140 mg/kg from organic matter and the bioaccumulation rate was faster than that from ferric hydroxide. Within 28 d, accumulation of Cd from organic matter appeared to reach a steady state after rising to a certain level, while absorption from ferric hydroxide appeared to follow a linear profile. The findings have implications about the assimilation of trace metals from sediments by benthic animals.
- Subjects :
- chemistry.chemical_classification
Cadmium
Particulate organic matter
Health, Toxicology and Mutagenesis
chemistry.chemical_element
General Medicine
Meretrix meretrix
Toxicology
Pollution
Ferric Compounds
Bivalvia
chemistry
Benthic zone
Bioaccumulation
Environmental chemistry
Ferric hydroxide
Animals
Organic matter
Organic matrix
Water Pollutants, Chemical
Environmental Monitoring
Subjects
Details
- ISSN :
- 18736424
- Volume :
- 165
- Database :
- OpenAIRE
- Journal :
- Environmental pollution (Barking, Essex : 1987)
- Accession number :
- edsair.doi.dedup.....6ff0839e93f35bd07489463b80ef9c98