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Organochlorine pesticides and PCBs along the coast of north Vietnam.
- Source :
-
The Science of the total environment [Sci Total Environ] 1999 Sep 30; Vol. 237-238, pp. 363-71. - Publication Year :
- 1999
-
Abstract
- Organochlorine pesticides and polychlorinated biphenyls (PCBs) were determined in sediments and clams collected from the coast of the north of Vietnam during the rainy season (August-September 1997). Results show that the organochlorine pesticides of major concern are HCHs (1.2-33.7 ng g-1 dry wt.), DDTs (6.2-10.4 ng g-1 dry wt.) and HCB (0.1-6.5 ng g-1 dry wt.). PCBs, in aroclor 1254 equivalents, were also generally present in concentrations ranging from 0.47 to 28.1 ng g-1 sediment dry wt. Concentrations measured in the soft tissues of clams (Meretrix meretrix) generally reflect the level of contamination at the sampling sites. In the clams, the concentrations of DDTs (12.0-23.3 ng g-1 dry wt.) and PCBs (5.1-25.3 ng g-1 dry wt.) were generally higher than those of other chlorinated hydrocarbons. These results underscore the need to improved environmental protection measures in order to reduce the exposure of the population to these persistent and bioaccumulative compounds through food ingestion.
- Subjects :
- Animals
Bivalvia metabolism
Environmental Exposure analysis
Environmental Exposure statistics & numerical data
Environmental Monitoring statistics & numerical data
Insecticides metabolism
Pacific Ocean
Polychlorinated Biphenyls metabolism
Vietnam
Water Pollution, Chemical statistics & numerical data
Bivalvia chemistry
Geologic Sediments chemistry
Insecticides analysis
Polychlorinated Biphenyls analysis
Water Pollutants, Chemical analysis
Water Pollution, Chemical analysis
Subjects
Details
- Language :
- English
- ISSN :
- 0048-9697
- Volume :
- 237-238
- Database :
- MEDLINE
- Journal :
- The Science of the total environment
- Publication Type :
- Academic Journal
- Accession number :
- 10568288
- Full Text :
- https://doi.org/10.1016/s0048-9697(99)00149-7