Concentration and Bioaccumulation of Dechlorane Compounds in Coastal Environment of Northern China

• Published in: Environmental science & technology Vol. 45; no. 7; pp. 2613 - 2618
• Main Authors: Jia, Hongliang, Sun, Yeqing, Liu, Xianjie, Yang, Meng, Wang, Degao, Qi, Hong, Shen, Li, Sverko, Ed, Reiner, Eric J, Li, Yi-Fan
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.04.2011
• Subjects: Animals; Applied sciences; Characterization of Natural and Affected Environments; Chemical compounds; China; Contamination; Correlation analysis; Environmental Monitoring; Exact sciences and technology; Flame Retardants - analysis; Flame Retardants - metabolism; Hydrocarbons, Chlorinated - analysis; Hydrocarbons, Chlorinated - metabolism; Mirex - analysis; Mirex - metabolism; Ostreidae - metabolism; Oysters; Pollution; Polycyclic Compounds - analysis; Polycyclic Compounds - metabolism; Regression Analysis; Seawater - chemistry; Sediments; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - metabolism; Asia; Yellow Sea; China; Bohai Sea; Marine sediments; Insecticide; Pesticides; Mirex; Flame retardant; Organic chlorine compounds; Coastal zone; Marine environment; Persistent organic pollutant; Gas chromatography; Dechlorane; Bivalvia; Dechlorane plus; Water pollution; Invertebrata; Mollusca; Biological accumulation; Mass spectrometry; Organic compounds; Concentration distribution; Seawater
• ISSN: 0013-936X; 1520-5851
• DOI: 10.1021/es103723h

Dechloranes, including Dechlorane Plus (DP), Mirex (Dechlorane), Dechlorane 602 (Dec 602), Dechlorane 603 (Dec 603), and Dechlorane 604 (Dec 604), were determined using GC-MSD for water, sediment and oyster samples collected at 15 sampling sites near the Bohai and Huanghai Sea shore area of northern China in 2008. DP and Mirex were detected in most water, sediment, and oyster samples, which indicated widespread distribution of these two compounds. The mean concentrations in water, sediment and oyster samples, respectively, were 1.8 ng/L, 2.9 ng/g dry weight (dw) and 4.1 ng/g wet weight (ww) for total DP, and 0.29 ng/L, 0.90 ng/g dw, and 2.0 ng/g ww for Mirex. Dec 602 and Dec 603 were not detected in water but in small portions of the sediment and oyster samples, showing a low level of contamination by these two chemicals in the region. Strong and significant correlations were found between total DP and Mirex concentrations in water, sediment and oyster samples, probably suggesting similar local sources of these two chemicals. Dec 604 was not found in any samples. The biota-sediment accumulation factor (BSAF) of DP, Mirex, and Dec 602 declined along with the increase of their logarithm of octanol−water partition coefficients (log K ow), possibly indicating that compounds with lower log K ow (like Mirex and Dec 602) accumulated more readily in biota. The mean fractional abundance of syn-DP (f syn) was 0.34 in water samples, a value lower than that in Chinese commercial mixture (0.41), while the mean f syn for surface sediment (0.44) and oyster (0.45) samples were higher than technical values. Enrichment of syn-DP in oyster was in agreement with previously reported findings in Great Lakes fish. Enrichment of syn-DP in marine surface sediments, however, is contrary to data reported for fresh water sediments. To our knowledge this is the first report of Dec 602, Dec 603, and Dec 604 in a marine environment and also the first report of Dechloranes in marine biota.