Journal
CHEMOSPHERE
Volume 202, Issue -, Pages 255-263Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2018.03.108
Keywords
Taihu lake; Organophosphate esters; Distribution; Potential sources; Exposure risk assessment
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Funding
- National Natural Science Foundation of China [21507165, 21507036]
- Natural Science Foundation of Jiangsu Province, China [BK20140115]
- Special Fund for Environmental Protection Research in the Public Interest [201409040]
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Organophosphate esters (OPEs) are ubiquitous in the aquatic environment, which have been considered or suspected as carcinogens and neurotoxicants. In this study, the occurrence, spatial distribution, potential sources, partitioning character and potential risks of OPEs in the surface water and sediment collected from Taihu Lake were investigated. The concentrations of Sigma 12 OPEs varied from 1.0 x 10(2) to 1.7 x 10(3) ng/L for the surface water and from 8.1 to 4.2 x 10(2) ng/g dw for the sediment. Trimethyl phosphate (TEP) was the predominant congener in the surface water, while Tris(2-ethylhexyl) phosphate (TEHP) in the sediment. Positive correlations between OPEs indicated that they may have the same sources and/or similar environmental behavior. The pseudo-partitioning values of OPEs ranged from 0.59 to 6.5 x 10(4) L/kg. TEHP has the highest pseudo-partitioning coefficient, which indicated that TEHP inclined to be enriched in the sediment in Taihu Lake. Risk assessment (RQ) showed that individual OPEs in the surface water and sediment posed no/low risk to aquatic organisms, except 2-Ethylhexyl diphenyl phosphate (EHDPP) (moderate risk) in water. (C) 2018 Elsevier Ltd. All rights reserved.
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