期刊
ENVIRONMENTAL POLLUTION
卷 206, 期 -, 页码 38-48出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2015.06.023
关键词
POPs; Sediment quality; Water column; The Scheldt; Ecotoxicological risk
资金
- Nord-Pas-de-Calais Region
- Foundation for Biodiversity Research (FRB)
- Agence de l'Eau Artois Picardie (AEAP)
The occurrence of three groups of hazardous organic contaminants (PCBs, PAHs, Me-PAHs) in fifteen watercourses and rivers located in highly urbanized and industrialized zones was studied. The distribution of 62 organic contaminants was determined in three matrices: in the dissolved phase, associated with suspended solid matter (SSM) and in sediment. Their distributions in the aquatic environment depend strongly on their physicochemical properties. Low molecular weight PAHs were predominant in the dissolved phase while those with high molecular weight accumulated preferentially in SSM and sediments. Among the 28 PCBs congeners, only PCB153 was detected. The results showed that the contamination of these areas originated mainly from combustion processes. The three the most polluted sites identified are surrounded by big cities. Ecotoxicological assessment based on the international Sediment Quality Guidelines (SQGs) showed that the toxic effects of the sediment in these watercourses and rivers occurred due to high levels of hydrocarbons. (C) 2015 Elsevier Ltd. All rights reserved.
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