Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 466, Issue -, Pages 214-220Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2013.07.027
Keywords
OCPs; Mariculture; Sediments; HCHs; DDTs; Pesticides
Categories
Funding
- National Natural Science Foundation of China [31101071]
- State Key Laboratory in Marine Pollution [SCRF0003]
- National Basic Research Program of China (973 Program) [2011CB9358003]
- China Postdoctoral Science Foundation [2012M511868]
- Fundamental Research Funds for the Central Universities (Sun Yat-sen University) [12ykpy09]
- Science and Technology Planning Project of Guangdong Province, China [2012B031500005]
- Canada Research Chair program
- State Administration of Foreign Experts Affairs, the P.R. China [GDW20123200120]
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To evaluate contamination of sediments along the coast of Hong Kong and adjacent mainland China, concentrations of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) in surface and core sediments were measured in six mariculture zones. In surface sediments (0 to 5 cm), concentrations of Sigma HCHs and Sigma DDTs in mariculture sediments were approximately 1.3- and 7.7-fold greater, respectively, than those detected in sediments at corresponding reference sites, which were 1 to 2 km away in areas where there was no mariculture. Similarly, in cores of sediments, concentrations of Sigma HCHs and Sigma DDTs were 1.2- and 14-fold greater in mariculture zones, respectively. Enrichment relative to regional background concentrations, expressed as percentages was as large as 8.67 x 10(3)% for o,p'-DDD. The major sources of the enriched organochlorine pesticides (OCPs) were hypothesized to be derived from the use of contaminated fish feeds and anti-fouling paints for maintaining fish cages. Results of ecological risk assessments revealed that enriched OCPs had a large potential to contaminate the surrounding marine environment and lead to adverse effects on the associated biota. To our knowledge, this is the first study to evaluate the differences of OCP contaminations between mariculture and natural coastal sediments. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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