Details

Autor(en) / Beteiligte

• Yang, Yun H.
• Zhou, Shan S.
• Li, Yuan Y.
• Xue, Bin
• Liu, Teng

Titel

Residues and chiral signatures of organochlorine pesticides in sediments from Xiangshan Bay, East China Sea

Ist Teil von

• Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes, 2011-01, Vol.46 (2), p.105-111

Ort / Verlag

Philadelphia, PA: Taylor & Francis Group

Erscheinungsjahr

2011

Quelle

Taylor & Francis

Beschreibungen/Notizen

• Residual levels and enantiomeric signatures of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) in surface sediments from Xiangshan Bay, East China Sea were investigated. The concentrations of ∑HCHs (sums of α-, β-, γ-, and δ-HCH) and ∑DDTs (sums of p, p′-DDT, p, p′-DDD,p, p′-DDE, o, p′-DDT, and o, p′-DDD) ranged from 0.14 to 0.67 ng g −1 and 0.61 to 22.38 ng g −1 , respectively. A slight potential health risk to the organism was then indicated for the residual levels of DDTs according to the ERL/ERM guidelines. Moreover, the predominant β-HCH implied that the technical HCH contamination was mainly due to the historical usage. But the high ratio of DDT/∑DDTs depicted a cocktail input pattern of fresh and weathered DDTs. The enantiomeric fractions (EFs) of α-HCH, o, p′-DDT, and o, p′-DDD were also determined. The degradation of α-HCH was enantioselective in all sediments samples, resulting in an enrichment of (-)-enantiomers. However, the racemic residues of o, p′-DDT and o, p′-DDD were observed in all sediments samples.