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Historical Contamination and Sources of Organochiorine Pesticides in Sediment Cores from Xiaohai Bay,Hainan Province,China

【摘要】:正Collect three sediment cores in Xiaohai Bay;the concentration of the surface sediments is lawer than in Xiamen Habor and Quanzhou Bay,but higher than in Minjiang,Daya,Pearl The concentration of XHZH03 core which is located at the neck of Xiaohai Bay,near to the South Sea,is the highest in all cores.XHZH03 is the interchange place for freshwater and salt water,flocculation precipitation action is strong,which is favor for sedimentation accumulation of organic pesticides.There are different sediment condition for deep sediment and surface sediment.DDTs at deep sediment were aged and mainly originated from weathered agricultural soils, and surface sediment had new DDT pesticide inputs.The sediment core was polluted by aquiculture mainly.

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