海陵湾沉积物中重金属污染及其潜在生态危害

Heavy metals pollution and their potential ecological riskin the sediment of Hailing Bay

首次分析了粤西海陵湾近岸海域表层沉积物中重金属(Cu,Pb,Zn,Cd,Hg)含量的时空分布特征,并采用海洋沉积物重金属质量国家标准和瑞典学者H knson沉积物重金属潜在生态危害系数与危害指数方法评价了该海域重金属污染程度和潜在生态危害。结果表明:该海域重金属污染和潜在生态危害较轻,其中Hg的污染和潜在生态危害较重;洪、枯季生态危害程度顺序为:Zn<Pb<Cu<Cd<Hg,枯季比洪季严重。

The characteristics of temporal and spatial distribution of heavy metals (Cu,Pb,Zn,Cd,Hg) in the surface sediment of Hailing Bay in western Guangdong Province have been analysed. National marine sediment quality for heavy metals were used to assess heavy metals pollution (degree) in Hailing Bay. The potential ecological risk (PER) factors and risk indices of heavy metals were used to assess the PER of heavy metals to marine ecosystem in water areas of Hailing bay. The result showed that the PER of heavy metals was low, and higher in dry season than in wet season, except the PER of Hg was relative higher. The heavy metals PER order is following: Zn<Pb<Cu<Cd<Hg, and its PER is (serious) in dry season than in wet season.