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中文摘要：
对桑沟湾表层沉积物重金属（Cu，Zn，Pb，Cd，Hg，As）的含量分布及富集状况进行了调查分析，并采用Hakanson的潜在生态危害指数法评价了该湾沉积物中重金属的污染程度和潜在生态危害。结果表明：桑沟湾表层沉积物中Cu、Zn、Pb、Hg含量分布特征表现为从西南向的湾底向东北向的湾外逐渐减少的趋势；Cd在湾中部含量最低，并向四周呈辐射状增高的趋势；As表现为从湾外向湾内递增的趋势；6种重金属中，以Cd的污染程度最大，平均污染系数为0．81，其余元素的富集均较低，重金属污染程度由高到低依次为Cd、Zn、Pb、Cu、As、Hg。潜在生态危害评价结果表明，桑沟湾表层沉积物中重金属的潜在生态危害轻微；污染程度顺序为Cd〉As〉Hg〉Pb〉Cu〉Zn，对桑沟湾生态环境具有潜在影响的重金属元素主要是Cd。
英文摘要：
This paper dealt with the distribution and enrichment of heavy metals in surface sediments of Sungo Bay. Simultaneously, the method of potential ecological risk index presented by Lars Hakanson was used to assess their ecological risk. The results showed that the contents of Cu, Zn, Pb and Hg gradually decreased from southwest to northeast, while As was just the opposite, Cd appeared lowest in the middle of the Bay and radiantly increased around. Among all these heavy metals, the pollution of Cd was most serious with the pollution index 0.81. The pollution degree of these heavy metals in surface sediments followed the order： Cd〉Zn〉Pb〉Cu〉As〉Hg. The potential ecological risk of the heavy metals in this area belonged to light. The pollution degree of these heavy metals in surface sediments of Sungo Bay was Cd〉 As〉Hg〉Pb〉Cu〉Zn. Cd was the potential impact element for the ecological environment of Sungo Bay.
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