对广西廉州湾表层沉积物进行了采集,并测定了其重金属的含量.对重金属的含量和分布进行了对比分析,并采用单因子指数法和Hakanson的潜在生态风险指数法对其重金属的污染特征及潜在生态风险性进行了评价.结果表明,廉州湾海域表层沉积物5种重金属的平均含量均低于国家海洋沉积物一类标准,南部的重金属含量较高；总体污染程度为中等污染,各重金属污染程度由高到低依次为Cd＞Cu＞Pb＞Zn＞Hg;该海域沉积物重金属总体潜在生态风险程度低,各重金属元素的潜在生态风险程度由高到低依次为Cd＞Hg＞Cu＞Pb＞Zn,其中Cd为主要潜在生态风险因子.%The surface sediments of Lianzhou Bay were sampled and the heavy metal contamination was monitored. Distribution and contents of the heavy metals were comparatively analyzed, and the pollution and ecological risk assessment of heavy metals in the surface sediments was investigated by applying the single factor index and Hakanson potential ecological risk index. The results showed that the average contents of heavy metals Cu, Zn, Pb, Cd, Hg were lower than the first level of heavy metals in marine sediment regulated in the GB 18668-2002 and the contents were relatively higher in the southern region of Lianzhou Bay. The overall contamination level of heavy metals in the surface sediments of Lianzhou Bay was intermediate, and the pollution levels of heavy metals followed the order; Cd > Cu > Pb > Zn > Hg. The overall level of potential ecological risk of heavy metals in the sediments was low, while the single potential ecological risk of heavy metals followed the order; Cd > Hg > Cu > Pb > Zn. Cd was the key factor of potential ecologicalrnrisk.
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