中文摘要：

汞由于其在环境中的持久性、生物地球化学可循环性以及潜在的生态威胁性而受到格外关注。对武汉远郊、城乡结合部和市区三种环境中6个湖泊的水、沉积物和生物（鱼）中汞污染特征进行了调查采样，用原子荧光光谱仪进行了汞含量的测定。采用Hakanson提出的潜在生态危害指数法直接评价了武汉湖泊汞的生态效应。结果表明，与国家食品卫生标准鱼肉中汞含量（≤300ng／g）相比，除梁子湖乌鱼（汞含量为676ng／g）外，6个湖泊3种鱼肉中汞含量均未超标，表明武汉城市湖泊汞元素尚未造成明显的生态效应；与国家Ⅲ类水质汞含量标准（0．1μg／L）相比，除金银湖水汞含量（0．137μg／L）略有超标外，其他湖水汞含量分布在0．048—0．081μg／L之间，均在合格标准线以下，武汉地区湖水中重金属汞污染不严重，不会构成严重的环境问题；应用Hakanson评价模型，据单个金属的潜在生态危害系数，排出所研究湖泊沉积物汞污染程度的序列为：东湖〉墨水湖〉金银湖〉梁子湖〉汤逊湖〉鲁湖。

英文摘要：

Mercury pollution has been one of the major environmental issues, drawing much scientific and public attention due to their bioaccumulation potential, persistence, toxicity and geochemistry circle. The samples of water, sediments and fish, were collected from Lake East, Lake Moshui, Lake Tangxun, Lake Lu, Lake Jinyin and Lake Liangzi, which are located in urban, suburban and exurb lakes of Wuhan, separately. Total concentrate of mercury in water, sediments and fish muscle was determined utilizing Cold Vapor-Atomic Absorption Spectrophotometer. The I＇takanson＇s method of potential ecological risk factors was applied and the ecological effect of mercury contamination in urban lakes was assessed directly. The results show that, first, the concentrations of mercury in 3 kinds of fish meet with the requirements of the national food hygiene testing standard （Hg≤300 ng/g）, except snakehead from Lake Liangzi （Hg 676 ng/g）. The mercury in Wuhan urban lakes has not caused adverse ecological effect. Second, the concentration of mercury in water from Lake Jinyin （Hg 0. 137 μg/L） exceeds the third level of national water standard （Hg 0.1 μg//L）, but that from other lakes （Hg 0. 048 -0. 081μg//L） is under the acceptable standard. Therefore, mercury pollution in Wuhan urban lake water is not serious and will not produce serious environmental problem. Third, application of Hakanson＇s model taking mercury as the factor, the sequence of the ecological risk level of sediment from the studied lakes is Lake East 〉 Lake Moshui 〉 Lake Jinyin 〉 Lake Liangzi 〉 Lake Tangxun 〉 Lake Lu.