长寿湖水体及底泥中重金属的空间分布及污染评价

On Spatial Distribution and Evaluation of Heavy Metals in Water and Sediments at Changshou Lake

通过研究长寿湖水体及底泥重金属的质量浓度及空间分布格局,以及利用饮用水标准、地表水标准及渔业水质标准、地质积累指数评价长寿湖水质及底泥状况.结果表明:长寿湖的水质较好,仅Hg是潜在污染物质,最大值出现在人类活动较频繁的的野猫岩区域;底泥中的Cd,Pb,Cu是主要的污染物质,As和Hg也已处于轻微污染的状态;底泥中的重金属元素在空间分布中呈现出较好的一致性.相关性分析表明,水体重金属和底泥重金属元素间的关系都不密切,说明重金属没有特定的污染源.

For this study,water and sediment were sampled from Changshou Lake,consequently about 5 heavy metals were determined for spatial and quality assessment.The results showed that Hg was the potential pollutant in water,and the maximum concentrations occurred in the sites close to Yemaoyan,an area with intense human activities.While in terms of sediment,As,Hg,Cu and particularly Cd,Pb was the major pollutant.cluster and correlation analyses demonstrated heavy metal in the sediment showed strong correlations.Correlations between the elements was not obvious,explained that there is no specific pollution source of heavy metals.