作　　者： ; ; ; ; ; ; ; (吕业坚）;

机构地区： 广西大学动物科学技术学院

出　　处： 《水生态学杂志》 2013年第5期54-59,共6页

摘　　要： 2012年5—10月对武鸣县混养鱼塘水体及表层沉积物中Cu、Zn含量进行测定，检测了水体理化指标，分析重金属的分布特征，采用地累积指数法和潜在生态风险指数法对其进行评价。结果表明，水体中重金属含量较低，Cu、Zn的浓度变化范围分别为12．33—78．11和22．99～95．78μg/L，均达到国家Ⅱ类水质标准（GB3838—2002）；沉积物中Cu、Zn的含量均远高于水中的含量，且超出相应的土壤背景值，其最大含量分别为背景值的6．4、8．6倍；地积累指数（Igen）为2、3，为中度污染；潜在生态风险系数（Er^i〈40）和潜在生态风险指数（RI〈150）评价均为轻微生态危害。 The distribution characteristics of heavy metals were discussed based on the water quality analysis and the Cu, Zn content of water and surficial sediments in the polycuhure fish ponds of the Wuming County, during May to October in 2012, and the pollution degree and potential ecological risk of heavy metals in sediments were as- sessed with both the index of geoaccumulation and potential ecological risk index. The results showed that the con- tent of heavy metals in water was relatively low than the national water standards of class V （ GB3838-2002 ）, the concentration ranges of Cu and Zn were 12.33 -78.11 μg/L and 22, 99 -95.78 μg/L, while the Cu and Zn con- tent in sediments was relatively high, and the average levels exceeded the related soil background values, that was the maximum content values were 6.4 times and 8.6 times as much as the local background, respectively. The pol- lution extent of Cu and Zn in sediments by index of geoaccumulation （Igeo） were between class 2 to 3 （moderately to heavily polluted）, and the potential ecological risk were slight according to the assessments from both the poten- tial ecological risk factors （Er^i 〈40） and the potential ecological risk indexes （RI 〈 150）.

关 键 词： 混养鱼塘 重金属 表层沉积物 地积累指数 潜在生态风险

领　　域： [环境科学与工程]