论文部分内容阅读
对１９８７—１９９５年期间所采集的乐安江表层沉积物中的重金属含量进行了统计分析和生态风险性评价．结果表明，德兴铜矿的矿山酸性废水和洎水河河水，使乐安江沉积物受到重金属的严重污染．沽口—香屯河段沉积物主要受到Ｃｕ严重污染，戴村受到Ｚｎ、Ｃｕ、Ｐｂ等重金属的共同污染，虎山—蔡家湾河段沉积物受到中等或轻度重金属污染．沉积物中Ｃｕ与Ｓ、Ｆｅ和水合氢氧化物有极显著的相关性，偏相关分析表明沉积物中Ｓ是控制Ｃｕ含量的主要因素．Ｐｂ主要与Ｍｎ（ｒ＝０．９４２２）和Ｆｅ（ｒ＝０．７２７１）元素呈显著相关性．Ｚｎ与Ｍｎ显示极显著相关性（ｒ＝０．８０８１）．并且，乐安江沉积物具有潜在的生态危害性．
The statistical analysis and ecological risk assessment of heavy metals in the surface sediments of the Le’an River collected during 1987-1995 were carried out. The results show that the mine acidic wastewater and the Baishui River water in Dexing Copper Mine seriously polluted the sediments of the Le’an River. The sediments in the mouth of Tuen-Xiangtun reach are mainly polluted by Cu, while Dai Village is polluted by heavy metals such as Zn, Cu and Pb. The sediments of Hushan-Caijiawan reach polluted by moderate or mild heavy metals. There is a significant correlation between Cu and S, Fe and hydrated hydroxide in sediments. Partial correlation analysis shows that S in sediments is the main factor controlling Cu content. Pb mainly showed significant correlation with Mn (r = 0.9422) and Fe (r = 0.7271). Zn and Mn showed a very significant correlation (r = 0.8081). And, the Le Anjiang sediments have potential ecological dangers.