【作者】 魏荣菲； 庄舜尧； 杨浩； 戎静； 王小雷；

【Author】 WEI Rong-fei~1,ZHUANG Shun-yao~2,YANG Hao~1,RONG Jing~1,WANG Xiaolei~1 (1 School of Geography Science,Nanjing Normal University,Jiangsu Nanjing 210046,China;2 Stake Key Lab of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Jiangsu Nanjing 210008,China)

【机构】 南京师范大学地理科学学院； 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室；

【摘要】 分析测定了苏州河网区河道底泥十个剖面样点60个样品中Cu、Pb、Zn、Cr、Al、Fe、K、Mn、有机质、TP、TN、粒度、pH及含水量,采用地累积指数、生态风险指数和相关分析等方法研究其重金属污染特征。结果表明:Cu和Zn处于中或中-强度污染,Pb处于无-中污染,没有Cr污染;垂直分布特征显示:Cu和Zn污染逐年变化较为一致,Pb污染有逐年加重趋势;重金属潜在生态风险处于轻微污染状态;相关性分析显示,粒度分级对重金属分布影响较小,而有机质是影响其分布的重要因素之一,Mn、Cr、Cu、Zn、Pb五种重金属相关性显著。更多还原

【Abstract】 Metals(Cu,Pb,Zn,Cr,Al,Fe,K,Mn),organic matter(OM),total phosphorus(TP),total nitrogen(TN),grain size,pH and water content were analyzed and determined in sediment of sixty samples collected from ten selected sites at the typical river crossed region of Suzhou City.The geo-accumulation index, potential ecological risk index and correlation analysis were employed to study the distribution and pollution pattern of heavy metals.The result showed that a moderate and moderate to strong contamination of Cu and Zn, little contamination to moderate contamination of Pb,no contamination of Cr in the river sediment.The results also showed that the variation of Cu and Zn with depth was consistent in the vertical distribution.The pollution of Pb decreased annually in the sediment deposition.Heavy metal pollution in this area was in a low potential ecological risk.The correlation analysis suggested that the grain size had not influence on the distribution of heavy metals expect for organic matter(OM),however,Mn,Cr,Cu,Zn and Pb were positively correlated to each other.更多还原