【作者】 杨曦； 王中良； 朱青青；

【Author】 YANG Xi 1 , WANG Zhong-liang 1,2* , ZHU Qing-qing 1 (1.Tianjin Key Laboratory of Water Environment and Resources, Tianjin Normal University, Tianjin 300387, China; 2. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China)

【机构】 天津师范大学天津市水资源与水环境重点实验室； 中国科学院地球化学研究所环境地球化学国家重点实验室；

【摘要】 为了了解天津蓟运河中重金属Cd,Zn,Cu,Pb,Cr,Mn和Fe在溶解态、颗粒态及表层沉积物中的污染水平、富集规律、可能来源及分布形态,采用潜在生态风险指数ifC和聚类分析等方法,利用ICP-MS测定样品,得到以下结论:1.蓟运河水中的重金属含量均属于劣五类水质,但毒理效应较小,河水有一定的净化能力。2.蓟运河中农业及生活污水造成的重金属污染对颗粒态中的重金属含量影响很大,而沉积物中的重金属污染既有来自农业和生活污水也有工业污水。3.颗粒态中的重金属污染程度最大的是Mn,属于高度污染;而在表层沉积物中污染程度最大的是Pb,Mn为低度污染,推测Mn的污染易于存在于颗粒态中;其他Cr、Zn和Cd无论是颗粒态还是沉积物中都属于中度污染,污染程度相近。4.表层沉积物中可提取态富集的重金属Cr、Zn、Pb和Cu受人类活动影响较大,其活性和迁移性强弱也跟人类活动有关。更多还原

【Abstract】 Cd, Zn, Cu, Pb, Cr, Mn and Fe have been measured by ICP-MS in dissolved phases, suspended particles and surface sediments of Jiyun River in Tianjin, China. Contaminant factor i f C and cluster analysis were used to determine their pollution levels, accumulation, sources and distribution patterns. The results are as following: 1. The concentrations of heavy metals in Jiyun River are all higher than the water quality standard values of grade Ⅴ, but the eco-toxicological effect is negligible, and the river has certain purified ability. 2. The agricultural and domestic sewage plays a important role in the heavy metal contents for suspended particles, and in surface sediments the heavy metal pollutions are from both agricultural and life sewage and industrial sewage. 3. Mn in particles has the high pollution level, belonging to the heavy pollution, but in the surface sediments Pb pollution is high, Mn for light pollution, the fact indicates that Mn pollution easily occurs in suspended particles; and Cr, Zn and Cd have the similar pollution level, belonging to the moderate pollution in suspended particles and sediments. 4. The extractable heavy metals Cr, Zn, Pb and Cu in surface sediments are significantly influenced by human activity, also human activity has an effect on the activity and mobility of these heavy metals.更多还原