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《Journal of China University of Mining & Technology》 2008-02
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Pollution Characteristics of Heavy Metals in Surface Sediments in Tianjin

WU Guang-hong1,2,SU Rui-xian2,LI Wan-qing3,ZHENG Hong-qi3(1.Tianjin Key Laboratory of Water Environment and Water Resource,Tianjin Normal University,Tianjin 300387,China;2.College of Urban and Environment Science,Tianjin Normal University,Tianjin 300387,China;3.Tianjin Environmental Protection Bureau,Tianjin 300191,China)  
Concentrations of cadmium,zinc,copper,nickel,lead,chromium, manganese and iron were analyzed in surface sediment samples from the Yuqiao and Tuanbowa Reservoirs,the Haihe River,the Dagu Sewage Discharge Channel and Bohai Bay in Tianjin,China.Using a potential ecological risk index(RI),a relative enrichment factor(REF) and correlation analysis,the pollution and accumulation of heavy metals in surface sediments were studied.The results show that Cd and Zn are the major pollutants and Pb,Mn and Cr are minor ones.The pollutants affected by Cif are,in decreasing order,Cd,Zn,Cu,Ni,Pb,Mn and Cr. Cd and Zn are highly enriched.The REF for Cd ranges from 12.68-43.00 and for Zn from 2.48-14.02,while the REFs for Mn and Ni are 4.There is a great divergence in the extent of contamination and ecological risk of different water bodies.The Dagu Sewage Discharge Channel and the Haihe River are highly contaminated,where the ecological risk(RI) exceeds 926.The Yuqiao and the Tuanbowa reservoirs are also highly contaminated with an ecological risk ranging from 508 to 621.Bohai Bay is moderately contaminated;its ecological risk is 240.A correlation analysis indicated that Cd,Zn,Cr and Pb pollutants are largely the result of anthropogenic activities,while Mn and Ni contamination originates from natural sources.
【Fund】: 天津市科技发展计划项目(06YFSZSF05100);; 天津师范大学博士基金项目(RL039)
【CateGory Index】: X52
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