Assessment on heavy metal contamination degree and potential ecological risk in Lake Dianchi
The heavy metals such as As, Hg, Cr, Cd, Pb, Zn and Cu in the top 20cm sediment of 22 sampling sites in Lake Dianchi were analyzed, and Index of Geoaccumulation (Igeo) and Potential Ecological Risk Index (RT) were employed to evaluate heavy metal contamination degree and potential ecological risk comprehensively. The results indicated that Lake Dianchi was seriously contaminated by heavy metals. Every element was in the moderate contamination degree except Cr and Zn (the contamination level of Cd was as high as 4 in the strong degree), and their contamination was in the descent order of Pb > as > Cd > Cu > Hg > Cr > Zn. The average RI was 231.8 that meant in the moderate risk level. The descent order was Hg > Cd > Pb > As > Cu > Cr > Zn, and Hg and Cd were in very strong level in the northern area of Lake Dianchi. The pollution was different in space. The most obvious characteristic was that the northern area was more serious than the southern area, and the west was more serious than the east.
Sediment Lake Dianchi heavy metal contamination Indez of Geoaccumulation Potential Ecological Risk Indez
Liang Li Beihai Zhou Xiaozhen Hu Pingting Liu Xiangcan Jin
Department of Environmental Engineering, University of Science and Technology Beijing, Beijing 10008 Department of Environmental Engineering, University of Science and Technology Beijing, Beijing 10008 The State Key Laboratory of Lake Pollution Control, Chinese Research Academy of Environmental Scienc
国际会议
2009 Beijing International Environmental Technology Conference(2009北京国际环境技术会议暨第五届“中、德、波环境技术研讨会)
北京
英文
125-131
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）