Abstract:Heavy metals such as As, Hg, Cr, Cd, Pb, Zn and Cu in the 20cm sediment core of 22 sampling sites in the outer area of Lake Dianchi were analyzed. The results evaluated using sediment quality guidelines (SQGs) , showed that the highest content of Pb was 319mg/kg, which seriously exceeded the guidelines values, and 9 sampling sites exceeded ERM/PEL values. The degree of contamination in descending order was Pb>Cu>Hg>As>Cd>Cr>Zn, the content of Pb, As and Cu was still high in the 15~20cm sediment core, and the depth of contamination of the others was generally as deep as 10~15cm.In potential ecological risk index (RI), suggested that Lake Dianchi hasmid level of ecological risk, whereas the north area has high level, and the order of descent was Hg>Cd>Pb>As>Cu>Cr>Zn. The two evaluation approaches should be applied together to overcome the diversity problem. The contamination degree and potential ecological risk were spatially different; most obviously the condition in the north area was more serious than the south and the content in the west was higher than the east.
李梁, 胡小贞, 刘娉婷, 周北海, 金相灿. 滇池外海底泥重金属污染分布特征及风险评价[J]. 中国环境科学, 2010, 30(增刊): 46-51.
LI Liang, HU Xiao-Zhen, LIU Ping-Ting, ZHOU Bei-Hai, JIN Xiang-Can. Heavy metals distribution characteristics and potential ecological risk evaluation in the sediment of outer area of Lake Dianchi. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(增刊): 46-51.