Heavy Metal Contamination and Potential Ecological Risk Assessment of sediments in Yangzonghai Lake
The contents and characteristics often heavy metals in surface sediments from Yangzonghai Lake in Yunnan, China were analyzed. Ecological risk index presented by Hakanson to assess the potential ecological risk of Yangzonghai Lake was utilized. The results showed that the average concentrations of titanium(Ti), manganese(Mn), zinc(Zn), vanadium(V), chromium(Cr), copper(Cu), nickel(Ni), cobalt(Co), lead(Pb) and arsenic(As) in surface sediments of Yangzonghai Lake were up to 9413.1, 617.9, 149.2, 189.6, 145.8, 97.6,55.1, 27.4, 40.3 and 31.4mg/kg, respectively, which are higher than their natural background values. Pearsons correlation analysis indicated that Zn, Cr, Pb and As were highly correlated, and the similar distributions in sediment indicated that they might originate from activities. Ti, Mn, V, Cu, Ni, and Co were also well correlated, and the distributions indicated that they were mainly from natural factors. The evaluation of pollution index revealed a clear accumulation of the 10 heavy metals, all reaching the level of moderate pollution. As,Cu and Cr were the most important environmental contaminants in Yangzonghai Lake. As a whole, heavy metals reached the level of low ecological risks, and in some parts, they reached the moderate level. Heavy metals in Yangzonghai Lake in the descending order of their ecological risks were As, Cu, Co, Ni, Pb, Cr, V, Zn, Mn and Ti. As was more prominent than other heavy metals in terms of the ecological risk and thus the most important factor of potential ecological risk in surface sediment of Yangzonghai Lake.
Yangzonghai Lake sediments heavy metal contamination ecological risk
Yuxi Zhang Jichao Sun Jingtao Liu Guanxing Huang Xiaoping Xiang Xi Chen Jihong Jing Haiwei Cui
The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences Shijiazhuang, China
国际会议
2010 International Conference on Digital Manufacturing and Automation(2010 数字制造与自动化国际会议 ICDMA 2010)
长沙
英文
794-800
2010-12-18（万方平台首次上网日期，不代表论文的发表时间）