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Vol. 26 No. 11 (2014): Vol 26 Issue 11

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Heavy Metal Ecological Risk in Bottom Sludges of Yangzong Lake, China

https://doi.org/10.14233/ajchem.2014.17518
Y.X. Zhang
The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciencesy, Shijiazhuang 050061, P.R. China *Corresponding author: Tel/Fax: +86 311 67598559; E-mail: kobzhang@qq.com
J.J. Liu
The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciencesy, Shijiazhuang 050061, P.R. China
X. Chen
The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciencesy, Shijiazhuang 050061, P.R. China
J.T. Liu
The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciencesy, Shijiazhuang 050061, P.R. China
J.C. Sun
The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciencesy, Shijiazhuang 050061, P.R. China

Corresponding Author(s) : J.J. Liu

kobzhang@qq.com

Asian Journal of Chemistry, Vol. 26 No. 11 (2014): Vol 26 Issue 11

Abstract

The concentrations of 10 heavy metals in bottom sludges of Yangzong lake in Yunnan, China were analyzed. Ecological risk index presented by Håkanson to assess the potential ecological risk of Yangzong lake was utilized. The results showed that the mean concentrations of titanium, manganese, zinc, vanadium, chromium, copper, nickel, cobalt, lead and arsenic in surface bottom sludges were up to 9413.1, 617.9, 149.2, 189.6, 145.8, 97.6, 55.1, 27.4, 40.3 and 31.4 mg/kg, respectively, which are higher than their natural background values. Pearson’s correlation analysis indicated that zinc, chromium, lead and arsenic were highly correlated and they were originate from activities. Titanium, manganese, vanadium, copper, nickel and cobalt were also well correlated and 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. Enrichment of arsenic, copper and chromium was more prominent then other heavy metals. Heavy metals in Yangzong lake in the descending order of their ecological risks were arsenic, copper, cobalt, nickel, lead, chromium, vanadium, zinc, manganese and titanium. Among them, arsenic was the most prominent factor of ecological risk in bottom sludges of Yangzong lake.

Keywords

Heavy metal Ecological risk Bottom sludge Yangzong lake
Zhang, Y., Liu, J., Chen, X., Liu, J., & Sun, J. (2014). Heavy Metal Ecological Risk in Bottom Sludges of Yangzong Lake, China. Asian Journal of Chemistry, 26(11), 3325–3330. https://doi.org/10.14233/ajchem.2014.17518
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