Evaluation of heavy metals pollution in water and sediments of Changdang Lake, China
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2017, Vol 11, Issue 6
Abstract
An investigation of the water and sediments of Changdang Lake China was carried out to know how seriously they are polluted from heavy metals. Water samples and sediments were collected from six sites in March, June and September 2015. The total average concentrations of heavy metals in water were measured as Mn 0.08 mg/L, Fe 72.48mg/L, Cu 0.10 mg/L, Cr 0.001 mg/L, Cd 0.0002 mg/L, Ni 0.014 mg/L, Zn 0.022 mg/L, and Hg 0.058 mg/L, while in sediments Cu 70.50 mg/Kg, Zn 255.55 mg/Kg, As 12.83 mg/Kg, Ni 42.50 mg/Kg, Cr 96.39 mg/Kg, Cd 0.02 mg/Kg, Pb 41.50 mg/Kg, Hg 0.25 mg/Kg, respectively. By applying the USEPA health risk assessment models, results indicated that the total heavy metal health risk levels in water were in the range of 2.7×10-5 -4.3×10-5a-1, with an average risk of 3.7×10-5a-1.The highest risk was found at site 6# (4.3×10-5a-1) which is inlet from the Xuebu River, while the lowest risk was found at site 2# (2.7×10-5a-1), which is located near the center of the Lake. All the risks values were below the ICRP recommended maximum acceptable level (5×10-5·a-1). The ecological risk assessment in sediments was carried out by the potential ecological risk index (PERI) proposed by Hakanson (1980). Results showed that the risk posed by heavy metals is low both in sediments and water. PCA factor loadings suggested that the sources of heavy metals in Changdang Lake sediments are from anthropogenic and lithogenic activities.
Authors and Affiliations
Javid Hussain, Ittehad Hussain, Zhenhua Zhao, Muhammad Ibrar Shinwari
Keywords
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