Assessment and occurrence of various heavy metals in surface water of Ganga river around Kolkata: a study for toxicity and ecological impact

被引:113
作者
Aktar, Md. Wasim [1 ]
Paramasivam, M. [1 ]
Ganguly, M. [2 ]
Purkait, S. [2 ]
Sengupta, Daipayan [2 ]
机构
[1] Bidhan Chandra Krishi Viswavidyalaya, Dept Agr Chem, Nadia 741252, WB, India
[2] Univ Calcutta, Inst Agr Sci, Dept Agr Chem & Soil Sci, Kolkata 700019, India
关键词
Heavy metals; Physico-chemical constituents; Ganga water; Contamination; West Bengal; TRACE-METALS; QUALITY; SPECIATION; ZIMBABWE; INDEX; LEAD;
D O I
10.1007/s10661-008-0688-5
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A study was conducted during November, 2005-October, 2006 to evaluate the surface water quality of river Ganga around Kolkata. The samples were analyzed for a number of physico-chemical parameters using standard laboratory procedures and giving prime thrust to determine the heavy metal concentrations (Fe, Mn, Cu, Zn, Pb, Cd, Cr, and Ni) of surface water at four different locations of the river Ganga around Kolkata from two points (middle of the river stream and a discharge point) at each location. Out of 96 samples analyzed, Fe, Mn, Cu, Zn, and Ni were detected in 71, 47, 38, 60, and 45 samples in the concentrations ranging from 0.013 to 5.49, 0.022 to 1.78, 0.003 to 0.033, 0.005 to 0.293, and 0.045 to 0.24 mg L (-aEuro parts per thousand 1), respectively. Cd and Pb were detected in six and 21 samples in the range of 0.005 to 0.006 and 0.05 to 0.53 mg L (-aEuro parts per thousand 1), respectively. But Cr was not detected in any of the samples analyzed. The metals exhibited no significant variation with respect to sampling locations as well as discharge points. However, the concentration of those metals varied with season, being higher in rainy and lower in winter season.
引用
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页码:207 / 213
页数:7
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