Shahrood University of Technology Journal of Mining and Environment 2251-8592 3 2 2013 01 20 Identification of groundwater contamination sources of Lakan lead and zinc mine, Khomain, Iran 121 134 96 10.22044/jme.2013.96 EN Feridon Ghadimi Department of Mining Engineering, Arak University of Technology Mohammad Ghomi Department of Mining Engineering, Arak University of Technology Abdolmotaleb Hajati Department of Mining Engineering, Arak University of Technology Journal Article 2012 09 16 Altogether 20 groundwater samples were collected around the Lakan Pb and Zn mine in Iran. Samples were analyzed for 8 constituents including Fe, Pb, Hg, Mn, Zn, CN, SO4 and Cl using standard method. The results show that the average concentrations of constituents were 0.01, 0.60, 0.10, 0.01, 0.40, 35, 0.01 and 5.95 mg/kg for Fe, Mn, Pb, Zn, Hg, SO4, CN and Cl, respectively. The computed contamination index ranged between 2.38 and 443. It was concluded that contamination index shows a medium to high contaminated situation for Pb and Hg in groundwater around the tailings dam. Based on a multivariate analysis, four main sources of these hydrochemical data were identified. (1) Zn, Mn, TDS and SO4 have both natural and anthropogenic sources; (2) Hg constituent represents a natural source and Pb shows a anthropogenic source due to Lakan mine; (3) CN and Fe have anthropogenic source and mainly originated from the plant processing; (4) Cl represents a natural source. https://jme.shahroodut.ac.ir/article_96_6482c23034b32577ee45ff1f9fc9aed4.pdf