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Distribution of heavy metals and associated human health risk in mine, agricultural and roadside soils at the largest chromite mine of India. | LitMetric
This study accessed the levels of Cd, Cr, Fe, Mn, Ni, Pb and Zn concentration in soils of different locations (mine, roadside, agricultural and control sites) of Sukinda chromite mine (the India's largest Chromite mine and listed among the world's ten most polluted regions). Geo-accumulation (I) index indicates that the mine, agricultural and roadside soils are 'heavily to extremely contaminated' due to Cr, Ni, Pb and Cd, hence human residing/working in this region can have health hazards due to contaminated soil via different exposure pathways. The concentration of heavy metals (mg/kg) in mine site vary between 52.35 and 244.8 (Cr), 12,030.2 and 31,818.6 (Cr), 5460.4 and 8866.0 (Ni), 70.02 and 208.6 (Pb), 0.95 and 5.3 (Cd), 209.1 and 360.4 (Mn), 21,531.8 and 28,847 (Fe) and 221 and 349.3 (Zn). Fe, Cr, Cr and Ni concentration in soil follows an order of mine site > road sites > agricultural lands > control forest sites. Principal component analysis and hierarchical cluster analysis indicate Cd, Cr, Fe, Ni and Pb as major pollutants in the region. Cancer Risk is 'high' in both adult (5.38E-04) and children (4.45E-04) in mining sites and 'low' to 'very low' in agricultural and road side soils. The hazard index for all the heavy metals in a mining areas is varied from 2.9 to 5.2 in adult and 2.8-5.1 in children, indicating 'high' to 'very high' non-cancer risk due to significant contribution of Ni, Pb and Cr concentration (73, 11 and 10%, respectively).
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