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Chromite Mining: Disbalancing the Aquatic Environment of Sukinda Valley

Author Affiliations

  • 1 Department of Environmental Science, Sambhu Nath College, Labpur, W.B., INDIA

Res. J. Recent Sci., Volume 4, Issue (IYSC-2015), Pages 80-93, September,2 (2015)

Abstract

The Sukinda Valley of Odisha is renowned for its widespread chromite ore deposits. Different water bodies of this area are relentlessly receiving the effluents of mining activities as well as run-off and leachate. Different physicochemical parameters of ground water, surface water and mine drainage water along with bottom sediment of Damsal Nala were analysed seasonally during the year 2010 - 11. Comparative and seasonal analysis of physicochemical parameters of its uncontaminated upstream and contaminated downstream regions was recorded in this study. Statistical interpretations were also carried out to access the level of contamination. Concentrations of heavy metals in the ground water (Cr+6: 0.00 - 0.06 mg/l; Cr+3,+6: 0.01 - 0.11 mg/l; Fe: 1.03 - 1.50 mg/l), surface water (Cr+6: 0.000 - 0.066 mg/l; Cr+3,+6: 0.01 - 0.21 mg/l; Fe:0.72 - 9.72 mg/l) and mine drainage water (Cr+6: 0.98 - 1.42 mg/l; Cr+3,+6: 49.32 - 55. 24 mg/l; Fe: 0.75 - 3.56 mg/l) were found to cross the standard value in many sites which caused severe menace to the inhabitants and aquatic organisms of this region. The bottom sediment of Damsal Nala was also found to contain high level of heavy metals like total chromium (0.29 - 31.03 g/kg) and total iron (0.63 - 89 g/kg) which may transfer to the entire food chain including human being.

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