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Seasonal statistical analysis of studied metals in soil profiles in the vicinity of coal based thermal power plant: a case study

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Author Affiliations

  • 1Deptt. of Chemistry, Govt. College, Kota-324001, Rajasthan, India
  • 2Deptt. of Chemistry, Govt. College, Kota-324001, Rajasthan, India
  • 3Deptt. of Chemistry, Govt. College, Kota-324001, Rajasthan, India
  • 4Deptt. of Pure & Applied Chemistry, Uni. of Kota, Kota-324005, Rajasthan, India

Res. J. Recent Sci., Volume 8, Issue (4), Pages 69-78, October,2 (2019)

Abstract

A case study was performed by assessing metal pollution within alkaline soil to evaluate their potential sources in Kota city, India. A total of 900 samples in requisite amount of soil are collected depth wise at various sampling sites in the study area during winter, rainy and summer seasons of 2011-12. Seasonal variation, in the deposition patterns of selected metals down soil profiles, controlled by meteorological parameters has been observed. Anthropogenic metal concentrations are observed to be greater in winter and less in summer. Due to washout phenomenon of upper layer of soil, the concentrations level of crustal and anthropogenic metals deposited on top soil decreases drastically in rainy season. The elevated level of metals at top soil characterized with lower pH is explained by their increased mobility which decreases on going down the soil profile due to complexation at higher pH found in clay rich bottom layer. Source apportionment by principal component analysis and positive correlations among Cu, Cd, Zn and Pb indicate their similar anthropogenic origin which is point source coal based thermal power plant mainly along with other industrial processes and traffic exhaust. However, Ca, Mg and Fe are found to have mostly crustal origin.

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