Abstract
The concentrations of heavy metals (As, Ba, Co, Cr, Cu, Ni, Mo, Pb, Sr, V and Zn) were studied in soils to understand metal contamination due to industrialization and urbanization around Manali industrial area in Chennai, Southern India. This area is affected by the industrial activity and saturated by industries like petrochemicals, refineries, and fertilizers generating hazardous wastes. The contamination of the soils was assessed on the basis of geoaccumulation index, enrichment factor (EF), contamination factor and degree of contamination. Soil samples were collected from the industrial area of Manali from the top 10-cm-layer of the soil. Soil samples were analyzed for heavy metals by using Philips MagiX PRO-2440 Wavelength dispersive X-ray fluorescence spectrometry. The data revealed elevated concentrations of Chromium (149.8–418.0 mg/kg), Copper (22.4–372.0 mg/kg), Nickel (11.8–78.8 mg/kg), Zinc (63.5–213.6 mg/kg) and Molybdenum (2.3–15.3 mg/kg). The concentrations of other elements were similar to the levels in the earth’s crust or pointed to metal depletion in the soil (EF < 1). The high-EFs for some heavy metals obtained in the soil samples show that there is a considerable heavy metal pollution, which could be correlated with the industries in the area. Contamination sites pose significant environmental hazards for terrestrial and aquatic ecosystems. They are important sources of pollution and may result in ecotoxicological effects on terrestrial, groundwater and aquatic ecosystems. In this perspective there is need for a safe dumping of waste disposal in order to minimize environmental pollution.
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Acknowledgments
The authors are thankful to Dr. V. P. Dimri, Director, National Geophysical Research Institute, Hyderabad, for his support and permission to publish this paper. Thanks are due to Mr. B. V. Ramana for assisting in sampling during fieldwork. Thanks are also due to the Ministry of Environment and Forests, Government of India, New Delhi, for partially funding this work.
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Krishna, A.K., Govil, P.K. Assessment of heavy metal contamination in soils around Manali industrial area, Chennai, Southern India. Environ Geol 54, 1465–1472 (2008). https://doi.org/10.1007/s00254-007-0927-z
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DOI: https://doi.org/10.1007/s00254-007-0927-z