International Journal of Environmental Sciences

Volume 6 Issue 1 2015- July 2015  Pages: 114- 124 <<Previous    Next>>

Chromium contamination in soil and groundwater due to tannery wastes disposals at Vellore district of Tamil Nadu

Author Information:

Sunitha Rangasamy1, Gayathri Purushothaman2, Bharani Alagirisamy1 and Mahimairaja Santiago1
1- Department of Environmental Science, Agriculture College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India.
2- Department of Biotechnology, Indian Institute of Technology, Karagpur, West Bengal, India.

ABSTRACT

Survey has shown the existence of hundred of ‘Hot-spots” of Cr contaminated agricultural lands in Vellore district where clusters of tanneries are located. The indiscriminate disposal of tannery wastes had resulted in the widespread contamination of soil and waters. It is found that most (>90%) of the soil samples from 65 locations in Vellore district had high concentration of Cr (>200 mg kg-1) which exceeds the maximum permissible limit prescribed by many Environmental Protection Agencies. Further, traces (below detectable level) to high (36.7 mg L-1) concentration of Cr were recorded in the ground waters. The Cr contaminated soil and water have also shown greater hazards due to sodium and other salts (salinity), besides Cr. The BOD and COD of the groundwater were not beyond the permissible limit. Most of the Cr contaminated water exhibited greater risk in terms of both salinity and sodicity hazards and were found unsuitable for both human consumption and irrigation purpose. The present study deals the chromium concentration in water and agricultural soil which was compared with previous year data. The soil chromium concentration was decreased at the same time water chromium was increased due to leaching process. The chromium was leached from upper layer of soil to deeper layer of aquifer

Keywords: Chromium contamination, Vellore district, Soil pollution.

DOI:10.6088/ijes.6013

© 2015 Copyright by the authors, licensee Integrated Publishing Association.This is an open access article distributed under the Creative Commons Attribution License (3.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

The electronic version of the article can be downloaded below

Download full text pdf

SocialTwist Tell-a-Friend