IJEP 41(9): 1013-1018 : Vol. 41 Issue. 9 (September 2021)
1. Tamil Nadu Pollution Control Board, Arumbakkam, Chennai – 600 106, Tamil Nadu, India
2. Presidency College (Autonomous), Post Graduate and Research Department of Chemistry, Chennai, Tamil Nadu, India
The unscientific disposal of chromium ore processing residue (COPR) in Ranipet area, contaminate the groundwater in the vicinity. Due to the continuous leaching of Cr(VI) from the COPR, the removal of chromium from the groundwater alone is a challenging task. Though several works of literature have confirmed the presence of Cr(VI) in the vicinity, none of them has reported a technology for the removal of Cr(VI) from the contaminated groundwater in this site. This report highlights a recorded value of Cr(VI) as 2018 mg/L in the groundwater and soil contamination in the range of 18-26.2 mg/g within the site. The analysis of water samples collected within 3.0 km from downstream of the dumpsite has revealed the presence of Cr(VI) in the range of 0.053 to 2018 mg/L. Experiments have shown the result of 100% removal of Cr(VI) upon the usage of SnCl2 and Na2S2O5 from the groundwater containing 2000 mg/L of Cr(VI). The report suggests that no acid was required for the reduction of Cr(VI) on the usage of tin chloride and the dosage required for complete removal of Cr(VI) is compared with sodium metabisulphite. As the rate of removal of Cr(VI) is faster in the chemical treatment, the reduction and precipitation method is recommended for treating the contaminated groundwater at this site.
COPR, Cr(VI) treatment, SnCl2, Na2S2O5, reduction and precipitation, sludge disposal
- Pazand, A. and A. Hezarkhani. 2012. Investigation of hydrochemical characteristics of groundwater in the Bukan basin, northwest of Iran. Appl. Water Sci., 309-315.
- Konikow, L. and E. Kendy. 2005. Groundwater depletion : A global problem. Hydrogeol. J., 13:317-320.
- CPCB. 2017. List of hazardous waste contaminated dumpsites in the country (as per the information received from SPCBs). Central Pollution Control Board, New Delhi.
- Kanchinadham, B. K., V. D. Lognathan and C. Kalyanaraman. 2012. A preliminery study on leachability of chromium from a contaminated site. Env. Progress Sustainable Energy. 32(4):1096-1100.
- Sankaran, S., et al. 2010. Geophysical and tracer studies to detect sub-surface chromium contamination and suitable site for waste disposal in Ranipet, Vellore district, Tamil Nadu, India. Env. Earth Sci., 60:757.
- Ambiga, K. and R. Annadurai. 2015. Development of water quality index and regression model for assessment of groundwater quality. Int. J. Adv. Remote Sensing GIS. 4:931-943.
- Pranavan, T.S.D., et al. 2011. Groundwater pollution in the Palar river bed near Vellore, Tamil Nadu, India. J. Sci. Tech., 4(1):19-21.
- Loganathan, M. and N. J. Narendiran. 2014. Pollution of soil due to leather factory near Ranipet, Tamil Nadu, India. Int. J. Eng. Trends Sci. Tech., 2:86-90.
- Divya, K. and R. Vidya. 2016. A review on tannery pollution in Vellore district, Tamil Nadu. Indian Res. J. Pharmaceutical Biol. Chem. Sci., 7(3):1380-3184.
- Ahamed, K.R., S. Manikandan and V.C.A. Malini. 2017. Impact of heavy metals on groundwater pollution in some towns of Vellore district, Tamil Nadu, India. Int. J. Sci. Eng. Tech. Res., 6(8):1210-1218.
- Shymala, R. and E. Hemavathy. 2018. Assessment of groundwater quality in Vellore district, Tamil Nadu, India. Int. J. Interdisciplinary Res. Innovations. 6(2):6-24.
- Sujatha, D., et al. 2017. Heavy metal contamination in water, soil and vegetables of tanneries polluted area of Vaniyambadi, Tamil Nadu, India. Int. J. Geol. Earth Env. Sci., 7(2):1-10.
- Murugaiyan, V., S. Selvaraj and P. K. Selvaraj. 2019. A comparative study on conversion of soluble Cr(VI) into insoluble Cr(VI) and reduction of Cr(VI) in contaminated groundwater at COPR dumpsite. Asian J. Chem., 31:533-537.
- APHA, AWWA, WPCF. Standard methods for examination of water and wastewater (20th edn). American Public Health Association, American Water Works Association and Water Pollution Control Federation.
- U.S. EPA. 1992. Toxicity characteristic leaching procedure. Method 1311. U.S. Environmental Protection Agency, Washington D.C.
- Buerge, I. J. and S.J. Hug. 1997. Kinetics and pH dependence of chromium (III) reduction by iron (II). Env. Sci. Tech., 31:1426-1432.
- Du, Y. and M. Chrysochoou. 2018. Chemistry and leaching behaviour of chromite ore processing residue from the soda ash process. Env. Eng. Sci., 35(11).
- IS 10500. 2012. Drinking water – specification (2nd revision). Bureau of Indian Standards, New delhi.
- Eary, L.E. and D. Rai. 1988. Chromate removal from aqueous wastes by reduction with ferrous ion. Env. Sci. Tech., 22(8):972-977.
- Katz, S.A. 1991. The analytical biochemistry of chromium. Env. Health Perspectives. 92:13-16.
- Fantoni, D., et al. 2002. Natural hexavalent chromium in groundwater interacting with ophiolitic rocks. Env. Geol., 42:871-882.
- Rao, G.T., et al. 2011. Assessment of groundwater contamination from a hazardous dumpsite in Ranipet, Tamil Nadu, India. Hydrogeol. J., 19:1587-1598.
- Murugaiyan, V., T. Sehar and S. Selvaraj. 2018. Complete reduction of hazardous Cr(VI) in chromium ore processing residues dumpsite. Asian J. Chem., 30:620-624.
- Murugaiyan, V., S. Selvaraj and K. Selvaraj. 2018. Experimental validation on the treatment of contami-nated groundwater at COPR dump site. Int. J. Appl. Eng. Res., 7:5265-5270.
- Sehr, T., V. Murugaiyan and S. Selvaraj. 2016. Solidification and stabilization of chromium bearing waste. Indian J. Sci. Tech., 9(20):1-4.