Abstract
In this study, cow dung was identified as a neutralizing agent for red mud (RM). Present research estimated a significant reduction in pH value of red mud (10 g) from 10.28 to 8.15 and reduction in alkalinity of ~148 mg/L from ~488 mg/L by adding 80 g of cow dung in 40 days of anaerobic condition. XRD results exhibit a high intensity of quartz and found new compound, the calcium carbide. The acid neutralizing capacity (ANC) of NRM reduces to ~0.87 from ~1.506 mol H+/kg. Based on the resultant research, present study proposes cow dung as an efficient neutralizing agent for reducing the pH and alkalinity in the red mud.
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Acknowledgements
The authors are thankful to Nalco Damanjodi, Koraput, Odisha, India, for providing sample for the research work. The author also is thankful to Director, NIT, Rourkela, for providing research facilities.
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Patel, S., Pal, B.K. & Patel, R.K. A novel approach in red mud neutralization using cow dung. Environ Sci Pollut Res 25, 12841–12848 (2018). https://doi.org/10.1007/s11356-018-1374-y
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DOI: https://doi.org/10.1007/s11356-018-1374-y