Abstract
Arsenic is one of the toxic elements for human health when it is entered into the human body at a high range for a prolonged time and reported as one of the world’s extreme natural groundwater calamities. Several technologies are used towards the mitigation of arsenic from contaminated groundwater to supply arsenic-free drinking water. However, the main objective of this study is the comparison of different coagulants for efficient removal of arsenic from groundwater using oxidation followed by the chemical coagulation method, which is a conventional and useful technique of water treatment. In this experiment, naturally contaminated water samples were collected from tube wells and bleaching powder solution at different concentrations was added followed by proper mixing so that oxidation of arsenite to arsenate could be achieved. Different level of doses of coagulant such as alum, ferrous sulphate, and ferric chloride was rapidly and slowly mixed and allowed the mixture to settle for 2 h. After the filtration of supernatants, various water quality parameters had been analysed. Depending upon the dosing of oxidizing and coagulating agents the efficiency of arsenic removal varies from 57 to 89%, 61 to 95%, and 67 to 98% for alum, ferrous sulphate, and ferric chloride, respectively.
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Acknowledgements
The authors would like to thank the School of Water Resources Engineering, Jadavpur University, Kolkata-700032, India; all the previous investigators of arsenic and arsenic removal and the All India Council for Technical Education (AICTE), Government of India (GoI), and the Government of West Bengal for encouraging by giving financial support as scholarship.
Funding Information This research is financially supported by the School of Water Resources Engineering, Jadavpur University, Kolkata-700032 for experimental work, the All India Council for Technical Education (AICTE), Government of India (GoI), and the Government of West Bengal as scholarship.
Conflict of Interest The authors declare that they have no conflicts of interest or competing interests.
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Mondal, N.S., Roy, P.K., Mazumdar, A., Majumder, A. (2021). Comparative Study of Arsenic Removal Using Different Coagulants. In: Roy, P.K., Roy, M.B., Pal, S. (eds) Advances in Water Resources Management for Sustainable Use. Lecture Notes in Civil Engineering, vol 131. Springer, Singapore. https://doi.org/10.1007/978-981-33-6412-7_21
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