Removal of fluoride from water by using a coagulant (inorganic polymeric coagulant).

Environmental Science and Pollution Research International
Yogendra Singh SolankiA B Gupta

Abstract

Excess fluoride (F) ion of drinking water is a major problem in many areas of India and causes harmful effects such as dental and skeletal fluorosis. The World Health Organization (WHO 2004) recommends an upper limit of 1.5 mg/L fluoride in drinking water, and the concentration of fluoride in groundwater has been found 10-20 times higher in many of the States in India. In this study, the performance of inorganic polymeric coagulant (IPC) named as IPC-23, IPC-13, IPC-17, and alum for fluoride removal from drinking water was investigated. The amount of IPC was decided according to the Al2O3 amount present in the alum dose recommended in the batch Nalgonda defluoridation technique. The effects of coagulant dosage (IPC) at different pH and initial concentrations of fluoride on fluoride removal have been studied. The synthetic sample having a fluoride concentration of 2 to 6 mg/L was treated at the optimized dosage and residual fluoride was reduced to 1.0 to 1.2 ppm with IPC-17. Residual aluminum in treated water was well within WHO norms (< 200 μg/L) for drinking water. Optimum pH for fluoride removal was 6.5, and there was deterioration in the performance of IPC at both lower and higher pH.

References

Apr 8, 2006·Journal of Hazardous Materials· Meenakshi, R C Maheshwari
Sep 25, 2009·Journal of Environmental Management·M MohapatraP Singh
Oct 3, 2015·Advances in Colloid and Interface Science·Hongxiao TangDongsheng Wang
May 6, 2016·Materia Socio-medica·Domen KandutiBarbara Artnik

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Citations

Jul 12, 2021·Environmental Science and Pollution Research International·Jiangtao FengWei Yan

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