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J Hazard Mater. 2011 Jan 30;185(2-3):1287-94. doi: 10.1016/j.jhazmat.2010.10.044. Epub 2010 Oct 16.

Removal of fluoride from drinking water using aluminum hydroxide coated rice husk ash.

Author information

  • 1Tata Research Development and Design Centre, 54B, Hadapsar Industrial Estate, Pune 411013, India. vivek.ganvir@tcs.com

Abstract

Fluoride content in groundwater that is greater than the WHO limit of 1.5mg/L, causes dental and skeletal fluorosis. In India, several states are affected with excess fluoride in groundwater. The problem is aggravated due to the lack of appropriate and user friendly defluoridation technology. Several fluoride removal techniques are reported in the literature amongst which the Nalgonda technique and use of activated alumina have been studied extensively. However a simple, efficient and cost effective technology is not available for widespread use in many affected regions. In this paper, we present a novel cost effective defluoridation method that is based on surface modification of rice husk ash (RHA) by coating aluminum hydroxide. RHA is obtained by burning rice/paddy husk which is an abundantly available and is an inexpensive raw material. The results showed excellent fluoride removal efficiency and the adsorption capacity was found to be between 9 and 10mg/g.

Copyright © 2010 Elsevier B.V. All rights reserved.

PMID:
21074319
[PubMed - indexed for MEDLINE]
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