Removal of Fluoride from Aqueous Solution by Using Ca-Bentonite and H-Bentonite

Abstract:

Removal of fluoride from aqueous solution by using Ca-bentonite and H-bentonite (acid-treated bentonite) was studied by batch equilibrium method. The fluoride sorption capacity of Ca-bentonite increases with the fluoride concentration increase or the pH-value decrease. H-bentonite has better affinity to fluoride than Ca-bentonite. H-bentonite can be used effectively for fluoride removal as a low cost adsorbent. The adsorption type of H-bentonite is ion exchange and the adsorption type of Ca-bentonite can be explained by ion exchange and physical adsorption.

• Periodical: Advanced Materials Research (Volumes 391-392)
• Pages: 1417-1422
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.391-392.1417
• Online since: December 2011
• Authors: Yu Xin Ma, Feng Mei Shi, Miao Nan Wu
• Keywords: Adsorption Mechanism, Bentonite, Defluoridation, Dubinin-Rasdushkevich Equation

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