Table of Contents
Advances in Environmental Chemistry
Volume 2014, Article ID 483609, 9 pages
Research Article

Defluoridation with Locally Produced Thai Bone Char

1Department of Civil Engineering, Thammasat University, Pathum Thani 12120, Thailand
2Dental Health Division, Department of Health, Ministry of Public Health, Nonthaburi 11000, Thailand
3Department of Civil Engineering, Colorado State University, Fort Collins, CO 80523, USA

Received 27 June 2014; Accepted 3 August 2014; Published 19 August 2014

Academic Editor: Jesus Simal-Gandara

Copyright © 2014 Yothin Mutchimadilok et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The fluoride sorption ability of a locally available bone char is quantified. Both a synthetic solution and natural groundwater samples from several sites are studied and compared to Indian bone char, which is widely accepted and used successfully in India and elsewhere. The Freundlich and Langmuir sorption isotherms were used to quantify sorption properties. Results show that the Thai bone char is as effective as the Indian bone char for removing fluoride from contaminated water, despite the more rigid physical and social constraints found in rural Thailand. Sorption studies with fluoride-contaminated natural groundwater samples also show that chlorides, nitrates, and sulfates had little effect on the removal of fluoride by the homemade bone char.