Bone char as a green sorbent for removing health threatening fluoride from drinking water

Alkurdi, Susan S. A. and Al-Juboori, Raed A. and Bundschuh, Jochen and Hamawand, Ihsan (2019) Bone char as a green sorbent for removing health threatening fluoride from drinking water. Environment International, 127. pp. 704-719. ISSN 0160-4120

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Abstract

Millions of people around the world suffer from or prone to health problems caused by high concentration of fluoride in drinking water sources. One of the environmentally friendly and cost-effective ways for removing fluoride is the use of bone char. In this review, the structural properties and binding affinity of fluoride ions from different water sources was critically discussed. The effect of experimental conditions on enhancing the adsorption capacity of fluoride ions using bone char samples was addressed. It appears that surface properties, and conditions of the bone char production such as temperature and residence time play an important role in designing the optimal fluoride removal process. The optimum temperature for fluoride removal seems to be in the range of 500–700 °C and a residence time of 2 h. Applying various equilibrium adsorption isotherms for understanding fluoride adsorption mechanism was presented. The effect of bone char modification with different elements were discussed and recommendations for a further increase in the removal efficiency was proposed. Cost of bone char production and large-scale treatment systems were also discussed based on information available from scientific and commercial sources. Challenges with existing domestic defluoridation designs were highlighted and suggestions for new conceptual designs were provided.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Date Deposited: 12 Feb 2020 06:15
Last Modified: 13 Feb 2020 00:23
Uncontrolled Keywords: fluoride removal by bone char, surface modification, sorption capacity, mechanism of fluoride removal, cost conceptual designs
Fields of Research : 03 Chemical Sciences > 0306 Physical Chemistry (incl. Structural) > 030603 Colloid and Surface Chemistry
09 Engineering > 0907 Environmental Engineering > 090799 Environmental Engineering not elsewhere classified
Identification Number or DOI: 10.1016/j.envint.2019.03.065
URI: http://eprints.usq.edu.au/id/eprint/37966

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