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Defluoridation of water using biosorbents

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DOI: 10.4236/ns.2012.44035    6,104 Downloads   11,791 Views   Citations

ABSTRACT

Contamination of drinking water due to fluoride is a severe health hazard problem. Excess of fluoride (>1.5 mg/l) in drinking water is harmful to human health. Various treatment technologies for removing fluoride from groundwater have been investigated. The present study showed that Vetiveria zizanioides, a herbal plant of Kerala—commonly known as Vetiver is an effective adsorbent for the removal of fluoride from aqueous solution. Phosphoric acid activated Vetiver root showed good adsorption capacity than the fresh powdered Vetiver root. Batch sorptive defluoridation was conducted under variable experimental conditions such as pH, agitation time, dose of adsorbent and particle size. Maximum defluoridation was achieved at pH 6; there is a greater possibility of columbic interaction between fluoride ion and adsorbent surface at this pH. The percentage of fluoride removal in- creases with adsorbent dose and time at a given initial solute concentration. The surface and sorption characteristics were analyzed using SEM techniques. Freundlich as well as Langmuir isotherm were plotted and kinetic constants were determined.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Pillai Harikumar, P. , Jaseela, C. and Megha, T. (2012) Defluoridation of water using biosorbents. Natural Science, 4, 245-251. doi: 10.4236/ns.2012.44035.

References

[1] Kharb, P. and Susheela, A.K. (1994) Fluoride ingestion in excess and its effect on organic and certain inorganic constituents of soft tissues. Medical Science Research, 22, 43-44.
[2] Varier, P.S. (1996) Indian medicinal plants: A compendium of 500 species, Vol. 1-5. Orient Longman Ltd., Madras
[3] Antu, C.D. and Harikumar, P.S. (2007) Genesis of fluoride in the shallow unconfined aquifer of muthalmada area in Bharatapuzha Basin. Proceedings of XIX Kerala Science Congress, 29-31 January 2007, Kannur.
[4] Hichour, M., Persin, F., Sandeaux, J. and Gavach, C. (2000) Fluoride removal from waters by Donnan dialysis. Separation and Purification Technology, 18, 1-11. doi:10.1016/S1383-5866(99)00042-8
[5] Folkard, G.K., Grant, W.D. and Sutherland, J.P. (1990) Natural coagulants for small scale water treatment: Potential applications. Experiences in the Development of Small-Scale Water Resources in Rural Areas: Proceedings of the International Symposium on Development of Small- Scale Water Resources in Rural Areas. Carl Duisberg Gesellschaft, South East Asia Program Office, Bangkok, 115-123.
[6] Amor, Z., Malki, S., Taky, M., Bariou, B., Mameri, N. and Elmidaoui, A. (1998) Optimization of fluoride removal from brackish water by electrodialysis. Desalination, 120, 263-271. doi:10.1016/S0011-9164(98)00223-9
[7] Hichour, M., Persin, F., Molenat, J., Sandeaux, J. and Gavach, C. (1999), Fluoride removal from diluted solutions by Donnan dialysis with anion-exchange membranes. Desalination, 122, 53-62. doi:10.1016/S0011-9164(99)00027-2
[8] Rubel, J.F. (1983) The removal of excess fluoride from drinking water by the activated alumina method. In: Shupe, J.L., Peterson, H.P. and Leone, N.C. Eds., Fluoride effects on vegetation animals and humans. Paragon Press, Salt Lake City, 345-349
[9] Yang, M., Hashimoto, T., Hoshi, N. and Myoga, H. (1999) Fluoride removal in a fixed bed packed with granular calcite. Water Research, 33, 3395-3402. doi:10.1016/S0043-1354(99)00052-4
[10] Li, Y.H., Wang, S., Cao, A., Zhao, D., Zhang, X., Xu, C., Luan, Z., Ruan, D., Liang, J., Wu, D. & Wei, B. (2001) Adsorption of fluoride from water by amorphous alumina supported on carbon nanotubes. Chemical Physics Letters, 350, 412-416. doi:10.1016/S0009-2614(01)01351-3
[11] Wang, Y. and Reardon, E.J. (2001) Activation and regeneration of a soil sorbent for defluoridation of drinking water. Applied Geochemistry, 16, 531-539. doi:10.1016/S0883-2927(00)00050-0
[12] Christopher, J., Kenneth, G., Ishida, P. and Richard, M. (2004) Bold testing of drinking water treatment: Copolymers for compatibility with polyamide reverse osmosis membranes. 9th World Filtration Congress, 18-22 April 2004, New Orleans, 1-10.
[13] Srimurali, M., Pragathi, A. and Karthikeyan, J. (1998) A study on removal of fluorides from drinking water by adsorption onto low-cost materials. Environmental Pollution, 99, 285-289. doi:10.1016/S0269-7491(97)00129-2
[14] APHA. (2005) Standard method for the examination of water and waste water. 21st Edition, American Public Health Association, Washington DC, 85-86.
[15] Murugan, M. and Subramanian, E. (2006) Studies on defluoridation of water by Tamarind seed, an unconventional biosorbent. Journal of Water and Health, 4, 453- 461.
[16] Kumar, S., Gupta, A. and Yadav, J.P. (2008) Removal of fluoride by thermally activated carbon prepared from neem (Azadirachta indica) and kikar (Acacia arabica) leaves. Journal of Environmental Biology, 29, 227-232.

  
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