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Field Experience of Fluoride Nilogon:A Method of Fluoride Removal from Groundwater


Affiliations
1 Department of Chemical Sciences, Tezpur University, Napaam 784 028, India
 

Field trial of a patented fluoride removal method, based on precipitation–adsorption, has been carried out in some villages of Assam, North East India, with groundwater sources containing 1.8–20 mg/l initial [F–] at small community (220 l) and household (15 l) levels. Pre-acidified water containing 0.68 mM phos-phoric acid was treated in a crushed limestone bed (1–20 mm) for 3 h and filtered through a sand–gravel filter to retain a desired 0.7 mg/l [F–] with pH of 7.44–7.9 and relevant water quality parameters meeting WHO guidelines. A slightly higher dose can totally remove fluoride. The fluoride removal has been found to be independent of initial [F–]. The units have been showing consistent results till now for over five and half years and 4625 batches of use without requiring any interventions like reactivation, replacement or re-plenishment of the limestone bed. With consistent re-moval of fluoride from any initial concentration to a desired concentration, a recurring cost of only Rs 0.005/l of water and an estimated life of the lime-stone bed of about 50 years or 39,000 batches, this safe, environment-friendly and simple method without requiring electricity, has been gaining popularity as Fluoride Nilogon.

Keywords

Fluoride Removal, Groundwater, Hydroxy-apatite, Limestone Defluoridation, Phosphoric Acid.
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  • Susheela, A. K., A treatise on fluorosis. Fluorosis Research and Rural Development Foundation, New Delhi, 2001.

  • WHO, Guidelines for Drinking-Water Quality, Geneva, World Health Organization, 2011, 4th edn, pp. 370–371.

  • Swarup, D. and Dwivedi, S. K., Environmental pollution and effects of lead and fluoride on animal health, Indian Council of Agricultural Research, New Delhi, 2002.

  • Edmunds, M. and Smedley, P., Fluoride in natural waters. In Essentials of Medical Geology, Impacts of Natural Environment on Public Health, Elsevier Academic Press, London, UK, 2005.

  • Ali, S., Thakur, S. K., Sarkar, A. and Shekhar, S., Worldwide contamination of water by fluoride. Environ. Chem. Lett., 2016, 14, 291–315.

  • Dutta, R. K., Saikia, G., Das, B., Bezbaruah, C., Das, H. B. and Dube, S. N., Fluoride contamination in groundwater of central Assam, India. Asian J. Water Environ. Pollut., 2006, 2, 93–100.

  • Das, B., Talukdar, J., Sarma, S., Gohain, B., Dutta, R. K., Das, H. B. and Das, S. C., Fluoride and other inorganic constituents in groundwater of Guwahati, Assam, India. Curr. Sci., 2003, 85, 657–661.

  • BIS, Indian Standard Specification for Drinking Water, IS 10500, Bureau of Indian Standards, New Delhi, 1991, pp. 2–4.

  • Mohapatra, M., Anand, S., Mishra, B. K., Giles, D. E. and Singh, P., Review of fluoride removal from drinking water. J. Environ. Manage., 2009, 91, 67–77.

  • Maheshwari, R. C., Fluoride in drinking water and its removal. J. Hazard. Mater., 2006, 137, 456–463.

  • Bhatnagar, A., Kumar, E. and Sillanpaa, M., Fluoride removal from water by adsorption – a review. Chem. Eng. J., 2011, 171, 811–840.

  • Nawlakhe, W. G., Kulkarni, D. N., Pathak, B. N. and Bulusu, K. R., Defluoridation using the Nalgonda technique in Tanzania. Indian J. Environ. Health, 1975, 17, 26–65.

  • Ndiayea, P. I., Moulin, P., Dominguez, L., Millet, J. C. and Char-bit, F., Removal of fluoride from electronic industrial effluent by RO membrane separation. Desalination, 2005, 173, 25–32.

  • Vasudevan, S., Lakshmi, J. and Sozhan, G., Studies on a Mg–Al–Zn alloy as an anode for the removal of fluoride from drinking wa-ter in an electrocoagulation process. Clean-Soil Air Water, 2009, 37, 372–378.

  • Lhassani, A., Rumeau, M., Benjelloun, D. and Pontie, M., Selective demineralization of water by nanofiltration application to the defluorination of brackish water. Water Res., 2001, 35, 3260–3264.

  • Viswanathan, N. and Meenakshi, S., Selective fluoride adsorption by a hydrotalcite/chitosan composite. Appl. Clay Sci., 2010, 48, 607–611.

  • Meenakshi, S. and Viswanathan, N., Identification of selective ion-exchange resin for fluoride sorption. J. Colloid Interface Sci., 2007, 308, 438–450.

  • Wang, J., Kang, D., Yu, X., Ge, M. and Chen, Y., Synthesis and characterization of Mg–Fe–La trimetal composite as an adsorbent for fluoride removal. Chem. Eng. J., 2015, 264, 506–513.

  • Fan, X., Parker, D. J. and Smith, M. D., Adsorption kinetics of fluoride on low cost materials. Water Res., 2003, 37, 4929–4937.

  • Turner, B. D., Binning, P. and Stipp, S. L. S., Fluoride removal by calcite: evidence for fluorite precipitation and surface adsorption. Environ. Sci. Technol., 2005, 39, 9561–9568.

  • Murutu, C., Onyango, M. S., Ochieng, A. and Otieno, F. A. O., Fluoride removal performance of phosphoric acid treated lime: breakthrough analysis and point-of-use system performance. Water SA, 2012, 38, 279–285.

  • Thole, B., Mtalo, F. and Masamba, W., Groundwater defluorida-tion with raw bauxite, gypsum, magnesite, and their composites. Clean-Soil Air Water, 2012, 40, 1222–1228.

  • Mourabet, M., El Boujaady, H., El Rhilassi, A., Ramdane, H., Bennani-Ziatni, M., El Hamri, R. and Taitai, A., Defluoridation of water using brushite: equilibrium, kinetic and thermodynamic studies. Desalination, 2011, 278, 1–9.

  • Maiti, A., Basu, J. K. and De, S., Chemical treated laterite as promising fluoride adsorbent for aqueous system and kinetic mod-eling. Desalination, 2011, 265, 28–36.

  • Asgari, G., Roshani, B. and Ghanizadeh, G., The investigation of kinetic and isotherm of fluoride adsorption onto functionalize pumice stone. J. Hazard. Mater., 2012, 217, 123–132.

  • Raichur, A. M. and Basu, M. J., Adsorption of fluoride onto mixed rare earth oxides. Sep. Purif. Technol., 2001, 24, 121–127.

  • Li, Y. H. et al., Adsorption of fluoride from aqueous solution by graphene. J. Colloid Interf. Sci., 2011, 363, 348–354.

  • Huang, R. H., Yang, B. C., Liu, Q. and Ding, K. L., Removal of fluoride ions from aqueous solutions using protonated cross-linked chitosan particles. J. Fluorine Chem., 2012, 141, 29–34.

  • Lounici, H., Addour, L., Belhocine, D., Grib, H., Nicolas, S., Bariou, B. and Mameri, N., Study of a new technique for fluoride removal from water. Desalination, 1997, 114, 241–251.

  • Nigussie, W., Zewge, F. and Chandravanshi, B. S., Removal of excess fluoride from water using waste residue from alum manu-facturing process. J. Hazard. Mater., 2007, 147, 954–963.

  • Murutu, C. S., Onyango, M. S., Ochieng, A. and Otieno, F. A., Investigation on limestone derived apatite as a potential low cost adsorbent for drinking water defluoridation; http://www.Ewisa.Co.Za/literature/files/148_101%20murutu.Pdf (accessed on 10 October 2018).

  • Reardon, E. J. and Wang, Y., A limestone reactor for fluoride removal from wastewaters. Environ. Sci. Technol., 2000, 34, 3247–3253.

  • Gogoi, S. and Dutta, R. K., Mechanism of fluoride removal by phosphoric acid-enhanced limestone: equilibrium and kinetics of fluoride sorption. Desalin. Water Treat., 2016, 57, 6838–6851.

  • Nath, S. K. and Dutta, R. K., Enhancement of limestone defluori-dation of water by acetic and citric acids in fixed bed reactor. Clean-Soil Air Water, 2010, 38, 614–622.

  • Nath, S. K. and Dutta, R. K., Fluoride removal from water using crushed limestone. Indian J. Chem. Technol., 2010, 17, 120–125.

  • Nath, S. K. and Dutta, R. K., Acid-enhanced limestone defluorida-tion in column reactor using oxalic acid. Process Saf. Environ. Prot., 2012, 90, 65–75.

  • Nasr, A. B., Walha, K., Puel, F., Mangin, D., Amar, R. B. and Charcosset, C., Precipitation and adsorption during fluoride removal from water by calcite in the presence of acetic acid. De-salin. Water Treat. Prot., 2014, 52, 2231–2240.

  • Gogoi, S., Nath, S. K., Bordoloi, S. and Dutta, R. K., Fluoride removal from groundwater by limestone treatment in presence of phosphoric acid. J. Environ. Manage., 2015, 152, 132–139.

  • Dutta, R. K. and Nath, S. K., A highly efficient defluoridation method by in situ generation of an efficient precipitant and strong adsorbents of fluoride in crushed limestone fixed-bed column and plug flow reactors. Indian Patent No. 2892204, 2017.

  • Narasaraju, T. S. B. and Rai, U. S., Some thermodynamic aspects of dissolution of solid solutions of hydroxylapatites of phosphorus and arsenic. Can. J. Chem., 1979, 57, 2662–2664.

  • APHA, Standard Methods for the Examination of Water and Wastewater, American Public Health Association, New York, USA, 17th edn, 1998.

  • Biswas, K., Gupta, K. and Ghosh, U. C., Adsorption of fluoride by hydrous iron(iii)–tin(iv) bimetal mixed oxide from the aqueous solutions. Chem. Eng. J., 2009, 149, 196–206.

  • Maliyekkal, S. M., Sharma, A. K. and Philip, L., Manganese ox-ide-coated alumina: a promising sorbent for defluoridation of wa-ter. Water Res., 2006, 40, 3497–3506.

  • Ramos, R. L., Ovalle-Turrubiartes, J. and Sanchez-Castillo, M. A., Adsorption of fluoride from aqueous solution on aluminum-impregnated carbon. Carbon, 1999, 37, 609–617.

  • Dahi, E. and Nielsen, J. M., In Proceedings of the 2nd Internation-al Workshop on Fluorosis Prevention and Defluoridation of Water, Ethiopia, 19–25 November 1997.

  • Poinern, G. E. J., Ghosh, M. K., Ng, Y. J., Issa, T. B., Anand, S. and Singh, P., Defluoridation behavior of nanostructured hydroxy-apatite synthesized through an ultrasonic and microwave com-bined technique. J. Hazard. Mater., 2011, 185, 29–37.

  • http://www.Epa.Gov/osw/hazard/wastetypes/wasteid/inorchem/docs/phosphor.pdf

  • US EPA, Method 1311: Toxicity characteristic leaching procedure, US Environmental Protection Agency, Washington, DC, 1992.

  • Nath, S. K. and Dutta, R. K., Significance of calcium containing materials for defluoridation of water: a review. Desalin. Water Treat., 2015, 53, 2070–2085.


Abstract Views: 256

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  • Field Experience of Fluoride Nilogon:A Method of Fluoride Removal from Groundwater

Abstract Views: 256  |  PDF Views: 78

Authors

Rajkamal Mohan
Department of Chemical Sciences, Tezpur University, Napaam 784 028, India
Sweety Gogoi
Department of Chemical Sciences, Tezpur University, Napaam 784 028, India
Anup J. Bora
Department of Chemical Sciences, Tezpur University, Napaam 784 028, India
Gautam Baruah
Department of Chemical Sciences, Tezpur University, Napaam 784 028, India
Shreemoyee Bordoloi
Department of Chemical Sciences, Tezpur University, Napaam 784 028, India
Asadulla A. Ali
Department of Chemical Sciences, Tezpur University, Napaam 784 028, India
Hridip R. Sarma
Department of Chemical Sciences, Tezpur University, Napaam 784 028, India
Robin K. Dutta
Department of Chemical Sciences, Tezpur University, Napaam 784 028, India

Abstract


Field trial of a patented fluoride removal method, based on precipitation–adsorption, has been carried out in some villages of Assam, North East India, with groundwater sources containing 1.8–20 mg/l initial [F–] at small community (220 l) and household (15 l) levels. Pre-acidified water containing 0.68 mM phos-phoric acid was treated in a crushed limestone bed (1–20 mm) for 3 h and filtered through a sand–gravel filter to retain a desired 0.7 mg/l [F–] with pH of 7.44–7.9 and relevant water quality parameters meeting WHO guidelines. A slightly higher dose can totally remove fluoride. The fluoride removal has been found to be independent of initial [F–]. The units have been showing consistent results till now for over five and half years and 4625 batches of use without requiring any interventions like reactivation, replacement or re-plenishment of the limestone bed. With consistent re-moval of fluoride from any initial concentration to a desired concentration, a recurring cost of only Rs 0.005/l of water and an estimated life of the lime-stone bed of about 50 years or 39,000 batches, this safe, environment-friendly and simple method without requiring electricity, has been gaining popularity as Fluoride Nilogon.

Keywords


Fluoride Removal, Groundwater, Hydroxy-apatite, Limestone Defluoridation, Phosphoric Acid.

References





DOI: https://doi.org/10.18520/cs%2Fv118%2Fi2%2F255-263