• Davoud Balarak Dept. of Environmental Health, Health Promotion Research Center, School of Public Health, Zahedan University of Medical Sciences, Zahedan, IRAN
  • Yousef Mahdavi Dept. of Environmental Health, Student Research Committee, Mazandaran University of Medical Sciences, Sari, IRAN
  • Ali Joghatayi MSc Student of Environmental Health engineering, Student Research Committee, Qom University of Medical Sciences, Qom, IRAN



SiO2 nanoparticles, Fluoride removal, Equilibrium, Kinetics


Presence of Fluoride in water is safe and effective when used as directed, but it can be harmful at high doses. In the present paper SiO2 nanoparticles as a adsorbent is used for removal of fluoride from aqueous solution. The effect of various operating parameters such as initial concentration of F-, Contact time, adsorbent dosage and pH were investigated. Equilibrium isotherms were used to identify the possible mechanism of the adsorption process. Maximum adsorption capacity of the SiO2 nanoparticles was 49.95 mg/g at PH=6, contact time 20 min, initial concentration of 25 mg/L, and 25±2 ◦C temperatures, when 99.4% of Fwere removed. The adsorption equilibriums were analyzed by Langmuir and Freundlich isotherm models. It was found that the data fitted to Langmuir (R2=0.992) better than Freundlich (R2=0.943) model. Kinetic analyses were conducted using pseudo first-and second-order models. The regression results showed that the adsorption kinetics was more accurately represented by a pseudo second-order model. These results indicate that SiO2 nanoparticles can be used as an effective, low-cost adsorbent to remove fluoride from aqueous solution.


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Zazouli MA, Balarak D, Karimnezhad F, Khosravi F. Removal of fluoride from aqueoussolution by using of adsorption onto modified Lemna minor: adsorption isotherm and kinetics study. Journal of Mazandaran University Medical Sciences 2014;23(109):208-17.

Chidambaram S, Manikandan S, Ramanathan AL, Prasanna MV, Thivya C, Karmegam U, et al. A study on the defluoridation in water by using natural soil. Applied Water Science 2013 3:741–751. DOI:

Fan X, Parker DJ, Smith MD. Adsorption kinetics of fluoride on low cost materials. Water Research. 2003; 37:4929-4937. DOI:

Lavecchi R, Medici F, Piga L, Rinaldi G, Zuorro A. Fluoride Removal from Water by Adsorption on a High Alumina Content Bauxite. Chemical Engineering Transactions. 2012;26:225-30.

Malakootian EM, Moosazadeh M, Yousefi N, Fatehizadeh A. Fluoride removal from aqueous solution by pumice: case study on Kuhbonan water. African Journal of Environmental Science and Technology .2011; 5(4), 299-306.

WHO. Guidelines for drinking-water quality: incorporating first addendum to third edition. Vol 1. Recommendations. Geneva; World Health Organization; 2006. Available from: http://

Gill T, Tiwari S, Kumar PA. A Review on Feasibility of Conventional Fluoride Removal Techniques in Urban Areas.International Journal of Environmental Research and Development 2014.4(2);179-182.

Nath SK, Dutta RK. Fluoride removal from water using cruched limstone. indian journal of chemical technology2010.17:120-5.

Umlong IM, Das B, Devi RR, Borah K, Saikia I M, Raul PK, et al. Defluoridation from aqueous solution using stone dust and activated alumina at a fixed ratio. Apply Water Science 2012 2; 29–36. DOI:

Chen N, Zhang Z, Feng C, Sugiura N, Li M, Chen R. Fluoride removal from water by granular ceramic adsorption. Journal of Colloid and Interface Science 2010 348: 579–584. DOI:

Haghighat GA, Dehghani MH, Nasseri S, Mahvi AH, Rastkari N. Comparison of carbon nonotubes and activated alumina efficiencies in fluoride removal from drinking water. Indian Journal of Science and Technology 2012.5(23):2432-5.

Chakrabarty S., Sarma HP.Defluoridation of ontaminated drinking waterusingneem charcoal adsorbent: kinetic and equilibrium studies. Int J Chem Tech Res.2012; 4, 511–516. .

Kagne S. Jagtap S. Dhawade P. Kamble SP. Devotta S. Rayalu SS. Hydrated Cement: A Promising Adsorbent for the Removal of Fluoride from Aqueous Solution. J Hazard Mater. 2008, 154, 88-95. DOI:

Jahin HS. Fluoride removal from water using nanoscale zero-valent iron. International Water Technology Journal 2014.4(3):173-82.

Eskandarpour A, Onyango MS, Ochieng A, Asai S. Removal of fluoride ions from aqueous solution at low pH using schwertmannite. J. Hazard. Mater. 2008, 152, 571– 579.

Çengeloģlu Y, Kir E, Ersöz M. Removal of fluoride from aqueous solution by using red mud. Sep. Purif. Technol. 2002, 28, 81–86.

Srivastav AL, Singh PK, Srivastava V, Sharma YC. Application of a new adsorbent for fluoride removal from aqueous solutions. J. Hazard. Mater. 2013, 263, 342–352.

Sepehr MN, Sivasankar V, Zarrabi M, Senthil Kumar M. Surface modification of pumice enhancing its fluoride adsorption capacity: An insight into kinetic and thermodynamic studies. Chem. Eng. J. 2013, 228, 192–204.

Tomar V, Prasad S, Kumar D. Adsorptive removal of fluoride from water samples using Zr–Mn composite material. Microchemical Journal 1013;111:116-24. DOI:

Zazouli MA, Mahvi AH, Mahdavi Y, Balarakd D. Isothermic and kinetic modeling of fluoride removal from water by means of the natural biosorbents sorghum and canola. Fluoride. 2015;48(1):15-22.

Zazouli MA, Mahvi AH, Dobaradaran S, Barafrashtehpour M, Mahdavi Y, Balarak D. Adsorption of fluoride from aqueous solution by modified Azolla Filiculoides. Fluoride. 2014;47(4):349-58.

Mohammad A, Majumder CB. Removal of Fluoride from synthetic waste water by using bio adsorbents. International Journal of Research in Engineering and Technology. 2014;3(4):776-86. DOI:

Tor A. Removal of fluoride from an aqueous solution by using montmorillonite. Desalination 2006, 201, 267–276. DOI:

Ma W, Ya FQ, Han M, Wang RJ. Characteristics of equilibrium, kinetics studies for adsorption of fluoride on magnetic-chitosan particle. J. Hazard. Mater. 2007, 143, 296–302.

Zazouli MA, Yazdani J, Balarak D, Ebrahimi M, Mahdavi Y. Removal Acid Blue 113 from Aqueous Solution by Canola. J Mazandaran University Medical Science. 2013; 23(2);73-81.

Diyanati RA, Yousefi Z, Cherati JY, Balarak D. Comparison of phenol adsorption rate by modified Canola and Azolla: An Adsorption Isotherm and Kinetics Study.Journal of Health & Development. 2014; 3(3);17-25.

Balarak D, Mahdavi Y, Gharibi F, Sadeghi Sh. Removal of hexavalent chromium from aqueous solution using canola biomass: Isotherms and kinetics studies. J Adv Environ Health Res.2014; 2(4);45-52.

Balarak D, Pirdadeh F, Mahdavi Y. Biosorption of Acid Red 88 dyes using dried Lemna minor biomass. Journal of Science, Technology & Environment Informatics 2015. 01(02); 81–90. DOI:

Diyanati RA, Balarak D. Survey of efficiency agricultural weast in removal of acid orang 7(AO7) dyes from aqueous solution: kinetic and equilibrium study: Iranian journal of health sciences. 2013;2(1):35-40

Zazouli M. A, Balarak D, Mahdavi Y. Application of Azolla for 2, 4, 6- Trichlorophenol (TCP) Removal from aqueous solutions. Hyhiene sciences.2014; 2(4);17-24.




How to Cite

Balarak, D., Mahdavi, Y., & Joghatayi, A. (2015). ADSORPTION OF FLUORIDE USING SIO2 NANOPARTICLES AS ADSORBENT. International Journal of Engineering Technologies and Management Research, 2(2), 1–9.