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Comparative Review of Defluoridation Efficiency in Wastewater

Dr. Swapnila Roy, Pappu Kumar

Abstract


This present study is highlighted the comparative review of removal efficiency of fluoride in wastewater using different adsorbents. Various adsorbents were mentioned with removal efficiency of fluoride from wastewater. The comparative review as well as graphical plot reveals about the most appropriate fluoride adsorbent in wastewater. In all the cases of defluoridation of waste water, adsorption efficiency of the synthesized adsorbent were analyzed using batch, column, statistical and thermodynamical study. Batch studies using all adsorbents were conducted at different experimental condition to obtain the optimum condition for removal of fluoride present in water. Different process parameters like adsorbent dose, contact time, reaction temperature were investigated to perform the effect of these parameters on the removal efficiency. Optimization of the process parameters has been performed to achieve the better removal capacity of adsorbents. The adsorption isotherm and adsorption capacity of all the adsorbents in batch and column studies were also experimented. The fluoride uptake capacity of the adsorbent were investigated into Langmuir and Freundlich isotherm model and mostly it was observed that Langmuir model can better represent the experimental results. In some cases, Thomas model and the BDST model were used for continuous column studied and it was observed that both model can represented the experimental results. Statistically, response surface methodology (RSM, Design Expert software, latest version) and Artificial Neural Network were utilized to obtain optimum results. Finally, desorption study were conducted in each and every adsorbents in alkaline condition for the regeneration of adsorbents.


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References


Jackson D., Murray J.J. and Fairpo C.G. Lifelong benefits of fluoride in drinking water. British Dental Journal. 1973; 134(10): 419-422.

Susheela A.K. A treatise on fluorosis. Fluoride. 2001; 34: 181-183.

Sharma J.D., Sharma, M.K., Jain P., et.al. Quality Status of Potable Water of Tehsil Sanganer, District- Jaipur, Rajasthan. Asian J. Exp. Sci. 2005; 19(2): 113-118.

Meenakshi, Maheshwari R.C. Fluoride in drinking water and its removal. Journal of Hazardous Matter. 2006; 137(1): 456-463.

Choubisa S.L., Sompura K. Dental fluorosis in tribal villages of Dungerpur district of water with alum. Ind. J. Environ. Health. 1974; 16 (1).

Dinesh C. Fluoride and human health-cause for concern. Ind. Journal of Environment. Protection. 1998; 1(2): 81–89.

Sharma J.D, Sharma M.K., Agrawal P. Effect of Fluoride Contaminated Drinking Water in Albino Rats Rattusnorvegicus. Asian J. Exp. Sci. 2004; 18(1&2): 37-46.

Das P, Roy S. Thermodynamics and kinetics study of de-fluoridation in waste water using hydroxyapatite (Hap) as adsorbent: Optimization using response surface methodology. Frontiers in Nano science and Nanotechnology.2016; 2: 121-128.

Roy S, Das P, Sengupta, et al.,(2017):Calcium impregnated activated charcoal: Optimization and efficiency for the treatment of fluoride containing solution in batch and fixed bed reactor. Process Safety and Environmental Protection. 2017; 109: 18-29.

Roy S, Das P, et al. Assessment on the De-fluoridation using novel Activated Carbon synthesized from Tea Waste: Batch, Statistical Optimization and Mathematical modeling, Journal of Industrial Pollution Control. 2016; 32(2): 544-553

Roy S, Das P, Sengupta, et al. Thermodynamics and kinetics study of defluoridation using Ca-SiO2-TiO2as adsorbent: Column studies and statistical approach. Korean J. Chem. Eng. 2017; 34: 179-188.

Roy S, Sengupta S, Das P, et al., (2017):Integral approach of adsorption and chemical treatment of fluoride containing wastewater: Batch and optimization using RSM. Journal of Environmental Chemical Engineering. 2017; 5(1): 274-282.

Roy S, Sengupta S, Manna S, et al. Rice husk derived silica and its application for its treatment of fluoride containing waste water: Batch study and Modeling using Artificial Neural Network analysis. Desalination and Water Treatment. 2018; 105:73–82.

Roy S, Manna S, Sengupta S, et al. Comparative assessment on de-fluoridation of waste water using chemical and bio-reduced graphene oxide: Batch, thermodynamic, kinetics and optimization using response surface methodology and artificial neural network. Process Safety and Environmental Protection. 2017; 111: 221-231.

Roy S, Das P, et al. Assessment of De-fluoridation in Waste Water Using Activated Biochar: Thermodynamic and Kinetic Study. Journal of Chemistry and Applied Chemical Engineering. 2017; 1(1).


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