35 FAO (2013). Statistical Yearbook. World Food and Agriculture, 289. Rome: Food and Agriculture Organization of the United Nations.
36 Fawell, J., Bailey, K., Chilton, J. et al. (2006). Fluoride in Drinking‐Water. IWA publishing.
37 George, S., Pandit, P., and Gupta, A.B. (2010). Residual aluminium in water defluoridated using activated alumina adsorption–Modeling and simulation studies. Water Research 44 (10): 3055–3064.
38 Gleeson, T., Wada, Y., Bierkens, M.F., and Van Beek, L.P. (2012). Water balance of global aquifers revealed by groundwater footprint. Nature 488 (7410): 197–200.
39 Ghosh, A., Mukherjee, K., Ghosh, S.K., and Saha, B. (2013). Sources and toxicity of fluoride in the environment. Research on Chemical Intermediates 39 (7): 2881–2915.
40 Gowrisankar, G., Jagadeshan, G., and Elango, L. (2017). Managed aquifer recharge by a check dam to improve the quality of fluoride‐rich groundwater: a case study from southern India. Environmental Monitoring and Assessment 189 (4): 200.
41 Guissouma, W., Hakami, O., Al‐Rajab, A.J., and Tarhouni, J. (2017). Risk assessment of fluoride exposure in drinking water of Tunisia. Chemosphere 177: 102–108.
42 Gupta, S.K., Deshpande, R.D., Agarwal, M., and Raval, B.R. (2005). Origin of high fluoride in groundwater in the North Gujarat‐Cambay region, India. Hydrogeology Journal 13 (4): 596–605.
43 Gupta, N., Yadav, K.K., Kumar, V., and Singh, D. (2013). Assessment of physicochemical properties of Yamuna River in Agra City. International Journal of ChemTech Research 5 (1): 528–531.
44 Gupta, N., Yadav, K.K., and Kumar, V. (2015). A review on current status of municipal solid waste management in India. Journal of Environmental Sciences 37: 206–217.
45 Gupta, N., Yadav, K.K., Kumar, V. et al. (2019). Trace elements in soil‐vegetables interface: translocation, bioaccumulation, toxicity and amelioration‐a review. Science of the Total Environment 651: 2927–2942.
46 Hoinkis, J., Valero‐Freitag, S., Caporgno, M.P., and Pätzold, C. (2011). Removal of nitrate and fluoride by nanofiltration–a comparative study. Desalination and Water Treatment 30 (1–3): 278–288.
47 Hu, C.Y., Lo, S.L., and Kuan, W.H. (2005). Effects of the molar ratio of hydroxide and fluoride to Al (III) on fluoride removal by coagulation and electrocoagulation. Journal of Colloid and Interface Science 283 (2): 472–476.
48 Itai, K., Onoda, T., Nohara, M. et al. (2010). Serum ionic fluoride concentrations are related to renal function and menopause status but not to age in a Japanese general population. ClinicaChimicaActa 411 (3–4): 263–266.
49 Jain, M., Kulshrestha, U.C., Sarkar, A.K., and Parashar, D.C. (2000). Influence of crustal aerosols on wet deposition at urban and rural sites in India. Atmospheric Environment 34 (29–30): 5129–5137.
50 Jacks, G., Bhattacharya, P., Chaudhary, V., and Singh, K.P. (2005). Controls on the genesis of some high‐fluoride groundwaters in India. Applied Geochemistry 20 (2): 221–228.
51 Jagtap, S., Yenkie, M.K., Labhsetwar, N., and Rayalu, S. (2012). Fluoride in drinking water and defluoridation of water. Chemical Reviews 112 (4): 2454–2466.
52 Jayarathne, T., Stockwell, C.E., Yokelson, R.J. et al. (2014). Emissions of fine particle fluoride from biomass burning. Environmental Science & Technology 48 (21): 12636–12644.
53 Kanchan, S., Kumar, V., Yadav, K.K. et al. (2015). Effect of fly ash disposal on ground water quality near Parichha thermal power plant, Jhansi‐a case study. Current World Environment 10 (2): 572.
54 Kanduti, D., Sterbenk, P., and Artnik, B. (2016). Fluoride: a review of use and effects on health. Materia Socio‐Medica 28 (2): 133.
55 Khatibikamal, V., Torabian, A., Janpoor, F., and Hoshyaripour, G. (2010). Fluoride removal from industrial wastewater using electrocoagulation and its adsorption kinetics. Journal of Hazardous Materials 179 (1–3): 276–280.
56 Kobya, M., Demirbas, E., and Ulu, F. (2016). Evaluation of operating parameters with respect to charge loading on the removal efficiency of arsenic from potable water by electrocoagulation. Journal of Environmental Chemical Engineering 4 (2): 1484–1494.
57 Kruse, E. and Ainchil, J. (2003). Fluoride variations in groundwater of an area in Buenos Aires Province, Argentina. Environmental Geology 44 (1): 86–89.
58 Kumar, S. and Gopal, K. (2000). A review on fluorosis and its preventive strategies. Indian Journal of Environmental Protection 20 (6): 430–440.
59 Kundu, M.C. and Mandal, B. (2009). Assessment of potential hazards of fluoride contamination in drinking groundwater of an intensively cultivated district in West Bengal, India. Environmental Monitoring and Assessment 152 (1–4): 97.
60 Kundu, N., Panigrahi, M., Tripathy, S. et al. (2001). Geochemical appraisal of fluoride contamination of groundwater in the Nayagarh District of Orissa, India. Environmental Geology 41 (3–4): 451–460.
61 Li, X., Hou, X., Zhou, Z., and Liu, L. (2011). Geochemical provenance and spatial distribution of fluoride in groundwater of Taiyuan basin, China. Environmental Earth Sciences 62 (8): 1635–1642.
62 Madhnure, P., Sirsikar, D.Y., Tiwari, A.N. et al. (2007). Occurrence of fluoride in the groundwaters of Pandharkawada area, Yavatmal district, Maharashtra, India. Current Science 92 (5): 675–679.
63 Malakootian, M., Yousefi, N., and Fatehizadeh, A. (2011). Survey efficiency of electrocoagulation on nitrate removal from aqueous solution. International Journal of Environmental Science and Technology 8 (1): 107–114.
64 Maurya, P.K., Malik, D.S., Yadav, K.K. et al. (2019). Bioaccumulation and potential sources of heavy metal contamination in fish species in river Ganga basin: possible human health risks evaluation. Toxicology Reports 6: 472–481.
65 Mazighi, A., Lounici, H., Drouiche, N. et al. (2015). Economic study of groundwater defluoridation of the North African Sahara. Desalination and Water Treatment 54 (10): 2681–2691.
66 Misra, A.K., Mishra, A., and Premraj (2006). Escalation of groundwater fluoride in the Ganga alluvial plain of India. Fluoride 39 (1): 35–38.
67 Moore, R.B., 2004. Quality of water in the fractured‐bedrock aquifer of New Hampshire (No. 2004). US Department of the Interior, US Geological Survey.
68 Msonda, K.W.M., Masamba, W.R.L., and Fabiano, E. (2007). A study of fluoride groundwater occurrence in Nathenje, Lilongwe, Malawi. Physics and Chemistry of the Earth, Parts A/B/C 32 (15–18): 1178–1184.
69 Mukherjee, I. and Singh, U.K. (2018). Groundwater fluoride contamination, probable release, and containment mechanisms: a review on Indian context. Environmental Geochemistry and Health 40 (6): 2259–2301.
70 Muralidharan, D., Nair, A.P., and Sathyanarayana, U. (2002). Fluoride in shallow aquifers in Rajgarh Tehsil of Churu District, Rajasthan–an arid environment. Current Science 83 (6): 699–702.
71 Naseem, S., Rafique, T., Bashir, E. et al. (2010). Lithological influences on occurrence of high‐fluoride groundwater in Nagar Parkar area, Thar Desert, Pakistan. Chemosphere 78 (11): 1313–1321.
72 Nasr, A.B., Charcosset, C., Amar, R.B., and Walha, K. (2013). Defluoridation of water by nanofiltration. Journal of Fluorine Chemistry 150: 92–97.
73 Noling, C. (2004). New electrocoagulation system addresses challenges of industrial storm, wash water. Industrial WaterWorld 5 (4): 22.
74 Ozsvath, D.L. (2006). Fluoride concentrations in a crystalline bedrock aquifer Marathon County, Wisconsin. Environmental Geology 50 (1): 132–138.
75 Ozsvath, D.L. (2009). Fluoride and environmental health: a review. Reviews in Environmental Science and Bio/Technology 8 (1): 59–79.
76 Podgorski, J.E., Labhasetwar, P., Saha, D., and Berg, M. (2018). Prediction modeling and mapping of groundwater fluoride contamination throughout India. Environmental Science & Technology 52 (17): 9889–9898.
77 Queste,