References
  -  S. Dobaradaran, F. Fazelinia, A.H. Mahvi, S.S. Hosseini,
    Particulate airborne fluoride from an aluminium production
    plant in Arak, Iran, Fluoride, 42 (2009) 228. 
-  S. Dobaradaran, A.H. Mahvi, S. Dehdashti, Fluoride content of
    bottled drinking water available in Iran, Fluoride, 41 (2008) 93. 
-  G. Kashi, A. Mehree, M. Zaeimdar, F. Khoshab, A.M. Madaree,
    Removal of fluoride from urban drinking water by eggshell
    powder, Bulgar. Chem. Commun., 47 (2015) 187–192. 
-  M.R. Boldaji, A. Mahvi, S. Dobaradaran, S. Hosseini, Evaluating
    the effectiveness of a hybrid sorbent resin in removing fluoride
    from water, Int. J. Environ. Sci. Technol., 6 (2009) 629–632. 
-  N. Yousefi, A. Fatehizedeh, K. Ghadiri, N. Mirzaei, S.D. Ashrafi,
    A.H. Mahvi, Application of nanofilter in removal of phosphate,
    fluoride and nitrite from groundwater, Desal. Wat. Treat.,
    57 (2016) 11782–11788. 
-  T. Wu, L. Mao, H. Wang, Adsorption of fluoride from aqueous
    solution by using hybrid adsorbent fabricated with Mg/Fe
    composite oxide and alginate via a facile method, J. Fluorine
    Chem., 200 (2017) 8–17. 
-  S. Dobaradaran, A.H. Mahvi, S. Dehdashti, D.R.V. Abadi,
    I. Tehran, Drinking water fluoride and child dental caries in
    Dashtestan, Iran, Fluoride, 41 (2008) 220–226. 
-  A. Rahmani, K. Rahmani, S. Dobaradaran, A.H. Mahvi,
    R. Mohamadjani, H. Rahmani, Child dental caries in relation to
    fluoride and some inorganic constituents in drinking water in
    Arsanjan, Iran, Fluoride, 43 (2010) 179–186. 
-  A. Rahmani, K. Rahmani, A.H. Mahvi, M. Usefie, Drinking
    water fluoride and child dental caries in Noorabademamasani,
    Iran, Fluoride, 43 (2010) 187. 
-  J. Nouri, A.H. Mahvi, A. Babaei, E. Ahmadpour, Regional
    pattern distribution of groundwater fluoride in the Shush
    aquifer of Khuzestan County, Iran, Fluoride, 39 (2006) 321. 
-  A. Mahvi, M. Zazoli, M. Younecian, B. Nicpour, A. Babapour,
    Survey of fluoride concentration in drinking water sources and
    prevalence of DMFT in the 12 years old students in Behshar
    City, J. Med. Sci., 6 (2006) 658–661. 
-  K. Toshiyuki, S. Nagato, T. Hirajima, K. Sasaki, T. Naruse,
    T. Kawashima, Influence of Mg components in hydroxylated
    calcined dolomite to (co-)precipitation of fluoride with apatites,
  Chem. Eng. J., 285 (2016) 487–496. 
-  H. Pasalari, H.R. Ghaffari, A.H. Mahvi, M. Pourshabanian,
    A. Azari, Activated carbon derived from date stone as natural
    adsorbent for phenol removal from aqueous solution, Desal.
    Wat. Treat., 72 (2017) 406–417. 
-  M.A. Zazouli, A.H. Mahvi, S. Dobaradaran, M. Barafrashtehpour,
    Y. Mahdavi, D. Balarak, Adsorption of fluoride from aqueous
    solution by modified Azolla filiculoides, Adsorption, 47 (2014)
    349–358. 
-  Y.-X. Zhang, Y. Jia, Fluoride adsorption on manganese
    carbonate: ion-exchange based on the surface carbonate-like
    groups and hydroxyl groups, J. Colloid Interface Sci., 510 (2018)
    407–417. 
-  E. Bazrafshan, K.A. Ownagh, A.H. Mahvi, Application of
    electrocoagulation process using iron and aluminum electrodes
    for fluoride removal from aqueous environment, J. Chem.,
    9 (2012) 2297–2308. 
-  W.-T. Tsai, K.-J. Hsien, H.-C. Hsu, C.-M. Lin, K.-Y. Lin, C.-H.
    Chiu, Utilization of ground eggshell waste as an adsorbent for
    the removal of dyes from aqueous solution, Bioresour. Technol.,
    99 (2008) 1623–1629. 
-  H.H. Abdel Ghafar, G.A. Ali, O.A. Fouad, S.A. Makhlouf,
    Enhancement of adsorption efficiency of methylene blue
	  on Co3O4/SiO2 nanocomposite, Desal. Wat. Treat., 53 (2015)
  2980–2989. 
-  O.A. Habeeb, G.A. Ali, Low-cost and eco-friendly activated
    carbon from modified palm kernel shell for hydrogen sulfide
    removal from wastewater: adsorption and kinetic studies,
    Desal. Wat. Treat., 84 (2017) 205–214. 
-  E.N. Zare, M.M. Lakouraj, M. Masoumi, Efficient removal
    of Pb (II) and Cd (II) from water by cross-linked poly
	  (N-vinylpyrrolidone-co-maleic anhydride)@eggshell/Fe3O4
    environmentally friendly nano composite, Desal. Wat. Treat.,
  106 (2018) 209–219. 
-  K. Chojnacka, Biosorption of Cr (III) ions by eggshells, J. Hazard.
    Mater., 121 (2005) 167–173. 
-  M.N. Sepehr, K. Yetilmezsoy, S. Marofi, M. Zarrabi, H.R.
    Ghaffari, M. Fingas, M. Foroughi, Synthesis of nanosheet
    layered double hydroxides at lower pH: optimization of
    hardness and sulfate removal from drinking water samples,
    J. Taiwan Inst. Chem. Eng., 45 (2014) 2786–2800. 
-  R. Tovar-Gómez, M. Moreno-Virgen, J. Dena-Aguilar,
    V. Hernández-Montoya, A. Bonilla-Petriciolet, M. Montes-Morán, Modeling of fixed-bed adsorption of fluoride on bone
    char using a hybrid neural network approach, Chem. Eng. J.,
  228 (2013) 1098–1109. 
-  S.K. Ghadiri, S. Nasseri, R. Nabizadeh, M. Khoobi, S. Nazmara,
    A.H. Mahvi, Adsorption of nitrate onto anionic bio-graphene
    nanosheet from aqueous solutions: isotherm and kinetic study,
    J. Mol. Liq., 242 (2017) 1111–1117. 
-  I. Oke, N. Olarinoye, S. Adewusi, Adsorption kinetics for
    arsenic removal from aqueous solutions by untreated powdered
    eggshell, Adsorption, 14 (2008) 73–83. 
-  S. Ashrafi, H. Kamani, H. Soheil Arezomand, N. Yousefi,
    A. Mahvi, Optimization and modeling of process variables for
    adsorption of Basic Blue 41 on NaOH-modified rice husk using
    response surface methodology, Desal. Wat. Treat., 57 (2016)
    14051–14059. 
-  M. Shams, M.H. Dehghani, R. Nabizadeh, A. Mesdaghinia,
    M. Alimohammadi, A.A. Najafpoor, Adsorption of phosphorus
    from aqueous solution by cubic zeolitic imidazolate
    framework-8: Modeling, mechanical agitation versus sonication,
    J. Mol. Liq., 224 (2016) 151–157. 
-  S. Pourfadakari, N. Yousefi, A.H. Mahvi, Removal of Reactive
    Red 198 from aqueous solution by combined method multiwalled
    carbon nanotubes and zero-valent iron: equilibrium,
    kinetics, and thermodynamic, Chin. J. Chem. Eng., 24 (2016)
    1448–1455. 
-  M. Malakootian, A. Fatehizadeh, N. Yousefi, Evaluating the
    effectiveness of modified pumice in fluoride removal from
    water, Asian J. Chem., 23 (2011) 3691. 
-  M.A. Zazouli, D. Belarak, F. Karimnezhad, F. Khosravi, Removal
    of fluoride from aqueous solution by using of adsorption onto
    modified Lemna minor: adsorption isotherm and kinetics study,
    J. Mazandaran Univ. Med. Sci., 23 (2014) 195–204. 
-  M.A. Zazouli, A.H. Mahvi, Y. Mahdavi, D. Balarak, Isothermic
    and kinetic modeling of fluoride removal from water by means
    of the natural biosorbents sorghum and canola, Fluoride, 48
    (2015) 37. 
-  V.K. Gupta, S. Agarwal, H. Sadegh, G.A. Ali, A.K. Bharti, A.S.H.
    Makhlouf, Facile route synthesis of novel graphene oxide-β-cyclodextrin nanocomposite and its application as adsorbent
    for removal of toxic bisphenol A from the aqueous phase, J. Mol.
    Liq., 237 (2017) 466–472. 
-  S. Agarwal, H. Sadegh, M. Monajjemi, A.S. Hamdy, G.A. Ali,
    A.O. Memar, R. Shahryari-Ghoshekandi, I. Tyagi, V.K. Gupta,
    Efficient removal of toxic bromothymol blue and methylene
    blue from wastewater by polyvinyl alcohol, J. Mol. Liq., 218
    (2016) 191–197. 
-  H. Sadegh, G.A. Ali, A.S.H. Makhlouf, K.F. Chong, N.S. Alharbi,
	  S. Agarwal, V.K. Gupta, MWCNTs-Fe3O4 nanocomposite for Hg
    (II) high adsorption efficiency, J. Mol. Liq., 258 (2018) 345–353. 
-  A.H. Omar, K. Ramesh, A.A. Gomaa, Experimental design
    technique on removal of hydrogen sulfide using CaO-eggshells
    dispersed onto palm kernel shell activated carbon: experiment,
    optimization, equilibrium and kinetic studies, J. Wuhan Univ.
    Technol.-Mater. Sci. Ed., 32 (2017) 305–320. 
-  H. Hossaini, A. Fatehizadeh, N. Yousefi, S. Reshadat, N.R. Gilan,
    S. Ghasemi, M. Ahmadian, Application of Enhanced Softening
    Process in Slaughterhouse Wastewater Treatment, 2013. 
-  D. Balarak, Y. Mahdavi, E. Bazrafshan, A.H. Mahvi,
    Y. Esfandyari, Adsorption of fluoride from aqueous solutions
    by carbon nanotubes: determination of equilibrium, kinetic,
    and thermodynamic parameters, Adsorption, 2016.