References

1. M. Ferrante, G.O. Conti, Z. Rasic-Milutinovic, D. Jovanovic, Health Effects of Metals and Related Substances in Drinking Water, IWA Publishing, London, UK, 2013.
2. Minamata Convention on Mercury: Text and Annexes, United Nations Environment Programme, Geneva, Switzerland, 2013.
3. K. Tanong, L. Coudert, G. Mercier, J.-F. Blais, Recovery of metals from a mixture of various spent batteries by a hydrometallurgical process, J. Environ. Manage., 181 (2016) 95–107.
4. Directive 2013/39/EU of the European Parliament and of the Council of 12 August 2013 Amending Directives 2000/60/EC and 2008/105/EC as Regards Priority Substances in the Field of Water Policy, O.J., L 226 (2013) 1–17.
5. P.-S. Keng, S.-L. Lee, S.-T. Ha, Y.-T. Hung, S.-T. Ong, Removal of hazardous heavy metals from aqueous environment by lowcost adsorption materials, Environ. Chem. Lett., 12 (2014) 15–25.
6. R. Apiratikul, P. Pavasant, Sorption of Cu²⁺, Cd²⁺, and Pb²⁺ using modified zeolite from coal fly ash, Chem. Eng. J., 144 (2008) 245–258.
7. Y.J.O. Asencios, M.R. Sun-Kou, Synthesis of high-surface-area γ-Al₂O₃ from aluminum scrap and its use for the adsorption of metals: Pb (II), Cd (II) and Zn (II), Appl. Surf. Sci., 258 (2012) 10002–10011.
8. Y. Zhou, S. Xia, J. Zhang, Z. Zhang, S.W. Hermanowicz, Adsorption characterizations of biosorbent extracted from waste activated sludge for Pb (II) and Zn (II), Desal. Wat. Treat., 57 (2016) 9343–9353.
9. R. Sánchez-Hernández, A. López-Delgado, I. Padilla, R. Galindo, S. López-Andrés, One-step synthesis of NaP1, SOD and ANA from a hazardous aluminum solid waste, Microporous Mesoporous Mater., 226 (2016) 267–277.
10. R. Galindo, I. Padilla, O. Rodríguez, R. Sánchez-Hernández, S. López-Andrés, A. López-Delgado, Characterization of solid wastes from aluminum tertiary sector: the current state of Spanish industry, J. Mineral. Mater. Charact. Eng., 3 (2015) 55.
11. R. Sánchez-Hernández, I. Padilla, S. López-Andrés, A. López-Delgado, Eco-friendly bench-scale zeolitization of an Al-containing waste into gismondine-type zeolite under effluent recycling, J. Cleaner Prod., 161 (2017) 792–802.
12. Directive 2008/98/EC of the European Parliament and of the Council of 19 November 2008 on waste and repealing certain Directives (Text with EEA relevance), O.J., L 312, 2008, pp. 3–30.
13. X. Kong, Z. Han, W. Zhang, L. Song, H. Li, Synthesis of zeolitesupported microscale zero-valent iron for the removal of Cr⁶⁺ and Cd²⁺ from aqueous solution, J. Environ. Manage., 169 (2016) 84–90.
14. C. Li, H. Zhong, S. Wang, J. Xue, Z. Zhang, A novel conversion process for waste residue: synthesis of zeolite from electrolytic manganese residue and its application to the removal of heavy metals, Colloids Surf., A, 470 (2015) 258–267.
15. V. Hernández-Montoya, M.A. Pérez-Cruz, D.I. Mendoza- Castillo, M.R. Moreno-Virgen, A. Bonilla-Petriciolet, Competitive adsorption of dyes and heavy metals on zeolitic structures, J. Environ. Manage., 116 (2013) 213–221.
16. P. Barragán, M.G. Macedo, M.T. Olguín, Cadmium sorption by sodium and thiourea-modified zeolite-rich tuffs, J. Environ. Sci., 52 (2017) 39–48.
17. S.Y. Lagergren, Zur Theorie der sogenannten Adsorption gelöster Stoffe, K. Sven. Vetenskakad. handl., 24 (1898) 1–39.
18. G. Blanchard, M. Maunaye, G. Martin, Removal of heavy metals from waters by means of natural zeolites, Water Res., 18 (1984) 1501–1507.
19. W.J. Weber, J.C. Morris, Kinetics of adsorption on carbon from solution, J. Sanit. Eng. Div., 89 (1963) 31–60.
20. H.N. Tran, S.-J. You, A. Hosseini-Bandegharaei, H.-P. Chao, Mistakes and inconsistencies regarding adsorption of contaminants from aqueous solutions: a critical review, Water Res., 120 (2017) 88–116.
21. I. Langmuir, The adsorption of gases on plane surfaces of glass, mica and platinum, J. Am. Chem. Soc., 40 (1918) 1361–1403.
22. H.M.F. Freundlich, Over the adsorption in solution, J. Phys. Chem., 57 (1906) 385–471.
23. M.M. Dubinin, L.V. Radushkevich, Equation of the characteristic curve of activated charcoal, Proc. Acad. Sci. Phys. Chem. Section., 55 (1947) 331–333.
24. O. Redlich, D.L. Peterson, A useful adsorption isotherm, J. Phys. Chem., 63 (1959) 1024–1024.
25. J. Toth, State equations of the solid-gas interface layers, Acta Chim. Acad. Sci. Hung., 69 (1971) 311–328.
26. R. Sips, On the structure of a catalyst surface, J. Chem. Phys., 16 (1948) 490–495.
27. O. Larlus, S. Mintova, T. Bein, Environmental syntheses of nanosized zeolites with high yield and monomodal particle size distribution, Microporous Mesoporous Mater., 96 (2006) 405–412.
28. S. Vallar, D. Houivet, J. El Fallah, D. Kervadec, J.M. Haussonne, Oxide slurries stability and powders dispersion: optimization with zeta potential and rheological measurements, J. Eur. Ceram. Soc., 19 (1999) 1017–1021.
29. P. Scherrer, Estimation of the size and internal structure of colloidal particles by means of röntgen, Nachr. Ges. Wiss. Göttingen, 2 (1918) 96–100.
30. G. Gillies, R. Raj, F.-D. Kopinke, A. Georgi, Suspension stability and mobility of Trap-Ox Fe-zeolites for in-situ nanoremediation, J. Colloid Interface Sci., 501 (2017) 311–320.
31. M. Kosmulski, IEP as a parameter characterizing the pH-dependent surface charging of materials other than metal oxides, Adv. Colloid Interface Sci., 171–172 (2012) 77–86.
32. N. Arancibia-Miranda, S.E. Baltazar, A. García, D. Muñoz-Lira, P. Sepúlveda, M.A. Rubio, D. Altbir, Nanoscale zero valent supported by zeolite and montmorillonite: template effect of the removal of lead ion from an aqueous solution, J. Hazard. Mater., 301 (2016) 371–380.
33. M.R. Das, J.M. Borah, W. Kunz, B.W. Ninham, S. Mahiuddin, Ion specificity of the zeta potential of α-alumina, and of the adsorption of p-hydroxybenzoate at the α-alumina-water interface, J. Colloid Interface Sci., 344 (2010) 482–491.
34. J.A. Menendez, M.J. Illán-Gómez, C.A. León y León, L.R. Radovic, On the difference between the isoelectric point and the point of zero charge of carbons, Carbon, 33 (1995) 1655–1657.
35. Y. Zhou, S. Xia, J. Zhang, B.T. Nguyen, Z. Zhang, Insight into the influences of pH value on Pb (II) removal by the biopolymer extracted from activated sludge, Chem. Eng. J., 308 (2017) 1098–1104.
36. D. Datta, H. Uslu, Adsorptive separation of lead (Pb²⁺) from aqueous solution using tri-n-octylamine supported montmorillonite, J. Chem. Eng. Data, 62 (2017) 370–375.
37. M. Zhu, L. Zhu, J. Wang, T. Yue, R. Li, Z. Li, Adsorption of Cd (II) and Pb (II) by in situ oxidized Fe₃O₄ membrane grafted on 316L porous stainless steel filter tube and its potential application for drinking water treatment, J. Environ. Manage., 196 (2017) 127–136.
38. Y. Yan, Q. Li, X. Sun, Z. Ren, F. He, Y. Wang, L. Wang, Recycling flue gas desulphurization (FGD) gypsum for removal of Pb (II) and Cd (II) from wastewater, J. Colloid Interface Sci., 457 (2015) 86–95.
39. Y. Fernández-Nava, M. Ulmanu, I. Anger, E. Marañón, L. Castrillón, Use of granular bentonite in the removal of mercury (II), cadmium (II) and lead (II) from aqueous solutions, Water Air Soil Pollut., 215 (2011) 239–249.
40. C.S. Cundy, P.A. Cox, The hydrothermal synthesis of zeolites: precursors, intermediates and reaction mechanism, Microporous Mesoporous Mater., 82 (2005) 1–78.
41. X. Li, C. Bian, X. Meng, F.-S. Xiao, Design and synthesis of an efficient nanoporous adsorbent for Hg²⁺ and Pb²⁺ ions in water, J. Mater. Chem. A, 4 (2016) 5999–6005.
42. A. Gil, S. Albeniz, S.A. Korili, Valorization of the saline slags generated during secondary aluminium melting processes as adsorbents for the removal of heavy metal ions from aqueous solutions, Chem. Eng. J., 251 (2014) 43–50.
43. R.R.Z. Tarpani, F.R. Lapolli, M.Á. Lobo-Recio, Removal of aluminum from synthetic solutions and well water by chitin: batch and continuous experiments, Desal. Wat. Treat., 53 (2015) 3531–3542.
44. E. Worch, Adsorption Technology in Water Treatment: Fundamentals, Processes, and Modeling, Walter de Gruyter, Germany, 2012.
45. S. Wang, Y. Peng, Natural zeolites as effective adsorbents in water and wastewater treatment, Chem. Eng. J., 156 (2010) 11–24.
46. W. Mozgawa, M. Król, T. Bajda, Application of IR spectra in the studies of heavy metal cations immobilization on natural sorbents, J. Mol. Struct., 924–926 (2009) 427–433.
47. Q. Meng, H. Chen, J. Lin, Z. Lin, J. Sun, Zeolite A synthesized from alkaline assisted pre-activated halloysite for efficient heavy metal removal in polluted river water and industrial wastewater, J. Environ. Sci., 56 (2017) 254–262.
48. M. Naushad, Z.A. ALOthman, M.R. Awual, M.M. Alam, G.E. Eldesoky, Adsorption kinetics, isotherms, and thermodynamic studies for the adsorption of Pb²⁺ and Hg²⁺ metal ions from aqueous medium using Ti (IV) iodovanadate cation exchanger, Ionics, 21 (2015) 2237–2245.
49. M. Naushad, Z.A. Alothman, Inamuddin, H. Javadian, Removal of Pb (II) from aqueous solution using ethylene diamine tetra acetic acid-Zr (IV) iodate composite cation exchanger: kinetics, isotherms and thermodynamic studies, J. Ind. Eng. Chem., 25 (2015) 35–41.
50. R. Bushra, M. Naushad, R. Adnan, Z.A. Alothman, M. Rafatullah, Polyaniline supported nanocomposite cation exchanger: synthesis, characterization and applications for the efficient removal of Pb²⁺ ion from aqueous medium, J. Ind. Eng. Chem., 21 (2015) 1112–1118.
51. R. Shawabkeh, A. Al-Harahsheh, M. Hami, A. Khlaifat, Conversion of oil shale ash into zeolite for cadmium and lead removal from wastewater, Fuel, 83 (2004) 981–985.
52. M. Ghasemi, M. Naushad, N. Ghasemi, Y. Khosravi-fard, A novel agricultural waste based adsorbent for the removal of Pb (II) from aqueous solution: kinetics, equilibrium and thermodynamic studies, J. Ind. Eng. Chem., 20 (2014) 454–461.
53. M. Kragović, A. Daković, Ž. Sekulić, M. Trgo, M. Ugrina, J. Perić, G.D. Gatta, Removal of lead from aqueous solutions by using the natural and Fe (III)-modified zeolite, Appl. Surf. Sci., 258 (2012) 3667–3673.
54. M. Ghasemi, M. Naushad, N. Ghasemi, Y. Khosravi-fard, Adsorption of Pb (II) from aqueous solution using new adsorbents prepared from agricultural waste: adsorption isotherm and kinetic studies, J. Ind. Eng. Chem., 20 (2014) 2193–2199.
55. M. Naushad, T. Ahamad, Z.A. Alothman, M.A. Shar, N.S. AlHokbany, S.M. Alshehri, Synthesis, characterization and application of curcumin formaldehyde resin for the removal of Cd²⁺ from wastewater: kinetics, isotherms and thermodynamic studies, J. Ind. Eng. Chem., 29 (2015) 78–86.
56. H. Ghassabzadeh, A. Mohadespour, M. Torab-Mostaedi, P. Zaheri, M.G. Maragheh, H. Taheri, Adsorption of Ag, Cu and Hg from aqueous solutions using expanded perlite, J. Hazard. Mater., 177 (2010) 950–955.
57. M.A.O. Lourenço, P. Figueira, E. Pereira, J.R.B. Gomes, C.B. Lopes, P. Ferreira, Simple, mono and bifunctional periodic mesoporous organosilicas for removal of priority hazardous substances from water: the case of mercury(II), Chem. Eng. J., 322 (2017) 263–274.
58. R. Bushra, M. Naushad, G. Sharma, A. Azam, Z.A. ALOthman, Synthesis of polyaniline based composite material and its analytical applications for the removal of highly toxic Hg²⁺ metal ion: antibacterial activity against E. coli, Korean J. Chem. Eng., 34 (2017) 1970–1979.
59. M. Naushad, T. Ahamad, G. Sharma, A.a.H. Al-Muhtaseb, A.B. Albadarin, M.M. Alam, Z.A. Alothman, S.M. Alshehri, A.A. Ghfar, Synthesis and characterization of a new starch/SnO₂ nanocomposite for efficient adsorption of toxic Hg²⁺ metal ion, Chem. Eng. J., 300 (2016) 306–316.
60. M. Naushad, S. Vasudevan, G. Sharma, A. Kumar, Z.A. Alothman, Adsorption kinetics, isotherms, and thermodynamic studies for Hg²⁺ adsorption from aqueous medium using alizarin red-S-loaded amberlite IRA-400 resin, Desal. Wat. Treat., 57 (2016) 18551–18559.
61. M. Naushad, T. Ahamad, B.M. Al-Maswari, A. Abdullah Alqadami, S.M. Alshehri, Nickel ferrite bearing nitrogen-doped mesoporous carbon as efficient adsorbent for the removal of highly toxic metal ion from aqueous medium, Chem. Eng. J., 330 (2017) 1351–1360.