1. P. Soderland, S. Lovekar, D.E. Weiner, D.R. Brooks, J.S. Kaufman, Chronic kidney disease associated with environmental toxins and exposures, Adv. Chronic Kidney Dis., 17 (2010) 254–264.
  2. J. Pan, J.A. Plant, N. Voulvoulis, C.J. Oates, C. Ihlenfeld, Cadmium levels in Europe: implications for human health, Environ. Geochem. Health, 32 (2010) 1–12.
  3. L. Liu, H. Chen, P. Cai, W. Liang, Q. Huang, Immobilization and phytotoxicity of Cd in contaminated soil amended with chicken manure compost, J. Hazard. Mater., 163 (2009) 563–567.
  4. H. Hu, R. Shih, S. Rothenberg, B.S. Schwartz, The epidemiology of lead toxicity in adults: measuring dose and consideration of other methodologic issues, Environ. Health Perspect., 115 (2007) 455–462.
  5. E. Obi, D.N. Akunyili, B. Ekpo, O.E. Orisakwe, Heavy metal hazards of Nigerian herbal remedies, Sci. Total Environ., 369 (2006) 35–41.
  6. C. Behera, R. Rautji, T.D. Dogra, An unusual suicide with parenteral copper sulfate poisoning, Med. Sci. Law, 47 (2007) 357–358.
  7. G. Cimino, A. Passerini, G. Toscano, Removal of toxic cations and Cr(VI) from aqueous solution by hazelnut shell, Water Res., 34 (2000) 2955–2962.
  8. A.A. Abia, M. Horsfall, O. Didi, The use of chemically modified and unmodified cassava waste for the removal of Cd, Cu and Zn ions from aqueous solution, Bioresour. Technol., 90 (2003) 345–348.
  9. P.A. Brown, S.A. Gill, S.J. Allen, Metal removal from wastewater using peat, Water Res., 34 (2000) 3907–3916.
  10. M. Danish, R. Hashim, M.N.Mohamad Ibrahim, O. Slaiman, Optimized preparation for large surface area activated carbon from date (Phoenix dactylifera L.) stone biomass, Biomass Bioenergy, 61 (2014) 167–178.
  11. V.C. Srivastava, I.D. Mall, I.M. Mishra, Removal of cadmium(II) and zinc(II) metal ions from binary aqueous solution by rice husk ash, Colloids Surf., A, 312 (2008) 172–184.
  12. M. Huang, Z. Li, B. Huang,N. Lou, Q. Zhang, X. Zhai, G. Zeng, Investigating binding characteristics of cadmium and copper to DOM derived from the compost and rice straw using EEMPARAFAC combind with two-dimensional FTIR correlation analyses, J. Hazard. Mater., 344 (2018) 539–548.
  13. C.G. Rocha, D.A.M. Zaia, R.V. da Silva Alfaya, A.A. da Silva Alfaya, Use of rice straw as biosorbent for removal of Cu(II), Zn(II), Cd(II) and Hg(II) ions in industrial effluents, J. Hazard. Mater., 166 (2009) 383–388.
  14. T.K. Naiya, P. Chowdhury, A.K. Bhattacharya, S.K. Das, Saw dust and neem bark as low-cost natural biosorbent for adsorptive removal of Zn(II) and Cd(II) ions from aqueous solutions, Chem. Eng. J., 148 (2009) 68–79.
  15. X. Xu, X. Cao, L. Zhao, H. Wang, H. Yu, B. Gao, Removal of Cu, Zn, and Cd from aqueous solutions by the dairy manurederived biochar, Environ. Sci. Pollut. Res., 20 (2013) 358–368.
  16. A.Z.M. Badruddoza, Z.B.Z. Shawon, W.J.D. Tay, K. Hidajat, M.S. Uddin, Fe3O4/cyclodextrin polymer nanocomposites for selective heavy metals removal from industrial wastewater, Carbohydr. Polym., 91 (2013) 322–332.
  17. D.J.L. Guerra, J. Goco, J. Nascimento, I. Melo, Adsorption of divalent metals on natural and functionalized nontronite hybrid surfaces: an evidence of the chelate effect, J. Saudi Chem. Soc., 20 (2016) S552–S565.
  18. I. Mobasherpour, E. Salahi, M. Pazouki, Removal of nickel(II) from aqueous solutions by using nano-crystalline calcium hydroxyapatite, J. Saudi Chem. Soc., 15 (2011) 105–112.
  19. T. Motsi, N.A. Rowson, M.J.H. Simmons, Adsorption of heavy metals from acid mine drainage by natural zeolite, Int. J. Miner. Process., 92 (2009) 42–48.
  20. A.A. Shyaa, O.A. Hasan, A.M. Abbas, Synthesis and characterization of polyaniline/zeolite nanocomposite for the removal of chromium(VI) from aqueous solution, J. Saudi Chem. Soc., 19 (2015) 101–107.
  21. W.A. Khanday, S.K. Singh, J. Bhaudoriya, S.A. Majid, S.S. Tomar, R. Tomar, Study of sorption of Pb2+, Cd2+, Zn2+, and Cu2+ from wastewater on synthetic analogues of clintonite, Colloid J., 74 (2012) 573–581.
  22. P. Gupta, W.A. Khanday, S.A. Majid, V. Kushwa, S.S. Tomar, R. Tomar, Study of sorption of metal oxoanions from waste water on surfactant modified analog of laumontite, J. Environ. Chem. Eng., 1 (2013) 510–515.
  23. J. Sun, Y. Chen, H. Yu, L. Yan, B. Du, Z. Pei, Removal of Cu2+, Cd2+ and Pb2+ from aqueous solutions by magnetic alginate microsphere based on Fe3O4/MgAl-layered double hydroxide, J. Colloid Interface Sci., 532 (2018) 474–484.
  24. Y. Zhou, S. Fu, L. Zhang, H. Zhan, M.V. Levit, Use of carboxylated cellulose nanofibrils-filled magnetic chitosan hydrogel beads as adsorbents for Pb(II), Carbohydr. Polym., 101 (2014) 75–82.
  25. Z.S. Pour, M. Ghaemy, Removal of dyes and heavy metal ions from water by magnetic hydrogel beads based on poly(vinyl alcohol)/carboxymethyl starch-g-poly (vinyl imidazole), RSC Adv., 5 (2015) 64106–64118.
  26. D.W. Cho, B.H. Jeon, Y. Jeong, I.H. Nam, U.K. Choi, R. Kumar, H. Song, Synthesis of hydrous zirconium oxide-impregnated chitosan beads and their application for removal of fluoride and lead, Appl. Surf. Sci., 372 (2016) 13–19.
  27. L. Zeng, Y. Chen, Q. Zhang, X. Guo, Y. Peng, H. Xiao, X. Chen, J. Luo, Adsorption of Cd(II), Cu(II) and Ni(II) ions by crosslinking chitosan/rectorite nano-hybrid composite microspheres, Carbohydr. Polym., 130 (2015) 333–343.
  28. Y.Y. Wang, W.B. Yao, Q.W. Wang, Z.H. Yang, L.F. Liang, L.Y. Chai, Synthesis of phosphate-embedded calcium alginate beads for Pb(II) and Cd(II) sorption and immobilization in aqueous solutions, Trans. Nonferrous Met. Soc. China, 26 (2016) 2230–2237.
  29. Y. Feng, Y. Wang, Y. Wang, S. Liu, J. Jiang, C. Cao, J. Yao, Simple fabrication of easy handling millimeter-sized porous attapulgite/polymer beads for heavy metal removal, J. Colloid Interface Sci., 502 (2017) 52–58.
  30. J. Liu, C. Hu, Q. Huang, Adsorption of Cu2+, Pb2+, and Cd2+ onto oiltea shell from water, Bioresour. Technol., 271 (2019) 487–491.
  31. W.A. Khanday, S.A. Majid, S.C. Shekar, R. Tomar, Synthesis and characterization of various zeolites and study of dynamic adsorption of dimethyl methyl phosphate over them, Mater. Res. Bull., 48 (2013) 4679–4686.
  32. W.A. Khanday, Dynamic cum batch adsorption of a vesicant CWA (2-chloroethyl ethyl sulfide) over synthetic erionite, Microporous Mesoporous Mater., 244 (2017) 15–20.
  33. I. Langmuir, The adsorption of gases on plane surfaces of glass, mica and platinum, J. Am. Chem. Soc., 40 (1918) 1361–1403.
  34. H. Freundlich, Uber die adsorption in losungen, Z. Phys. Chem., 57 (1906) 385–470.
  35. V.O. Njoku, M.A. Islam, M. Asif, B.H. Hameed, Preparation of mesoporous activated carbon from coconut frond for the adsorption of carbofuran insecticide, J. Anal. Appl. Pyrolysis, 110 (2014) 172–180.
  36. L. Shen, J. Wang, Z. Li, L. Fan, R. Chen, X. Wu, J. Li, W. Zeng, A high-efficiency Fe2O3@microalgae composite for heavy metal removal from aqueous solution, J. Water Process Eng., 33 (2020) 101026, doi: 10.1016/j.jwpe.2019.101026.
  37. Q. Chen, Z. Tang, H. Li, M. Wu, Q. Zhao, B. Pan, An electronscale comparative study on the adsorption of six divalent heavy metal cations on MnFe2O4@CAC hybrid: experimental and DFT investigations, Chem. Eng. J., 381 (2020) 122656, doi: 10.1016/j.cej.2019.122656.