1. A.M. El-Kamash, Evaluation of zeolite A for the sorptive removal of Cs+ and Sr2+ ions from aqueous solutions using batch and fixed bed column operations, J. Hazard. Mater., 151 (2008) 432–445.
  2. H. Faghihian, M. Iravani, M. Moayed, M. Ghannadi-Maragheh, Preparation of a novel PAN-zeolite nano composite for removal of Cs+ and Sr2+ from aqueous solutions: Kinetic, equilibrium, and thermodynamic studies, Chem. Eng. J., 222 (2013) 41–48.
  3. E.I. Kurbatova, A.I. Ksenofontov, A.M. Dmitriyev, J.L. Regens, Irradiation of sorbents by ions of polymorphic metals for modeling 90 strontium sedimentation, Environ. Sci. Pollut. Res. Interna., 14 (2007) 251–255.
  4. M.L. Dietz, J.A. Dzielawa, Ion-exchange as a mode of cation transfer into room-temperature ionic liquids containing crown ethers: implications for the ‘greenness’ of ionic liquids as diluents in liquid liquid extraction, Chem. Commun., 20 (2001) 2124–2125.
  5. N.M. Kocherginsky, Y.K. Zhang, J.W. Stucki, D2EHPA based strontium removal from strongly alkaline nuclear waste, Desalination, 144 (2002) 267–272.
  6. S. Chegrouche, A. Mellah, M. Barkat, Removal of strontium from aqueous solutions by adsorption onto activated carbon: kinetic and thermodynamic studies, Desalination, 235 (2009) 306–318.
  7. S. Mishra, N. Devi, Extraction of copper(II) from hydrochloric acid solution by Cyanex 921, Hydrometallurgy, 107 (2011) 29–33.
  8. H.H. Nejad, M. Kazemeini, Optimization of platinum extraction by trioctylphosphine oxide in the presence of alkaline-metal salts, Procedia Eng., 42 (2012) 1302–1312.
  9. K. Kidani, H. Imura, Solvent effect of ionic liquids on the distribution constant of 2-thenoyltrifluoroacetone and its nickel (II) and copper (II) chelates and the evaluation of the solvent properties based on the regular solution theory, Talanta, 83 (2010) 299–304.
  10. K. Sarangi, P.K. Parhi, E. Padhan, A.K. Palai, K.C. Nathsarma, K.H. Park, Separation of iron (III), copper(II) and zinc(II) from a mixed sulphate/chloride solution using TBP, LIX 84I and Cyanex 923, Sep. Purif. Technol., 55 (2007) 44–49.
  11. Z. Ren, W. Zhang, H. Meng, Y.M. Liu, Y. Dai, Extraction equilibria of copper (II) with D2EHPA in kerosene from aqueous solutions in acetate buffer media, J. Chem. Eng. Data., 52 (2007) 438–441.
  12. N.E. Belkhouche, M.A. Didi, D. Vellemin, Separation of nickel and copper by solvent extraction using di-2-ethylhexylphosphoric acid-based synergistic mixture, Solvent Extr. Ion Exc., 23 (2005) 677–693.
  13. J.F. Dozol, M. Dozol, R.M. Macias, Extraction of strontium and cesium by dicarbollides, crown ethers and functionalized calixarenes, J. Inclu. Phenom. Macrocyc. Chem., 38 (2000) 1–22.
  14. S. Vellaichamy, K. Palanivelu, Preconcentration and separation of copper, nickel and zinc in aqueous samples by flame atomic absorption spectrometry after column solid-phase extraction onto MWCNTs impregnated with D2EHPA-TOPO mixture, J. Hazard. Mater., 185 (2011) 1131–1139.
  15. N.A. Ochoa, C. Illanes, J. Marchese, C. Basualto, F. Valenzuela, Preparation and characterization of polymeric micro spheres for Cr(VI) extraction, Sep. Purif. Technol., 52 (2006) 39–45.
  16. F.J. Alguacil, M. Alonso, F. Lopez, A. Lopez-Delgado, Uphill permeation of Cr(VI) using Hostarex A327 as ionophore by membrane-solvent extraction processing, Chemosphere, 72 (2008) 684–689.
  17. A.W. Trochimczuk, N. Kabay, M. Arda, M. Streat, Stabilization of solvent impregnated resins (SIRs) by coating with water soluble polymers and chemical cross linking, React. Funct. Polym., 59 (2004) 1–7.
  18. N. Kabay, J.L. Cortina, T. Trochimczuk, M. Streat, Solvent-impregnated resins (SIRs) methods of preparation and their applications, React. Funct. Polym., 70 (2010) 484–496.
  19. S. Ozcan, A. Tor, M.E. Aydin, Removal of Cr(VI) from aqueous solution by polysulfone micro capsules containing Cyanex 923 as extraction reagent, Desalination, 259 (2010) 179–186.
  20. W.W. Yang, G.S. Luo, F.Y. Wu, F. Chen, X.C. Gong, Di-2-ethylhexyl phosphoric acid immobilization with polysulfone micro capsules, React. Funct. Polym., 61 (2004) 91–99.
  21. W.W. Yang, G.S. Luo, X.C. Gong, Extraction and separation of metal ions by a column packed with polystyrene micro capsules containing Aliquat 336, Separ. Purif. Technol., 43 (2005) 175–182.
  22. S. Nishihama, N. Sakaguchi, T. Hirai, I. Komasawa, Extraction and separation of rare earth metals using micro capsules containing bis(2-ethylhexyl)phosphinic acid, Hydrometallugy, 64 (2002) 35–42.
  23. Y. Zhang, D. Kogelnig, C. Morgenbesser, A. Stojanovic, F. Jirsa, I. Lichtscheidl-Schultz, R. Krachler, Y. Li, B.K. Keppler, Preparation and characterization of immobilized [A336] [MTBA] in PVA–alginate gel bead as novel solid-phase extractants for an efficient recovery of Hg (II) from aqueous solutions, J. Hazard. Mater., 196 (2011) 201–209.
  24. C.H. Lee, M.G. Lee, Enhanced adsorption of strontium(II) ion from aqueous solution using solid-phase extractant containing TTA and TOPO, Desal. Water Treat., 58 (2017) 413–419.
  25. M. Ciopec, C.M. Davidescu, A. Negrea, L. Lupa, P. Negrea, A. Popa, Di-2-Ethylhexyl phosphoric acid immobilization with polysulfone micro capsules for Cu(II) extraction, Chem. Bull. “Politehnica” Univ. (Timisoara), 56 (2011) 43–46.
  26. C. Davidescu, M. Ciopec, A. Negrea, A. Popa, L. Lupa, P. Negrea, C. Muntean, M. Motoc, Use of di-(2-thylhexyl) phosphoric acid (DEHPA) impregnated XAD7 copolymer resin for the removal of chromium (III) from water, Rev. Chim., 62 (2011) 712–717.
  27. K.K. Singh, S.K. Pathak, M. Kumar, A.K. Mahtele, S.C. Tripathi, P.N. Bajaj, Study of uranium sorption using D2EHPA-impregnated polymeric beads, J. Appl. Poly. Sci., 127 (2013) 410–419.
  28. A.B. Kanagare, K.K. Singh, M. Yadav, V.S. Shinde, M. Kumar, Synthesis of D2EHPA impregnated polymeric beads for the extraction of zinc from zinc-rich waste liquor, Current Appl. Poly. Sci., 1 (2017) 1–12.
  29. S.K. Kam, J.W. Jeon, M.G. Lee, Removal of Cu(II) and Pb(II) by solid-phase extractant prepared by immobilizing D2EHPA with polysulfone, J. Environ. Sci. Int., 23 (2014) 1843–1850.
  30. M. Ciopec, C. Davidescu, A. Negrea, L. Lupa, P. Negrea, A. Popa, C. Muntean, Use of D2EHPA-Impregnated XAD7 resin for the removal of Cd(II) and Zn(II) from aqueous solutions, Environ. Eng. Manage. J., 10 (2011) 1597–1608.
  31. S. Lagergren, About the theory of so-called adsorption of soluble substances, Kung. Sven. Veten. Hand., 24 (1898) 1–39.
  32. Y.S. Ho, G. McKay, Psuedo-second order model for sorption processes, Process Biochem., 34 (1999) 451–465.
  33. W.J. Weber, J.C. Morris, Equilibria and capacities for adsorption on carbon, J. Sanit. Eng. Div. Proc. Am. Soc. Civ. Eng., 90 (1964) 79–91.
  34. O. Hamdaoui, Batch study of liquid-phase adsorption of methylene blue using cedar sawdust and crushed brick, J. Hazard. Mater., 135 (2006) 264–273.
  35. H.M.F. Freundlich, Over the adsorption in solution, J. Phys. Chem., 57 (1906) 385–470.
  36. I. Langmuir, The constitution and fundamental properties of solids and liquids, J. Am. Chem. Soc., 38 (1916) 2221–2295.
  37. K.R. Hall, L.C. Eagleton, A. Acrivos, T. Vermeulen, Pore-and solid-diffusion kinetics in fixed-bed adsorption under constant-pattern conditions, I&EC Fundam., 5 (1996) 212–223.