Abstract
Adsorptive behavior of natural clinoptilolite was assessed for removal of thorium from aqueous solutions. Natural zeolite was characterized by X-ray diffraction and X-ray fluorescence. The zeolite sample composed mainly of clinoptilolite. Na-exchanged form of zeolite was prepared and its sorption capacity for removal of thorium from aqueous solutions was examined. The effects of relevant parameters, including initial concentration, contact time, solid to liquid ratio, temperature and initial pH on the removal efficiency were investigated in batch studies. The pH strongly influenced thorium adsorption capacity and maximal capacity was obtained at pH 4.0. Kinetics and isotherm of adsorption were also studied. The pseudo-first-order, pseudo-second-order, Elovich and intra-particle diffusion models were used to describe the kinetic data. The pseudo-second-order kinetic model provided excellent kinetic data fitting (R 2 > 0.999) with rate constant of 1.25, 1.37 and 1.44 g mmol−1 min−1 respectively for 25, 40 and 55 °C. The Langmuir and Freundlich models were applied to describe the equilibrium isotherms for thorium uptake and the Langmuir model agrees very well with experimental data. Thermodynamic parameters were determined and are discussed.
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Humeinicu D, Drochioiu G, Popa K (2004) J Radioanal Nucl Chem 260(2):291
Salinas-Pedroza MG, Olguin MT (2004) J Radioanal Nucl Chem 260(1):115
Osthols E, Manccan A, Farges F, Charlet L (1997) J Colloid Interface Sci 194:10
Metaxas M, Kasselouri-Rigopoulou V, Galiatsatou P, Konstantopolou C, Oikonomou D (2003) J Hazard Mater B97:71
Malekpour A, Millani MR, Kheirkhah M (2008) Desalination 225:199
Breck DW (1974) Zeolite molecular sieves, structure, chemistry and use. Wiley, New York
Barrer RM (1978) Zeolites and clay minerals as sorbents and molecular sieves. Academic Press, London
Dyer A (1988) Zeolite molecular sieves. Wiley, Chichester
Meier WM, Olson DH (1992) Atlas of zeolite structure types. Butterworth-Heinemann, London
Gottardi G, Gali E (1985) Natural zeolites. Springer, Berlin
Tsitsishvili GV, Andronikashvili TG, Kirov GN, Filizova LD (1992) Natural zeolites. Ellis Horwood, Chichester
Tschernich R (1992) Zeolites of the world. Geoscience Press, Phoenix
Mumpton FA (1975) In Mumpton FA (ed) Mineralogy and geology of natural zeolites. MSA Short Course Notes, vol 4, p 117
Mumpton FA (1987) In: Sand LB, Mumpton FA (eds) Natural zeolites. Pergamon, Oxford, p 3
Dyer A (1984) Chem Ind 2:241
Griffiths J (1987) Ind Miner 232:19
Haggerty GM, Bowman RS (1994) Environ Sci Technol 28:452
Faghihian H, Kabiri-Tadi M, Ahmadi SJ (2010) J Radioanal Nucl Chem 285:499
Rozmaric M, Gojmerac Ivsic A, Grahek Z (2009) Talanta 80:352
Tashauoei HR, Movahedian A, Amin MM, Kamali M, Nikaeen M (2010) Int J Environ Sci Tech 7(3):497
Bundschuh T, Knopp R, Muller R, Kim JI, Neck V, Fanghannel T (2000) Radiochim Acta 88(9–11):625
Ekberg C, Albinsson Y, Comarmond MJ, Brown PL (2000) J Solut Chem 29(1):63
Engkvist I, Albinsson Y (1992) Radiochim Acta 58/59:109
Grenthe I, Lagerman B (1991) Acta Chem Scand 45(3):231
Neck V, Kim JI (2001) Radiochim Acta 89(1):1
Misaelides P, Godelitsas A, Filippidis A, Charistos D, Anousis I (1995) Sci Total Environ 173/174:237
Acknowledgments
The authors wish to thank the Office of Graduate Studies of the University of Isfahan for their support. The authors thank Mrs. M. Akbari for his help in the XRD and XRF analysis in Central Laboratory of University of Isfahan, and Mr. R. Sayyari for help in the ICP analysis.
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Khazaei, Y., Faghihian, H. & Kamali, M. Removal of thorium from aqueous solutions by sodium clinoptilolite. J Radioanal Nucl Chem 289, 529–536 (2011). https://doi.org/10.1007/s10967-011-1100-4
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DOI: https://doi.org/10.1007/s10967-011-1100-4