K. Furukawa, K. Arakawa, A road map for the realization of global-scale thorium breeding fuel cycle by single molten-fluoride flow, Energy Conv. and Manag. 49 (2008) 1832-1848.
 M.S. Wickleder, B. Fourest P.K. Dorhout, The Chemistry of the Actinide and Transactinide Elements, 4th edition, Springer, Vol. 1 (2010) 52-55.
 K.C. Bhainsa, S.F. D’Souza, Thorium biosorption by Aspergillus fumigatus, a filamentous fungal biomass, J. Hazard. Mat.165 (2009) 670-676.
 B. Volesky, Sorption and Biosorption, BV-Sorbex, Inc., Canada, (2003).
 H.F. Walton, R.D. Rocklin, Ion Exchange in Analytical Chemistry, CRC Press, Boca Raton, FL, (1990).
 R. Keim, Gmelin Handbook of Inorganic Chemistry, Uranium Supplement, Cation-Exchange and Chromatography, Springer-Verlag, Berlin, (1993).
 N. Demirel, M. Merdivan, Thorium (IV) and uranium (VI) sorption studies on octacarboxymethyl–C–methyl calixresorcinarene impregnated on a polymeric support, Analytica Chimica Acta 485 (2003) 213-219.
 Z. Talip, M. Eral, U. Hicsonmez, Adsorption of thorium from aqueous solutions by perlite, J. Environ. Radio. 10 (2009) 139-143.
 M. Metaxas, V. Kasselouri-Rigopoulou, P. Galiatsatou, C. Konstantopoulou, D. Oikonomou, Thorium removal by different adsorbents, J. Hazard. Mat. 97 (2003) 71-82.
 A. Dyer, L.C. Jozefowicz, The removal of thorium from aqueous solutions using zeolites, J. Radio. Nucl. Chem. 159 (1992) 47-62.
 U. Kumar, Agricultural products and by-products as a low cost adsorbent for heavy metal removal from water and wastewater: A review, Scient. Res.and Essay 1 (2006) 33-37.
 F. Fu, Q. Wang, Removal of heavy metal ions from wastewaters: A review, J. Environ. Manag. 92 (2011) 407-418.
 M. Ghasemian, A.R. Keshtkar, R. Dabbagh, S.J. Safdari, Biosorption of uranium (VI) from aqueous solutions by Ca-pretreated Cystoseira indica alga: Breakthrough curves studies and modeling, J. Hazard. Mat. 189 (2011) 141-149.
 D. Lu, Q. Cao, X. Li, X. Cao, F. Luo, W. Shao, Kinetics and equilibrium of Cu (II) adsorption onto chemically modified orange peel cellulose biosorbents, Hydrometallurgy 95 (2009) 145-152.
 S. Schiewer, M. Iqbal, The role of pectin in Cd binding by orange peel biosorbents: A comparison of peels, depectinated peels and pectin acid, J. Hazard. Mat. 177 (2010) 899-907.
 A. Chatterjee, S. Schiewer, Biosorption of Cadmium (II) Ions by Citrus Peels in a Packed Bed Column: Effect of Process Parameters and Comparison of Different Breakthrough Curve Models', Clean-Soil Air Water 39 (2011) 874-881.
 A.B. Perez Marin, M.I. Aguilar, V.F. Meseguer, J.F. Ortuno, J. Saez, M. Llorens, Biosorption of chromium (III) by orange (Citrus Sinensis) waste: Batch and continuous studies, Chem. Eng. J. 155 (2009) 199-206.
 A. Movafaghpour, Kinetic and isotherm studies for biosorption of Thorium on orange peel, Tehran University, M.SC. Thesis (2013).
 E. Malkoc, Y. Nuhoglu, Removal of Ni (II) ions from aqueous solutions using waste of tea factory: Adsorption on a fixed-bed column, J. of Hazard. Mat. 135 (2006) 328-336.
 M. R. Lasheen, N. S. Ammar, H. S. Ibrahim, Adsorption/desorption of Cd (II), Cu (II) and Pb(II) using chemically modified orange peel: Equilibrium and kinetic studies, Solid State Sciences 14 (2012) 202-210.
 Thomas, H. C., Heterogeneous ion exchange in following system, J. Am. Chem. Sec. 66 (1994) 1646-1664.
 Z. Aksu, F. Gonen, Biosorption of phenol by immobilized activated sludge in a continuous packed bed: prediction of breakthrough curves, Process Bioch. 39 (2004) 599-613.
 R. Gnanasambandam, A. Proctor, Determination of pectin degree of esterification by diffuse reflectance Fourier transform infrared spectroscopy, Food Chem. 68 (2000) 327–332.