1- Rostami, K., and Joodaki, M.R. (2002). “Some studies of cadmium adsorption using Aspergillus niger, Penicillium austurianum, employing an airlift fermenter.” J. of Chemical Engineering, 89(1-3), 239-252.
2- Ahluwalia, S.S., and Goyal, D. (2007). “Microbial and plant derived biomass for removal of heavy metals from wastewater.” J. of Bioresource Technology, 98(12), 2243-2257.
3- Amini, M., Younesi, H., Bahramifar, N., Lorestani, A.A.Z., Ghorbani, F., Daneshi, A., and Sharifzadeh, M. (2008). “Application of response surface methodology for optimization of lead biosorption in an aqueous solution by Aspergillus niger.” J. of Hazardous Materials, 154(1-3), 694-702.
4- Kumar, U., and Bandyopadhyay, M. (2006). “Sorption of cadmium from aqueous solution using pretreated rice husk.” J. of Bioresource Technology, 97(1), 104-109.
5- Yunus Pamukoglu, M., and Kargi, F. (2006). “Removal of copper(II) ions from aqueous medium by biosorption onto powdered waste sludge.” J. of Process Biochemistry, 41(5), 1047-1054.
6- Zhou, D., Zhang, L., Zhou, J., and Guo, S. (2004). “Cellulose/chitin beads for adsorption of heavy metals in aqueous solution.” J. of Water Research, 38(11), 2643-2650.
7- Ghorbani, F., and Younesi, H. (2008). “Biosorption of cadmium(II) Ions by Saccharomyces cerevisiae Biomass from Aqueous Solutions.” J. of Water and Wastewater, 68, 33-39. (In Persian)
8- Naddafi, K., Nabizadeh, R., Saeedi, R., Mahvi, A.H., Vaezi, F., Yaghmaeian, K., Ghasri, A., and Nazmara, Sh. (2007). “Biosorption of lead(II) and cadmium(II) by protonated Sargassum glaucescens biomass in a continuous packed bed column.” J. of Hazardous Materials, 147(3), 785-791.
9- Kobya, M., Demirbas, E., Senturk, E., and Ince, M. (2005). “Adsorption of heavy metal ions from aqueous solutions by activated carbon prepared from apricot stone.” J. of Bioresource Technology, 96(13), 1518-1521.
10- Pamukoglu, M.Y., and Kargi, F. (2006). “Batch kinetics and isotherms for biosorption of copper(II) ions onto pre-treated powdered waste sludge (PWS).” J. of Hazardous Materials, 138(3), 479-484.
11- Amini, M., Younesi, H., and Bahramifar, N. (2009). “Statistical modeling and optimization of the cadmium biosorption process in an aqueous solution using Aspergillus niger.” J. of Colloids and Surfaces A: Physicochemical and Engineering Aspects, 337(1-3), 67-73.
12- Wang, L., Meng, C.G., Han, M., and Ma, W. (2008). “Lithium uptake in fixed-pH solution by ion sieves.” J. of Colloid and Interface Science, 325(1), 31-40.
13- Krajewska, B. (2004). “Application of chitin- and chitosan-based materials for enzyme immobilizations: A review.” J. of Enzyme and Microbial Technology, 35(2-3), 126-139.
14- Wan Ngah, W.S., Endud, C.S., and Mayanar, R. (2002). “Removal of copper(II) ions from aqueous solution onto chitosan and cross-linked chitosan beads.” J. of Reactive and Functional Polymers, 50(2), 181-190.
15- Qi, L., and Xu, Z. (2004). “Lead sorption from aqueous solutions on chitosan nanoparticles.” J. of Colloids and Surfaces A: Physicochemical and Engineering Aspects, 251(1-3), 183-190.
16- Pillai, C.K.S., Paul, W., and Sharma, C.P. (2009). “Chitin and chitosan polymers: Chemistry, solubility and fiber formation.” J. of Progress in Polymer Science, 34(7), 641-678.
17- Janes, K.A., Fresneau, M.P., Marazuela, A., Fabra, A., and Alonso, M.J. (2001). “Chitosan nanoparticles as delivery systems for doxorubicin.” J. of Controlled Release, 73(2-3), 255-267.
18- Guibal, E., Saucedo, I., Roussy, J., and Le Cloirec, P. (1994). “Uptake of uranyl ions by new sorbing polymers: Discussion of adsorption isotherms and pH effect.” J. of Reactive Polymers, 23(2-3), 147-156.
19- Becker, T., Schlaak, M., and Strasdeit, H. (2000). “Adsorption of nickel(II), zinc(II) and cadmium(II) by new chitosan derivatives.” J. of Reactive and Functional Polymers, 44(3), 289-298.
20- Jansson-Charrier, M., Guibal, E., Roussy, J., Delanghe, B., and Le Cloirec, P. (1996). “Vanadium (IV) sorption by chitosan: Kinetics and equilibrium.” J. of Water Research, 30(2), 465-475.
21- Kyzas, G.Z., Kostoglou, M., and Lazaridis, N.K. (2009). “Copper and chromium(VI) removal by chitosan derivatives-Equilibrium and kinetic studies.” J. of Chemical Engineering, 152(2-3), 440-448.
22- Vasconcelos, H.L., Camargo, T.P., Gonçalves, N.S., Neves, A., Laranjeira, M.C.M., and Favere, V.T. (2008). “Chitosan crosslinked with a metal complexing agent: Synthesis, characterization and copper(II) ions adsorption.” J. of Reactive and Functional Polymers, 68(2), 572-579.
23- Kawamura, Y., Mitsuhashi, M., Tanibe, H., and Yoshida, H. (1993). “Adsorption of metal ions on polyaminated highly porous chitosan chelating resin.” J. of Industrial and Engineering Chemistry Research, 32(2), 386-391.
24- Nagib, S., Inoue, K., Yamaguchi, T., and Tamaru, T. (1999). “Recovery of Ni from a large excess of Al generated from spent hydrodesulfurization catalyst using picolylamine type chelating resin and complexane types of chemically modified chitosan.” J. of Hydrometallurgy, 51(1), 73-85.
25- Bodnar, M., Hartmann, J.F., and Borbely, J. (2005). “Preparation and characterization of chitosan-based nanoparticles.” J. of Biomacromolecules, 6(5), 2521-2527.
26- De Moura, M.R., Aouada, F.A., and Mattoso, L.H.C. (2008) “Preparation of chitosan nanoparticles using methacrylic acid.” J. of Colloid and Interface Science, 321(2), 477-483.
27- Chen, A.H., Liu, S.C., Chen, C.Y., and Chen, C.Y. (2008). “Comparative adsorption of Cu(II), Zn(II), and Pb(II) ions in aqueous solution on the crosslinked chitosan with epichlorohydrin.” J. of Hazardous Materials, 154(1-3), 184-191.
28- Ramesh, A., Hasegawa, H., Sugimoto, W., Maki, T., and Ueda, K. (2008). “Adsorption of gold(III), platinum(IV) and palladium(II) onto glycine modified crosslinked chitosan resin.” J. of Bioresource Technology, 99(9), 3801-3809.
29- Rozada, F., Otero, M., García, A.I., and Morán, A. (2007). “Application in fixed-bed systems of adsorbents obtained from sewage sludge and discarded tyres.” J. of Dyes and Pigments, 72(1), 47-56.
30- Sreejalekshmi, K.G., Krishnan, K.A., and Anirudhan, T.S. (2009). “Adsorption of Pb(II) and Pb(II)-citric acid on sawdust activated carbon: Kinetic and equilibrium isotherm studies.” J. of Hazardous Materials, 161(2-3), 1506-1513.
31- Chu, K.H. (2002). “Removal of copper from aqueous solution by chitosan in prawn shell: Adsorption equilibrium and kinetics.” J. of Hazardous Materials, 90(1), 77-95.
32- Crist, R.H., Oberholser, K., Shank, N., and Ming, N. (1981). “Nature of bonding between metallic ions and algal cell walls.” J. of Environmental Science and Technology, 15(10), 1212-1217.
33- Vasconcelos, H.L., Camargo, T.P., Gonçalves, N.S., Neves, A., Laranjeira, M.C.M., and Fávere, V.T. (2008). “Chitosan crosslinked with a metal complexing agent: Synthesis, characterization and copper(II) ions adsorption.” J. of Reactive and Functional Polymers, 68(2), 572-579.
34- Copello, G.J., Varela, F., Vivot, R.M., and Díaz, L.E. (2008). “Immobilized chitosan as biosorbent for the removal of Cd(II), Cr(III) and Cr(VI) from aqueous solutions.” J. of Bioresource Technology, 99(14),6538-6544.
35- Özacar, M., and Sengil, I.A. (2005). “Adsorption of metal complex dyes from aqueous solutions by pine sawdust.” J. of Bioresource Technology, 96(7), 791-795.
36- Rawajfih, Z., and Nsour, N. (2008). “Thermodynamic analysis of sorption isotherms of chromium(VI) anionic species on reed biomass.” J. of Chemical Thermodynamics, 40(5), 846-851.
37- Shukla, A., Zhang, Y.H., Dubey, P., Margrave, J.L., and Shukla, S.S. (2002). “The role of sawdust in the removal of unwanted materials from water.” J. of Hazardous Materials, 95(1-2), 137-152.
38- Sun, X., Peng, B., Ji, Y., Chen, J., and Li, D. (2009). “Chitosan(chitin)/cellulose composite biosorbents prepared using ionic liquid for heavy metal ions adsorption.” J. of AIChE, 55(8), 2062-2069.
39- SarI, A., Tuzen, M., Uluِzlü, Ö.D., and Soylak, M. (2007). “Biosorption of Pb(II) and Ni(II) from aqueous solution by lichen (Cladonia furcata) biomass.” J. of Biochemical Engineering, 37(2), 151-158.
40- Swayampakula, K., Boddu, V.M., Nadavala, S.K., and Abburi, K. (2009). “Competitive adsorption of CuII), Co(II) and Ni(II) from their binary and tertiary aqueous solutions using chitosan-coated perlite beads as biosorbent.” J. of Hazardous Materials, 170(2-3), 680-689.
41- Heidari, A., Younesi, H., and Mehraban, Z. (2009). “Removal of Cd(II), Ni(II), and Pb(II) ions in an aqueous solution by chemically modified nanoporous MCM-41.” J. of Water and Wastewater, 73, 25-33. (In Persian)