1.Afkhami, A., Saber-Tehrani, M., and Bagheri, H. 2010. Simultaneous removal of heavy-metal ions in wastewater samples usingnano-alumina modified with 2,4-dinitrophenylhydrazine.
J. Hazard. Mater. 181: 834-6.
2.Chen, H., Yan, T., and Jiang, F. 2014. Adsorption of Cr (VI) from aqueous solution on mesoporous carbon nitride. J. Taiwan Inst. Chem. Eng. 45: 1842-9.
3.Chen, H., Zhao, J., Dai, G., Wu, J., and Yan, H. 2010. Adsorption characteristics of Pb (II) from aqueous solution onto a natural biosorbent, fallen Cinnamomum camphora leaves. Desalination. 262: 1. 174-82.
4.Chen, Y.G., He, Y., Ye, W.M., and Jia, L.Y. 2015. Competitive adsorption characteristics of Na (I)/Cr (III) and Cu (II)/Cr (III) on GMZ bentonite in their binary solution. J. Ind. Engin. Chem. 26: 335-339.
5.Coelho, G.F., Gonçalves Jr, A.C., Tarley, C.R.T., Casarin, J., Nacke, H., and Francziskowski, M.A. 2014. Removal of metal ions Cd (II), Pb (II) and Cr (III) from water by the cashew nut shell Anacardium occidentale L. Ecol. Eng. 73: 514-25.
6.Eltantawy, I., and Arnold, P. 1973. Reappraisal of ethylene glycol mono-ethyl ether (EGME) method for surface area estimation of clays. J. Soil Sci. 24: 2. 232-238.
7.Escudero, C., Poch, J., and Villaescusa, I. 2013. Modelling of breakthrough curves of single and binary mixtures of Cu (II), Cd (II), Ni (II) and Pb (II) sorption onto grape stalks waste. Chem. Eng. J. 217: 129-38.
8.Fang, X., Fang, Z., Tsang, P., Cheng, W., Yan, X., and Zheng, L. 2014. Selective adsorption of Cr (VI) from aqueous solution by EDA- Fe3O4 nanoparticles prepared from steel pickling waste liquor. Appl. Surf. Sci. 314: 655-62.
9.Fu, X., Yang, H., Lu, G., Tu, Y., and Wu, J. 2015. Improved performance of surface functionalized TiO2/activated carbon for adsorption–photocatalytic reduction of Cr (VI) in aqueous solution. Mater. Sci. Semiconduct. Process. 39: 362-370.
10.Ge, H., and Ma, Z. 2015. Microwave preparation of triethylenetetramine modified graphene oxide/chitosan composite for adsorption of Cr (VI). Carbohyd. Polym. 131: 280-287.
11.Georgieva, V.G., Tavlieva, M.P., Genieva, S.D., and Vlaev, L. T. 2015. Adsorption kinetics of Cr (VI) ions from aqueous solutions onto black rice husk ash. J. Mol. Liq. 208: 219-226.
12.Gupta, S., and Bhattacharyya, K.G. 2008. Immobilization of Pb (II), Cd (II) and Ni (II)
ions on kaolinite and montmorillonite surfaces from aqueous medium. J. Environ. Manage. 87: 1. 46-58.
13.Hesse, P.R. 1971. A textbook of soil chemical analysis. CambridgeUniversity Press. 520p.
14.Ji, M., Su, X., Zhao, Y., Qi, W., Wang, Y., Chen, G., and Zhang, Z. 2015. Effective adsorption of Cr (VI) on mesoporous Fe-functionalized Akadama clay: Optimization, selectivity, and mechanism. Appl. Surf. Sci. 344: 128-136.
15.Lataye, D.H., Mishra, I.M., and Mall, I.D. 2006. Removal of pyridine from aqueous solution by adsorption on bagasse fly ash. Ind.Eng. Chem. Res. 45: 11. 3934-3943.
16.Li, L., Liu, F., Jing, X., Ling, P., and Li, A. 2011. Displacement mechanism of binary competitive adsorption for aqueous divalent metal ions onto a novel IDA-chelating resin: Isotherm and kinetic modeling. Water Res. 45: 3. 1177-88.
17.Lu, M., Guan, X.H., Xu, X.H., and Wei, D.Z. 2013. Characteristic and mechanism of Cr (VI) adsorption by ammonium sulfamate-bacterial cellulose in aqueous solutions. Chinese Chem. Lett. 24: 253-6.
18.Mahamadi, C., and Nharingo, T. 2010. Competitive adsorption of Pb2+ Cd2+ and Zn2+ ions onto Eichhornia crassipes in binary and ternary systems. Bioresource Technol. 101: 3. 859-64.
19.Mallakpour, S., and Moslemi, S. 2012. Dispersion of chiral amino acid organomodified Cloisite Na+ in poly (vinyl alcohol) matrix for designing of novel bionanocomposite films. Prog. Org. Coat. 74: 1. 8-13.
20.Niu, Y., Qu, R., Sun, C., Wang, C., Chen, H., and Ji, C. 2013. Adsorption of Pb (II)
from aqueous solution by silica-gel supported hyperbranched polyamidoamine dendrimers.
J. Hazard. Mater. 244: 276-86.
21.Pan, J., Jiang, J., and Xu, R. 2013. Adsorption of Cr (III) from acidic solutions by crop straw derived biochars. J. Environ. Sci. 25: 10. 1957-65.
22.Papageorgiou, S., Katsaros, F., Kouvelos, E., and Kanellopoulos, N. 2009. Prediction of binary adsorption isotherms of Cu2+, Cd2+ and Pb2+ on calcium alginate beads from single adsorption data. J. Hazard. Mater. 162: 2. 1347-54.
23.Rahmani, A., Zavvar Mousavi, H., and Fazli, M. 2010. Effect of nanostructure alumina on adsorption of heavy metals. Desalination. 253: 1. 94-100.
24.Siboni, S.,Samadi, T., Azizian,S.,Maleki, A., and Zarrabi, M. 2011.Removal of Chromium by Using of Adsorption onto Strong Base Anion Resin: Study of Equilibrium and Kinetic.
J. Water Wastewater. 3: 10-8. (In Persian)
25.Vieira Santos, A.C., and Masini, J. 2007. Evaluating the removal of Cd (II), Pb (II) and Cu (II) from a wastewater sample of a coating industry by adsorption onto vermiculite. Appl. Clay Sci. 37: 1. 167-74.
26.Wang, W., Zhou, J., Achari, G., Yu, J., and Cai, W. 2014. Cr (VI) removal from aqueous solutions by hydrothermal synthetic layered double hydroxides: Adsorption performance, coexisting anions and regeneration studies. Colloid Surf. 457: 33-40.
27.Zhang, Y.J., Ou, J.L., Duan, Z.K., Xing, Z.J., and Wang, Y. 2015. Adsorption of Cr (VI) on bamboo bark-based activated carbon in the absence and presence of humic acid. Colloids and Surf. A: Physicochem. Engin. Asp. 481: 108-116.