Kainejad, M., and Ebrahimi, S. (2004). Environmental engineering. 2nd Ed., Sahand University Pub., Tabriz. Drizo, A., Frost, C. A., Grace, J., and Smith, K. A. (1999). Physico-chemical screening of phosphate-removing substrates for use in constructed wetland systems. Water Research. 33, 3595-3602 Nowack, B., and Stone, A. (2006). Competitive adsorption of phosphate and phosphonates onto goethite. Water Research. 40, 2201-2209 Ozacar, M. (2003). Equilibrium kinetic modeling of adsorption of phosphorous on calcined alunite. Adsorption. 9, 125-132 Drizo, A., Forget, C., Chapuis, R. P., and Comeau, Y. (2006). Phosphorus removal by electric arc furnace steel slag and serpentinite. Water Research. 40, 1547-1554 Bellier, N., Chazarenc, F., and Comeau, Y. (2006). Phosphorus removal from wastewater by mineral apatite. Water Research. 40, 2965-2971 Ozacarand, M. (2003). Equilibrium kinetic modeling of adsorption of phosphorous on calcined alunite. Adsorption. 9, 125-132 Kermani, M., Bina, B., Movahedian, H., Amin, M. M., and Nikaeen, M. (2010). Performance and modeling of moving bed biofilm process for nutrient removal from wastewater. J. of Water and Wastewater. 3, 9-19 Tchobanoglous, G., Burton, F., and Stensel, D. (2003). Wastewater engineering, treatment and reuse. 4th Ed., McGraw-Hill, New York. Lu, G., Qiang., B., and Dan, S. (2008). Mechanisms of phosphate removal from aqueous solution by blast furnace slag and steel furnace slag. J. Zhejiang Univ. Sci A. 9, 125-132 Johansson, L., and Gustafsson, J. (2000). Phosphate removal using blast furnace slags and opoka-Mechanisms. Water Research. 34, 259-265 Sheng, G., Shi, Q., and Hong, D. (2008). Mechanisms of phosphate removal from aqueous solution by blast furnace slag and steel furnace slag. J. Zhejiang Univ. Sci. A. 9 (1), 125-132 Xu, K., Deng, T., Liu, J., and Peng, W. (2010). Study on the phosphate removal from aqueous solution using modified fly ash. Fuel. 89 (12), 3668-3674 Jiang, Z., Han, J., and Liu, X. (2011). Behavior of phosphorus adsorption from aqueous solutions on modified activated alumina. Advanced Materials Research. 152 (153), 945-949 APHA, AWWA, and WEF. (1998). Standard method for examination of water and wastewater. 20th Ed., American Public Health Association Publication, Washington DC.. Cucarella, V., Renman, G., and Qual., J.E. (2009). Cucarella, V., Renman, G., and Qual., J.E.. J. Environ. Qual.. 38, 381-392 Bowman, R., Sullivan., E., and Li, Z. (2006). Uptake of cations, anions and nonpolar organic molecules by surfactant-modified clinoptilolite-rich tuff. Colella, C., and Mumpton F.A. (Eds), Natural zeolites for the third millennium. Liu, C., Li, Y. -Z., Luan, Z. -K., Chen, Z. -Y., Zhang, Z. -G., and Jia, Z. -P. (2007). Adsorption removal of phosphate from aqueous solution by active red mud. J. of Environmental Sciences. 19, 1166-1170 Chi, N., Dong, B., and Liao, Y. (2010). Advanced phosphate removal by adsorption onto activated alum porcelain in simulation water. Coll. of Environ. Sci. and Eng.. 18, 1-4 Zhang, G. and Xu, J. (2011). Competitive adsorption of fluoride and phosphate on mgal-co3 layered double layer. Advanced Materials Research. 160 (162), 182-188 Krishnan, K., and Haridas, A. (2008). Removal of phosphate from aqueous solutions and sewage using natural and surface modified coir pith. J. of Hazardous Materials. 152, 527-535 Prochaska, C., and Zouboulis, A. (2006). Removal of phosphates by pilot vertical-flow constructed wetlands using a mixture of sand and dolomite as substrate. Ecological Engineering. 26, 293-303 Hameed, B.H. (2009). Evaluation of papaya seeds as a novel non-conventional low-cost adsorbent for removal of methylene blue. J. Hazard. Mater.. 162, 939-944 Altin, O., HO, O., and Dogu, T. (1998). Use of general purpose adsorption isotherms for heavy metal clay mineral interactions. J. of Colloid and Interface Science. 198, 130-140 Freundlich, H.M.F. (1906). Uber die adsorption in losungen. J. Phys. Chem. 57 (A), 385-470 Langmuir, I. (1916). The constitution and fundamental properties of solids and liquids. J. An. Chem. Soc.. 38, 2221-2295 Nemr, A.E. (2009). Potential of pomegranate husk carbon for Cr(VI) removal from wastewater: Kinetic and isotherm studies. J. of Hazardous Materials. 161, 132-141 Temkin, M., and Pyzhev, J.A.V. (1940). Kinetics of ammonia synthesis on promoted Iron catalysts. Acta Physiochem. 12, 217-229 Brunauer, S., Emmet, P.H., and Teller, E. (1938). Adsorption of gases in multimolecular layers. J. Am. Chem. Soc.. 60, 309-319 Fan, X., Parker., D.J. and Smith, M.D. (2003). Adsorption kinetics of fluoride on low cost materials. Water Research. 37, 4929-4937 Shams Khorramabadi, Gh., Darvishi Cheshmeh Soltani, R., and Jorfi, S. (2010). Cd(II) adsorption using waste sludge from a municiap wastewater treatment system. J. of Water and Wastewater. 1, 57-62 Azizian, S. (2004). Kinetic models of sorption: A theoritical analysis. Colloid and Interface Sci. 726, 47-52