Journal of Biological Sciences1727-30481812-5719Asian Network for Scientific Information10.3923/jbs.2007.222.230Imperata cylindrica) Leaf Powder]]>Megat HanafiahM. A.K.Wan NgahW.S. ZakariaH. IbrahimS.C. 2200772A batch adsorption method was applied to study the adsorption of Pb2+ ions from aqueous solution by lalang or Imperata cylindrica (IC) leaf powder. Effect of initial lead concentration, contact time, pH of solution, temperature and adsorbent dose were also investigated. A strong dependence of adsorption capacity on pH was observed as the capacity increased with increasing pH. Adsorption equilibrium was established in about 120 min. Adsorption of lead was found to increase with increasing temperature indicating endothermic nature of adsorption. The kinetic data were analyzed using various kinetic models particularly pseudo-first-order, pseudo-second-order, Ritchie`s-second-order, Elovich and intraparticle diffusion equations. Results show that the pseudo-second order kinetic model was found to agree well with the experimental data. Equilibrium isotherm data were tested using three models-Langmuir, Freundlich and Temkin. Equilibrium data agreed well with Langmuir model. The maximum adsorption capacity of lead by IC leaf powder determined from Langmuir model was 5.89 mg g-1 at pH 4.]]>Archana, A., K.K. Sahu and B.D. Pandey,2005281291298Aharoni, C. and M. Ungarish,197773456464Aksu, Z.,2005409971026Bektas, N. and S. Kara,200439189200Bhattacharyya, K.G. and S.S. Gupta,2006277191200Botkin, D.B. and E.A. Keller,20003rd Edn.,pp: 286pp: 286Brady, D. and J.R. Duncan,1994Saccharomyces cerevisiae.]]>41149154Chien, S.H. and W.R. Clayton,198044265268Donat, R., A. Akdogan, E. Erdem and H. Cetisli,20052+ and Ni2+ adsorption onto natural bentonite from aqueous solutions.]]>2864352Dursun, A.Y.,2006Aspergillus niger.]]>28187195Erdem, M. and A. Ozverdi,200542259264Feng, Q., Q. Lin, F. Gong, S. Sugita and M. Shoya,200427818Freundlich, H.M.F.,190657385470Gupta, V.K. and I. Ali,2004271321328Hanafiah, M.A.K.M., S. Shafiei, M.K. Harun and M.Z.A. Yahya,20062+ adsorption onto rubber tree (Hevea brasiliensis) leaf powder.]]>517217221Hanafiah, M.A.K.M., W.S.W. Ngah, S.C. Ibrahim, H. Zakaria and W.A.H.W. Ilias,2006Hevea brasiliensis) leaf powder.]]>627622767Ho, Y.S.,19951995Ho, Y.S. and G. McKay,199876332340Ho, Y.S. and G. McKay,20033310471061Holm, L.G., D.L. Plucknett, J.V. Pancho and J.P. Herberger,19771st Edn.,Horsfall, Jr. M. and A.A. Abia,2003Manihot sculenta Cranz).]]>3749134923Iqbal, M. and R.G.J. Edyvean,2004Phanerochaete chrysosporium.]]>17217223Keskinkan, O., M.Z.L. Goksu, A. Yuceer, M. Basibuyuk and C.F. Forster,2003Myriophyllum spicatum).]]>39179183Keskinkan, O., M.Z.L. Goksu, M. Basibuyuk and C.F. Forster,2004Ceratophyllum demersum).]]>92197200Kikuchi, Y., Q. Qian, M. Machida and H. Tatsumoto,200644195202Langmuir, I.,19163822212295Li, Y.H., Z. Di, J. Ding, D. Wu, Z. Luan and Y. Zhu,20052+ on carbon nanotubes.]]>39605609Liu, Y., X. Chang, Y. Guo and S. Meng,2006135389394Low, K.S., C.K. Lee and S.C. Liew,2000365964Matheickal, J.T. and Q. Yu,1997Phellinus badius.]]>10947957Meunier, N., J.F. Blais and R.D. Tyagi,2002671930Meunier, N., J. Laroulandie, J.F. Balis and R.D. Tyagi,200390255263Mohanty, K., M. Jha, B.C. Meikap and M.N. Biswas,2006Eichhornia crassipes.]]>1177177Mouflih, M., A. Aklil and S. Sebti,2005B119183188Ngah, W.S.W., S.A. Ghani and L.L. Hoon,200249625628Qi, L. and Z. Xu,2004251183190Quek, S.Y., D.A.J. Wase and C.F. Forster,199824251256Rithcie, A.G.,19777316501653Sag, Y. and T. Kutsal, 1995Zoogloea ramigera: Use of adsorption isotherms and a comparison of biosorption characteristics.]]>60181188Saiano, F., M. Ciofalo, S.O. Cacciola and S. Ramirez,2005Phomopsis sp. Biomaterial in laboratory experiments and real wastewater treatments.]]>3922732280Sekar, M., V. Sakthi and S. Rengaraj,2004279307313Shukla, A., Y.H. Zhang, P. Dubey, J.L. Margrave and S.S. Shukla,200295137152Southichak, B., K. Nakano, M. Nomura, N. Chiba and O. Nishimura,2006Phragmites australis: A novel biosorbent for the removal of heavy metals from aqueous solution.]]>4022952302Taty-Costodes, V.C., H. Fauduet, C. Porte and Y.S. Ho,2005Pinus sylvestris sawdust: Adsorption on a fixed-bed column.]]>123135144Temkin, M.I. and V. Pyzhev,194012327356Tunali, S., A. Cabuk and T. Akar,2006115203211Volesky, B., 1990pp: 429pp: 429Weber, W.J. and J.C. Morris,1963893160Yu, B., Y. Zhang, A. Shukla, S.S. Shukla and K.L. Dorris, 2001B848394