Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2008.2163.2167Gracilaria salicornia and Sargassum sp. For the Biosorption of Cr (VI) from Aqueous Solutions]]>KhorramabadiGh. Shams SoltaniR. Darvishi Cheshmeh 112008811In this study, the adsorption properties of two different marine algae (Gracilaria salicornia (red algae) and Sargassum sp. (brown algae) were investigated. Equilibrium isotherms were studied to evaluate the relative ability of the two algae to sequester Cr (VI) from aqueous solutions. The maximum biosorption capacity obtained was 45.959 mg g-1 for G. salicornia and 33.258 mg g-1 for Sargassum sp. at a solution pH of 4 and 50 mg L-1 initial chromium concentration. A significant fraction of the total Cr (VI) uptake was achieved within 60 min. Biosorbed chromium ions concentrations increased with increasing concentrations of biosorbents and increasing pH. The biosorption of Cr (VI) on G. salicornia and Sargassum sp. could best be described by the Langmuir model (R2>0.997 for Sargassum sp. and R2>0.999 for G. salicornia).]]>Aksu, Z. and D. Akpinar,20017183193Bailey, S.E., T.J. Olin, R.M. Bricka and D.D. Adrian,19993324692479Chirwa, E.N. and Y.T. Wang,20003423762384Crist, R.H., K. Oberholser, J. McGarrity, D.R. Crist, J.K. Johnson and J.M. Brittsan,199226496502Davis, T.A., B. Volesky and R.H.S.F. Vieira,2000Sargassum seaweed as biosorbent for heavy metals.]]>3442704278Davis, T.A., B. Volesky and A. Mucci,20033743114330Holan, Z.R. and B. Volesky,19944310011009International Agency for Research on Cancer,19971997Karthikeyan, S., R. Balasubramanian and C.S.P. Iyer,2007Ulva fasciata and Sargassum sp. for the biosorption of Cu(II) from aqueous solutions.]]>98452455Matheickal, J.T. and O. Yu,199969223229Morand, P. and X. Briand,199639419516Mungasavalli, D.P., T. Viraraghavan and Y.C. Jin,2007Aspergillus niger: Batch and column studies.]]>301214223Nasseri, S., M.M. Assadi, M.N. Sepehr, K. Rostami, M. Shariat and K. Nadafi,2002Aspergillus oryzae.]]>510561059Pagnelli, F., M.P. Petrangeli, L. Toro, M. Trifoni and F. Veglio,2000Arthrobacter sp: Biomass characterization and biosorption modeling.]]>3427732778Park, D., Y.S. Yun and J.M. Park,20054025592565Patterson, J.W. and M.A. Stoneham,1985pp: 353-393pp: 353-393Ramelow, G.J., D. Fralick and Y.F. Zhao,1992728193Schiewer, S. and M.H. Wong,200041271282Spinti, M., H. Zhuang and E.M. Trujillo,199567943952Srinath, T., T. Verma, P.W. Ramteke and S.K. Garg,200248427435Valiela, I., J. McClelland, J. Hauxwell, P.J. Behr, D. Hersh and K. Forema,19974211051118Veglio, F. and F. Beolchini,199744301316Volesky, B. and Z.R. Holan,199511235250Wang, J., X. Zhan, D. Ding and D. Zhou,200187273277Yun, Y.S., D. Park, J.M. Park and B. Volesky,20013543534358