Biosorption Potential Of Zinc By Egeria Densa Macrophytes [potencial De Biossorção Do Zinco Pela Macrófita Egeria Densa]

In this paper, the removal potential on Zn ion by macrophyte Egeria densa has been studied. The influence of the metal solution pH, the plant drying and the metal solution temperature, and biosorbent grain size was previously studied in batch systems. Adsorption kinetic and equilibrium experiments of metals onto E. densa were performed under controlled temperature and permanent shaking. In adsorption kinetic tests for Zn (II) the equilibrium time was around 45 min. The biosorption kinetic data were well fitted by a pseudo-second order model. The equilibrium data at pH 5 were described a rather better by the Langmuir isotherm than the Freundlich one, with an adsorption rate and maximum metal content values of 0,829L g-1and 0,92 mequiv g-1, respectively, for Langmuir model. The macrophytes E. densa could be used as biosorbent material in industrial effluent treatment system.144465470Bayramoglu, G., Yakup Arica, M., Removal of heavy mercury(II), cadmium(II) and zinc(II) metal ions by live and heat inactivated Lentinus edodes pellets (2008) Chemical Engineering Journal, 143, pp. 133-140Bini, L.M., Thomaz, S.M., Prediction of Egeria najas and Egeria densa occurrence in a large subtropical reservoir (Itaipu Resrvoir, Brazil - Paraguay) (2005) Aquatic Botany, 83 (3), pp. 227-238Chakravarty, S., Adsorption of zinc from aqueous solution using chemically treated newspaper pulp (2007) Bioresource Technology, 98 (16), pp. 3136-3141Chen, X., Interaction of Pseudomonas putida CZ1 with clays and ability of the composite to immobilize copper and zinc from solution (2009) Bioresource Technology, 100 (1), pp. 330-337Clarisse, M.D., Amorim, M.C.V., Lucas, E.F., Despoluição ambiental: Uso de polímeros na remoção de metais pesados (1999) Revista De Química Industrial, 67 (715), pp. 16-24Cruz, C.C.V., Kinetic modeling and equilibrium studies during cadmium biosorption by dead Sargassum sp (2004) Biomass. Bioresource Technology, 91 (33), pp. 249-257Davis, T.A., Volesky, B., Mucci, A., A review of the biochemistry of heavy metal biosorption by brown algae (2003) Water Research, 37 (18), pp. 4311-4330Fagundes-Klen, M.R., Equilibrium study of the binary mixture of cadmium-zinc ions biosorption by the Sargassum filipendula species using adsorption isotherms models and neural network (2007) Biochemical Engineering Journal, 34 (22), pp. 136-146Ho, Y.S., McKay, G., Pseudo-second order model for sorption processes (1998) Process Biochemistry, 34 (5), pp. 451-465Kratochvil, D., Volesky, B., Advances in the Biosorption of Heavy Metals (1998) Tibtech, 16, pp. 291-300Martínez, M., Removal of lead(II) and cadmium(II) from aqueous solutions using grape stalk waste (2006) Journal of Hazardous Materials, 133 (1-3), pp. 203-211Módenes, A.N., Pietrobelli, J.M.T.A., Espinoza-Quiñones, F.R., Cadmium biosorption by non-living aquatic macrophytes Egeria densa (2009) Water Science and Technology, 60 (2), pp. 293-300Ozcan, A., Determination of the equilibrium, kinetic and thermodynamic parameters of adsorption of copper(II) ions onto seeds of Capsicum annuum (2005) Journal of Hazardous Materials, 124 (1-3), pp. 200-208Rubio, J., Schneider, I.A.H., Plantas Aquáticas: Adsorventes Naturais para a Melhoria da Qualidade das Águas (2003) Xix Prêmio Jovem Cientista - Água: Fonte De VidaSenthilkumar, R., Seaweeds for the remediation of wastewaters contaminated with zinc(II) ions (2006) Journal of Hazardous Materials, 136 (3), pp. 791-799Ucun, H., Aksakal, O., Yildiz, E., Copper(II) and zinc(II) biosorption on Pinus sylvestris L (2008) Journal of Hazardous Materials, 161 (2-3), pp. 1040-104