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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/9096

Title: kinetic and Equilibrium studies of lead and cadmium biosorption from aqueous solutions by sargassum SPP
Authors: Nabizadeh, R.
Naddafi, K.
Saeedi, R.
Mahvi, A. H.
Vaezi, F.
Yaghmaeian, K.
Nazmara, S.
Keywords: Biosorption, sargassum, lead (II); cadmium (II), kinetic, isotherm
Issue Date: 31-Dec-2005
Publisher: Iranian Association of Environmental Health (IAEH)
Citation: Iranian Journal of Environmental Health, Science and Engineering (ISSN: p-ISSN: 1735-1979) Vol 2 Num 3
Abstract: Contamination of the aqueous environment by heavy metals is a worldwide environmental problem. Biosorption of lead (II) and cadmium (II) from aqueous solutions by brown algae Sargassum   spp. biomass was studied in a batch system. The heavy metals uptake was found to be rapid and reached to 88-96% of equilibrium capacity of biosorption in 15min. The pseudo second-order and saturation rate equations were found in the best fitness with the kinetic data (R2 > 0.99). The data obtained from experiments of single-component biosorption isotherm were analyzed using the Freundlich, Langmuir, Freundlich-Langmuir and Redlich-Peterson isotherm models. The Redlich-Peterson equation described the biosorption isotherm of Pb2+ and Cd2+ with high correlation coefficient (R2 0.99) and better than the other equations. The effect of Na+, K+, Mg2+ and Ca2+ on the biosorption of Pb2+ was not significant, but the metal ions affected the biosorption of Cd2+ considerably. According to the Langmuir model, the maximum uptake capacities (qm) of Sargassum spp. for Pb2+ and Cd2+ were obtained as 1.70 and 1.02mmol/g, respectively. Although the Sargassum spp. used in this study can be classified as an efficient biosorbent.
URI: http://hdl.handle.net/1807/9096
Other Identifiers: http://www.bioline.org.br/abstract?id=se05023
Rights: Copyright 2005 - Tehran University of Medical Sciences Publications
Appears in Collections:Bioline International Legacy Collection

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