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Biosorption of Lead ions onto Laminaria japonica and Kjellmaniella crassifolia : Equilibrium and Kinetic Modelling  

Lee, Chang-Han (SamYeong Environment Technology Co, Ltd)
Ahn, Kab-Hwan (School of Environ. Sci., Catholic University of Pusan)
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Abstract
The batch experiments of biosorption were carried out for the removal of lead ion from metal solution using Laminaria japonica and Kjellmaniella crassifolia, two species of marine algaes as biosorbent. We have investigated biosorption kinetics and equilibrium of lead by using marine algaes. We observed that biosorption of lead occurred very rapidly by marine algaes ; the biosorption reached equilibrium less than 2 hr. These experimental data could be accurately described by a pseudo-second-order rate equation, obtaining values between $0.883{\times}10^{-3}$ and $0.628{\times}10^{-3}\;g/mg/min$ for the biosorption rate constant $k_{2,ad}$. It could be described with Langmuir, Redlich-Peterson, and Koble-Corrigan(Langmuir-Freundlich) equation. The biosorption capacity by L. japonica and K. crassifolia were in the sequence of Pb>Cd>Cr>Cu and Pb>Cu>Cd>Cr, respectively. The biosorption capacity of L. japonica were increased with pH increasing.
Keywords
Biosorption; Laminaria japonica; Kjellmaniella crassifolia; Kinetic Model; Equilibrium Model;
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