Biosorption of heavy metals from aqueous solution using modified activated carbon: comparison of linear and nonlinear methods |
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| Authors: | Yi‐Ling Lai Gurusamy Annadurai Fu‐Chang Huang Jiunn‐Fwu Lee |
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| Affiliation: | 1. Graduate Institute of Environmental Engineering, National Central University, Chung‐Li 320, Taiwan, ROC;2. Department of Civil and Environmental Engineering, Nanya Institute of Technology, Chung‐Li 320, Taiwan, ROC |
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| Abstract: | BACKGROUND: Biosorption of heavy metals from aqueous solution by modified activated carbon with Phanerochaete chrysosporium immobilised in Ca‐alginate beads was investigated using a batch system and comparison of linear and nonlinear methods. RESULTS: The amount of Cu(II), Zn(II) and Pb(II) ion sorption by the beads was as follows: activated carbon with P. chrysosporium immobilised in Ca‐alginate beads (ACFCA) (193.4, 181.8, 136.6 mg g?1) > activated carbon immobilised in Ca‐alginate beads (ACCA) (174.8, 162.0, 130.7 mg g?1) > P. chrysosporium (F) (148.8, 125.6, 120.4 mg g?1) > activated carbon (AC) (138.8, 112.3, 109.3 mg g?1) > plain Ca‐alginate beads (PCA) (125.4, 105.2, 98.2 mg g?1). The widely used Langmuir and Freundlich isotherm models were utilised to describe the biosorption equilibrium process. CONCLUSION: The results of this study suggest that the immobilisation of modified activated carbon with P. chrysosporium in Ca‐alginate beads is suitable for a batch system. The isotherm parameters were estimated using linear and nonlinear regression analyses. The surface charge density of the biosorbents varied with the pH of the medium; the maximum biosorption of heavy metal ions on the biosorbents was obtained when the pH was between 5.6 and 7.4. Copyright © 2008 Society of Chemical Industry |
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| Keywords: | biosorption activated carbon heavy metal Phanerochaete chrysosporium |
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