Biosorption of heavy metals from aqueous solution using modified activated carbon: comparison of linear and nonlinear methods
✍ Scribed by Yi-Ling Lai; Gurusamy Annadurai; Fu-Chang Huang; Jiunn-Fwu Lee
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2008
- Tongue
- English
- Weight
- 545 KB
- Volume
- 83
- Category
- Article
- ISSN
- 0268-2575
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✦ Synopsis
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