Removal of heavy metal from industrial wastewater using chitosan coated oil palm shell charcoal
Saifuddin M. Nomanbhay, and Kumaran Palanisamy, (2008) Removal of heavy metal from industrial wastewater using chitosan coated oil palm shell charcoal. Electronic Journal of Biotechnology, 8 (1). ISSN 07173458 Full text not available from this repository. Official URL: http://www.ejbiotechnology.info/content/vol8/issue1/full/7/7.pdf AffiliationsUniversiti of Tenaga Nasional, College of Engineering Universiti of Tenaga Nasional, College of Engineering AbstractThis research focuses on understanding biosorption process and developing a cost effective technology for treatment of heavy metals-contaminated industrial wastewater. A new composite biosorbent has been prepared by coating chitosan onto acid treated oil palm shell charcoal (AOPSC). Chitosan loading on the AOPSC support is about 21% by weight. The shape of the adsorbent is nearly spherical with particle diameter ranging 100~150 μm. The adsorption capacity of the
composite biosorbent was evaluated by measuring the extent of adsorption of chromium metal ions from water under equilibrium conditions at 25ºC. Using Langmuir isotherm model, the equilibrium data yielded the following ultimate capacity values for the coated biosorbent on a per gram basis of chitosan: 154 mg Cr/g. Bioconversion of Cr (VI) to Cr (III) by chitosan was also observed and had been shown previously in other studies using plant tissues and mineral surfaces. After the biosorbent was saturated with the metal ions, the adsorbent was regenerated with 0.1 M sodium
hydroxide. Maximum desorption of the metal takes place within 5 bed volumes while complete desorption occurs within 10 bed volumes. Details of preparation of the biosorbent, characterization, and adsorption studies are presented. Dominant sorption mechanisms are ionic interactions and complexation. | Item Type: | Journal |
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| Keywords: | Chitosan bioabsorbent, chromium (III), chromium (IV), heavy metal adsorption, oil palm shell charcoal |
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| Subjects: | S Agriculture Q Science |
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| ID Code: | 1890 |
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