Enhanced Adsorption of Metal Ions Onto Polyethyleneimine-Impregnated Palm Shell Activated Carbon: Equilibrium Studies
- First Online:
- 318 Downloads
In this study, palm shell activated carbon was impregnated with polyethyleneimine (PEI) and the effect of impregnation on batch adsorption of Ni2+, Cd2+or Pb2+ as well as the equilibrium behavior of adsorption of metal ions on PEI-impregnated AC were investigated. PEI impregnation evidently increased the single metal adsorption capacities of Ni2+ or Cd2+except for Pb2+, where its adsorption capacities were reduced by 16.67% and 19.55% for initial solution pH of 3 and 5 respectively. This suggested that PEI-impregnated AC could be used for selective separation of Pb2+ ions from other metal ions. The adsorption data of all the metal ions on both virgin and PEI-impregnated AC for both initial solution pH of 3 and 5 generally fitted the Langmuir and Redlich-Peterson isotherms considerably better than the Freundlich isotherm.
KeywordsAdsorption Isotherms Metal ions Palm shell activated carbon Polyethyleneimine
equilibrium concentration, mg/l
initial concentration, mg/l
weight of AC, g.
pH of point of zero charge
equilibrium adsorption capacity, mg/g.
adsorbate adsorbed per unit mass of adsorbent (monolayer adsorption), mg/g.
- Ali, U. F. M., Aroua, M. K., & Daud, W. M. A. W. (2004). Modification of a granular palm shell based activated carbon by acid pre-treatment for enhancement of copper adsorption. Paper presented at the Third Technical Postgraduate Symposium, Kuala Lumpur, Malaysia, December.Google Scholar
- Department of Environment (DOE) (2002). Malaysian environmental quality report. ISSN 0127-6433.Google Scholar
- Freundlich, H. (1906). Adsorption in solution. Physical Chemistry Society, 40, 1361–1368.Google Scholar
- Gustafsson, J. P. (2006). VMINTEQ 2.50 software manual. Retrieved January 2006 from http://www.lwr.kth.se/English/OurSoftware/vminteq.
- Issabayeva, G. (2005). Adsorption and electroreduction of copper and lead ions on palm shell activated carbon. Dissertation, University of Malaya.Google Scholar
- Issabayeva, G., Aroua, M. K., & Sulaiman, N. M. N. (2006). removal of lead from aqueous solutions on palm shell activated carbon. Bioresource Technology, 97, 2350–2355.Google Scholar
- Wu, S. N., & Chen, P. J. (2001). Modification of a commercial activated carbon for metal adsorption by several approaches. Paper presented at International Containment & Remediation Technology Conference and Exhibition, Orlando, Florida, June.Google Scholar
- Yin, C. Y., Aroua, M. K., & Daud, W. M. A. W. (2007a). Modification of granular activated carbon using low molecular weight polymer for enhanced removal of Cu 2+ from aqueous solution. Paper presented at International Conference on Water Management and Technology Applications in Developing Countries, Kuala Lumpur, Malaysia, May.Google Scholar