Adsorption of heavy metals from water using banana and orange peels

G. Annadurai*, R. S. Juang, D. J. Lee

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

528 Scopus citations

Abstract

Liquid-phase adsorption removal of Cu2+, Co2+, Ni2+, and Pb2+ in the concentration range of 5-25 mg/L using low-cost banana and orange peel wastes was examined at 30 °C. Under comparable conditions, the amount of adsorption decreased in the order Pb2+ > Ni2+ > Zn2+ > Cu2+ > Co2+ for both adsorbents. The adsorption isotherms could be better described by the Freundlich equation. The amount of adsorption increased with increasing pH and reached a plateau at pH > 7, which was confirmed by the variations of zeta potentials. The application potential of such cellulose-based wastes for metal removal (up to 7.97 mg Pb2+ per gram of banana peel at pH 5.5) at trace levels appeared to be promising.

Original languageEnglish
Pages (from-to)185-190
Number of pages6
JournalWater Science and Technology
Volume47
Issue number1
DOIs
StatePublished - 2003
Externally publishedYes

Keywords

  • Adsorption removal
  • Fruit peels
  • Heavy metals
  • Zeta potentials

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