Banana peel: A green and economical sorbent for the selective removal of Cr(VI) from industrial wastewater

JR Memon, SQ Memon, MI Bhanger, A El-Turki, KR Hallam, GC Allen

Research output: Contribution to journalArticle (Academic Journal)peer-review

108 Citations (Scopus)

Abstract

This study describes the use of banana peel, a commonly produced fruit waste, for the removal of Cr(VI) from industrial wastewater. The parameters pH, contact time, initial metal ion concentration, and temperature were investigated and the conditions resulting in rapid and efficient adsorption (95% within 10 min) were determined. The binding of metal ions was found to be pH dependent with the optimal sorption occurring at pH 2. The retained species were eluted with 5mL of 2M H2SO4. To elucidate the mechanism of the process, total amounts of chromium and Cr(VI) were analyzed using flame atomic absorption and ultraviolet–visible (UV–vis) spectroscopic techniques, respectively. The Langmuir and Dubinin–Radushkevich (D–R) isotherms were used to describe the partitioning behavior for the system at different temperatures. Kinetics and thermodynamics of Cr(VI) removal by banana peelwere also studied. The influence of diverse ions on the sorption behavior revealed that only Fe(II) ions (of those tested) suppressed the sorption of Cr(VI) ions to some extent. The method was applied for the removal of Cr(VI) from industrial wastewater.
Translated title of the contributionBanana peel: A green and economical sorbent for the selective removal of Cr(VI) from industrial wastewater
Original languageEnglish
Pages (from-to)232 - 237
Number of pages6
JournalColloids and Surfaces B: Biointerfaces
Volume70
DOIs
Publication statusPublished - May 2009

Bibliographical note

Publisher: Elsevier

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