Coupling Alternating Current and Biosorption for the Removal of Hexavalent Chromium

The effect of coupling alternating current (AC) with biosorption using Tunisian corn stigmata on the removal of hexavalent chromium (Cr(VI)) from aqueous solution was studied. A comparative study was performed between biosorption alone and biosorption coupled with AC, for the removal of Cr(VI). The...

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Bibliographic Details
Published in:Chemical engineering & technology 2021-02, Vol.44 (2), p.339-348
Main Authors: Mbarki, Fatma, Othmani, Amina, Kesraoui, Aida, Seffen, Mongi
Format: Article
Language:English
Subjects:
Acceleration
Alternating current
Aqueous solutions
Biosorption
Chromium
Comparative studies
Corn stigmata
Coupling
Fractal models
Hexavalent chromium
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Summary:The effect of coupling alternating current (AC) with biosorption using Tunisian corn stigmata on the removal of hexavalent chromium (Cr(VI)) from aqueous solution was studied. A comparative study was performed between biosorption alone and biosorption coupled with AC, for the removal of Cr(VI). The effects of various operating parameters were studied, such as the solution pH, the contact time, the initial concentration, the temperature, and the salt concentration. The comparison between biosorption in the presence and absence of an AC shows the importance of the AC in the acceleration of the biosorption process. The kinetic study showed that the fractal Brouers‐Sotolongo model was the best model for describing the random distribution of the active sites. Biosorption is considered to be a successful pollutant treatment method. However, the time required for the removal of hazardous pollutants is still a major drawback to its use. The removal of hexavalent chromium Cr(VI) by biosorption on corn stigmata can be accelerated by coupling the biosorption with the application of an alternating current.
ISSN:0930-7516
1521-4125
DOI:10.1002/ceat.202000398