Concurrent Removal and Reduction of Cr(VI) by Wool: Short and Long Term Equilibration Studies


Hexavalent chromium removal from wastewater using sheep wool was investigated at several equilibration periods. The influence of contact time, pH, adsorbent dosage and initial concentration was investigated. Adsorption isotherms for long and short periods were fitted to the Langmuir and Freundlich isotherms. For short contact times, the Langmuir adsorption isotherm was obeyed with no detectable change in the oxidation state but removal percentages did not exceed 90%. Long contact times resulted in more than 99% removal of Cr(VI). A 2-step mechanism for the removal is proposed. Free wool and wool loaded with Cr(VI) were characterized by FTIR and SEM.

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Jumean, F. , Khamis, M. , Sara, Z. and AbouRich, M. (2015) Concurrent Removal and Reduction of Cr(VI) by Wool: Short and Long Term Equilibration Studies. American Journal of Analytical Chemistry, 6, 47-57. doi: 10.4236/ajac.2015.61005.

Conflicts of Interest

The authors declare no conflicts of interest.


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