Bioreduction of Hexavalent Chromium by Live and Active Phanerochaete chrysosporium: Kinetics and Modeling |
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Authors: | Somasundaram Murugavelh Kaustubha Mohanty |
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Institution: | Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India |
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Abstract: | In this work the potential of live and active Phanerochaete chryosporium, a white rot fungi, to remove lower Cr(VI) concentration from aqueous solutions was reported for the first time. A medium pH had significant effect on the growth of the fungus and bioremoval of Cr(VI). Substrate inhibition on the growth of Phanerochaete chrysosporium was evident beyond 20 g L?1 of dextrose concentration. A maximum biomass concentration of 15.64 g L?1 was obtained for an initial dextrose concentration of 20 g L?1 in metal free medium at pH 6.0. An increase in Cr(VI) concentration beyond 10 mg L?1 inhibited the growth of the fungi, thereby, reducing the chromium bioremoval efficiency. A maximum reduction efficiency of 98.92% was reported for an initial metal concentration of 10 mg L?1. A mathematical expression for the bioreduction of Cr(VI) considering the organic compounds in the cells was proposed. |
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Keywords: | Bioremoval Health risk Heavy metal Wastewater treatment White rot fungi |
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