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Column Bioleaching of Arsenic and Heavy Metals from Gold Mine Tailings by Aspergillus fumigatus by Bahi Jalili Seh‐Bardan; Radziah Othman; Samsuri Ab Wahid; Aminudin Husin; Fardin Sadegh‐Zadeh is a Environmental Science article available to read on EtoBox.

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## Abstract A column bioleaching experiment was carried out to compare the effectiveness of the fungus __Aspergillus fumigatus__ to bioleach arsenic (As) and heavy metals from the tailings using two different methods. In the first method, which is named as distribution method (DM), the fungus was distributed in the column by means of vertical and horizontal layers of coarse sand. In the other method, named as surface applied method (SAM), the fungus was cultivated on the surface of the tailings, which was covered with a few centimeters of coarse sand. Results showed that in the DM, oxalic acid production was stimulated and maximum removal of As, Fe, Mn, and Zn was 53, 51, 81, and 62%, respectively. However, Pb removal was low (8%), which might be due to the precipitation of Pb as its oxalates. On the other hand, the maximum removal of As, Fe, Mn, Pb, and Zn were 22, 28, 37, 64, and 34%, respectively, for the SAM. Results of the sequential extraction study showed that the DM was effective in removing the water soluble, exchangeable, carbonate, and Fe/Mn oxide fractions of As, Fe, Mn, and Zn. Our study suggested that __A. fumigatus__ has a potential to be used in remediation of heavy

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Author

Bahi Jalili Seh‐Bardan; Radziah Othman; Samsuri Ab Wahid; Aminudin Husin; Fardin Sadegh‐Zadeh

Publisher

Wiley

Published

2012

Language

EN

Field

Environmental Science (Physical Sciences)