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Performance of Dead Azolla filiculoides Biomass in Biosorption of Au from Wastewater

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Abstract

Dried milled biomass of Azolla filiculoides removed up to 98.2% of gold from wastewater from a gold plating factory containing 5 mg gold/l in solution in batch biosorption. The gold uptake capacity of the biomass was 98 mg/g. Whole dried biomass used in a continuous flow column removed up to 100% of gold from diluted wastewater. A similar column was linked to a sulphide precipitation process to provide a two-step system which was able to remove 98% of gold from undiluted wastewater containing 41 mg Au/l. The lifetime of the column was five days.

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Authors and Affiliations

  1. Department of Biochemistry, Microbiology and Biotechnology, Rhodes University, 6140, Grahamstown, South Africa

    L. J. Umali, J. R. Duncan & J. E. Burgess

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  1. L. J. Umali
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  2. J. R. Duncan
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  3. J. E. Burgess
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Correspondence to J. E. Burgess.

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Umali, L.J., Duncan, J.R. & Burgess, J.E. Performance of Dead Azolla filiculoides Biomass in Biosorption of Au from Wastewater. Biotechnol Lett 28, 45–50 (2006). https://doi.org/10.1007/s10529-005-9686-7

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  • DOI: https://doi.org/10.1007/s10529-005-9686-7

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