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  • Title: Performance of dead Azolla filiculoides biomass in Biosorption of Au from wastewater.
    Author: Umali LJ, Duncan JR, Burgess JE.
    Journal: Biotechnol Lett; 2006 Jan; 28(1):45-50. PubMed ID: 16369874.
    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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