Removal of arsenic /V) in aqueous solution by modified fungal biomass of aspergillus Niger [Remoción de arsénico (V) en solución acuosa por biomasa modificada del hongo aspergillus Niger]
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abstract
The removal capacity of arsenic (As V) in aqueous solution by the modified fungal biomass of Aspergillus Niger, by atomic absorption spectrometry, was analyzed. Arsenic contamination is very serious in Mexico, it affects almost all populations, and the removal techniques are very expensive and not very efficient. In this study, the highest bioadsorption (69%25 with 1 mg L-1of the metalloid) was at 24 hours at pH 6.0, 28oC and 1 g of modified biomass. With respect to the temperature, the highest removal was at 28oC, with a 69%25 removal in 24 hours. At higher concentration of arsenic the removal was lower, and by increasing the concentration of the bioadsorbent, the removal is more efficient (96%25 with 5 g of biomass). Additionally, the biomass efficiently removes the metalloid in situ (56%25 removal in natural water contaminated with 1 mg 100 mL-1of As (V) in 24 hours with 1 g of biomass). Therefore, the modified biomass can be used to eliminate arsenic from industrial wastewater.
