Metal Removal from Spent Catalyst Using Microbacterium liquefaciens in Solid Culture

Abstract:

The purpose of the present study was to investigate the ability of Microbacterium liquefaciens strain MNSH2-PHGII-2, isolated from a Mexican silver mine, for removing Ni and V from spent catalyst at 80% (w/v) pulp density in a glass-column system at laboratory conditions. Firstly, microbial culture was adapted to spent catalyst at 0.1% (w/v) in liquid culture then, it was assayed by its ability to remove Ni and V from a spent catalyst in a glass-column system. Spent catalyst was packed at 80% (w/v) pulp density and inoculated at 20% (3x10⁸ CFU/ml); air was supplied at 80 ml/min and then incubated at 30°C during 14 days. Parameters such as microbial growth, pH, Ni and V residual concentrations, in catalyst, were determined at days 7 and 14. The result showed that Microbacterium liquefaciens strain MNSH2-PHGII-2 in the glass-column system was able to remove 1007.4 mg/kg of Ni while V was removed at an extent of 5360.5 mg/kg. Microbial removal for other metals in catalyst was non-significant, that indicated the specificity of Microbacterium liquefaciens to remove Ni and V.

• Periodical: Advanced Materials Research (Volume 1130)
• Pages: 564-567
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1130.564
• Online since: November 2015
• Authors: Norma G. Rojas-Avelizapa*, Marlenne Gomez-Ramirez, Alamilla Martínez Diana Grecia
• Keywords: Metals, Removal, Solid Culture, Spent Catalyst

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