Biosorption of Aspergillus flavus NCBT 102 Biomass in Hexavalent Chromium

M. N. Abubacker^1* and B. Kirthiga²

1Department of Biotechnology, National College, Tiruchirappalli, India.

2Department of Microbiology, D.G.Vishnav College, Chennai, India.

DOI : http://dx.doi.org/10.13005/bbra/1194

ABSTRACT:

Biosorption, using microbes is regarded as cost-effective technology for the treatment of metal-bearing waste waters. In recent years, several biosorbents have been investigated. In the present study, Aspergillus flavus, Chromium resistant fungal strains was isolated and morphologically characterized from the soil samples textile effluent discharged unit is used as biosorption organism. The efficacy of isolates for the biosorption of hexavalent chromium was analyzed. Effect of various parameters was assayed, which include temperature (optimized at 27°C), pH (optimized at 1), different carbon (effective with sucrose), initial metal (decreased with increasing concentration) and different biomass concentration (increases with increasing concentration). In chromium treated biosorbent, adsorption bands observed at 3430.72 cm-1, 2932.84 cm-1, 1638.72 cm-1, 1542.89 cm-1, 1155.47 cm-1 and 1047.63 cm-1. SEM image concludes over the biosorption period, the morphology of the fungus had undergone remarkable physical disintegration. The isolate has 58% biosorption capacity and released 40% biosorbed Cr(VI) ions on NaOH desorption studies.

KEYWORDS: Aspergillus flavus; Biosorption; Hexavalent chromium

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