Details

Autor(en) / Beteiligte

• Bennett, Reuel M
• Cordero, Paul Rodrigo F
• Bautista, Gershon S
• Dedeles, Gina R

Titel

Reduction of hexavalent chromium using fungi and bacteria isolated from contaminated soil and water samples

Ist Teil von

• Chemistry and ecology, 2013-05, Vol.29 (4), p.320-328

Ort / Verlag

Abingdon: Taylor & Francis

Erscheinungsjahr

2013

Quelle

Taylor & Francis Journals Auto-Holdings Collection

Beschreibungen/Notizen

• The reductive adsorption of hexavalent chromium (Cr⁶⁺) using six indigenous microorganisms isolated from contaminated soil and water samples was investigated. Quantification of Cr⁶⁺ reduction was determined using the 1,5-diphenylcarbazide method followed measuring the absorbance at OD₅₄₀. Bacterial isolates identified as Klebsiella pneumoniae, Bacillus firmus and Mycobacterium sp. were capable of absorbing Cr⁶⁺ efficiently into their biomass, whereas the fungal isolates, Aspergillus flavus, Aspergillus sp. and A. niger were capable of transforming Cr⁶⁺ to Cr³⁺ relative to cell-wall-binding properties. Infrared spectral analysis of functional groups showed that ‒OH, ‒NH₂ and C˭O with conjugated ‒NH were the binding groups responsible for adsorption of Cr⁶⁺ within the biomass of isolates. The data highlight the promising biotechnological application of these isolates in removing carcinogenic and mutagenic Cr⁶⁺ from contaminated ecosystems.