Article: Bioaccumulation and biosorption of drimarene red dye by Aspergillus foetidus Journal: International Journal of Environment and Pollution (IJEP) 2006 Vol.28 No.3/4 pp.517 - 533 Abstract: An isolated fungus, Aspergillus foetidus, was found to uptake azo reactive dye(s) such as drimarene red under active growth and growth unsupportive conditions. Microscopy indicates preferential accumulation of drimarene red dye in the tips of fungal hyphae. The presence of 0.1% azide and phosphate in the fungal growth medium causes displacement of bound dye from the biomass. The key factors that influence the process of biosorption of dye in growth non-supportive medium are pH, temperature, and age and concentration of fungal biomass. Based on the Langmuir isotherm plots, the maximum fungal biosorption capacity (Qo value) was computed to be 344 mg g-1 using the fungal spent medium at pH 2.5 and 60°C. Sodium hydroxide is an effective agent for the leaching of dye from the loaded fungal biomass. The results suggest the possibility of applying the isolated fungus for decolourisation of textile mill wastewater. Inderscience Publishers - linking academia, business and industry through research

Title: Bioaccumulation and biosorption of drimarene red dye by Aspergillus foetidus

Authors: C. Bidisha, R. Sreeranjani, A. Shaik, S. Chaudhari, S. Sumathi

Addresses: Centre for Biotechnology, Indian Institute of Technology-Bombay, Powai, Mumbai 400 076, India. ' Centre for Environmental Science and Engineering, Indian Institute of Technology-Bombay, Powai, Mumbai 400 076, India. ' Centre for Environmental Science and Engineering, Indian Institute of Technology-Bombay, Powai, Mumbai 400 076, India. ' Centre for Environmental Science and Engineering, Indian Institute of Technology-Bombay, Powai, Mumbai 400 076, India. ' Centre for Environmental Science and Engineering, Indian Institute of Technology-Bombay, Powai, Mumbai 400 076, India

Abstract: An isolated fungus, Aspergillus foetidus, was found to uptake azo reactive dye(s) such as drimarene red under active growth and growth unsupportive conditions. Microscopy indicates preferential accumulation of drimarene red dye in the tips of fungal hyphae. The presence of 0.1% azide and phosphate in the fungal growth medium causes displacement of bound dye from the biomass. The key factors that influence the process of biosorption of dye in growth non-supportive medium are pH, temperature, and age and concentration of fungal biomass. Based on the Langmuir isotherm plots, the maximum fungal biosorption capacity (Q_o value) was computed to be 344 mg g^-1 using the fungal spent medium at pH 2.5 and 60°C. Sodium hydroxide is an effective agent for the leaching of dye from the loaded fungal biomass. The results suggest the possibility of applying the isolated fungus for decolourisation of textile mill wastewater.

Keywords: azo dye; bioaccumulation; biosorption; decolourisation; drimarene red dye; fungus; textile dye; Aspergillus foetidus; isolated fungus; environmental pollution; biomass; sodium hydroxide; textile mills; wastewater; textile dyeing.

DOI: 10.1504/IJEP.2006.011226

International Journal of Environment and Pollution, 2006 Vol.28 No.3/4, pp.517 - 533

Published online: 06 Nov 2006 *

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Title: Bioaccumulation and biosorption of drimarene red dye by Aspergillus foetidus

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