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Full Length Research Paper
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Application of
Aspergillus niger SA1 for the enhanced bioremoval of azo
dyes in Simulated Textile Effluent
Naeem Ali1, Abdul Hameed2, Muhammad
Faisal Siddiqui3*, Pir Bux Ghumro2 and
Safia Ahmed2
1Department
of Environmental Science, International Islamic University,
Islamabad, Pakistan.
2Department
of Microbiology, Quaid-i-Azam University, Islamabad,
Pakistan.
3Department
of Biotechnology, Quaid-i-Azam University, Islamabad,
Pakistan.
*Corresponding author. E-mail:
send2biotech@yahoo.com or
naeemali95@gmail.com.
Tel: 92-333-9017644. 92-344 5000174.
Accepted 30
June, 2009 |
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Abstract |
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Biological remediation is always envisaged as cost effective
and eco-friendly for the treatment of recalcitrant dyes and
effluents. Aspergillus niger SA1, a brown rot fungi,
isolated from storage pond of textile wastewater, showed a
great mineralizing ability for azo dyes, acid red (AR) 151
and orange (Or) II. Decolorization assays were carried out
for 24 h, by taking 100 ml of dye containing Simulated
Textile Effluent (STE) with 5 g of freshly grown fungal
pellets. Decolorization of AR 151 was well over 95% under
different conditions, however, it reduced to 52% when
treated with pre-used fungal biomass under shaking
condition. In case of Or II, results were 50 and 61% under
static while 65 and 85% under shaking condition with fresh
and pre-used fungal biomass respectively. Primarily, dyes
removal in STE appeared due to biosorption/bioadsorption of
the fungal biomass. However, discoloration of dyes onto the
biomass with subsequent formation and then decline in their
products in STE suggested clearly that dyes were basically
metabolically degraded by the fungal strain.
Key
words:
Acid red 151, Aspergillus niger, azo dyes,
decolorization, degradation, orange II. |
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