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Biodecolorization of acid
violet 19 by Alternaria solani
Hazrat Ali* and Shah
Khalid Muhammad
Department
of Biotechnology, University of Malakand, Chakdara,
Pakistan.
*Corresponding author. E-mail:
hazratali80@yahoo.com,
Tel: 92-945-764131 Ext. 3027.
Accepted 6
February, 2008 |
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Microorganisms are the nature’s tools for cleaning the
environment. Bioremediation using bacteria, fungi and algae
is becoming an attractive option for the treatment of
industrial effluents containing a wide spectrum of
pollutants including dyes and heavy metal ions. In the
current research work, the potential of a deuteromycete
fungus, Alternaria solani for the removal of a dye,
Acid Violet 19 from aqueous solution was studied. The fungus
showed promising potential for the decolorization of the dye
(88.6%) at a dye concentration of 30 mg/L within a
relatively short period of time (four days). But with
increase in the contact time, the % decolorization decreased
showing that some of the adsorbed dye was desorbed
especially in case of higher dye concentrations. The
desorption of the dye from the fungal cells at long contact
time and higher dye concentrations was considered to be due
to higher molecular mass, structural complexity and the
presence of inhibitory groups, SO3Na in the dye.
Key
words:
Decolorization, Acid Violet 19, Alternaria solani,
biosorption, desorption. |
