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Study On The Biosorption Of Synthetic Dyes Using Immobilized Fungal Biomass And Aquatic Weeds | 4515
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The large amount of lignin and lignin-derived compounds are primarily responsible for effluent colour, due to the inherent
high degree of conjugation in these molecules. There is thus the requirement on industries to minimise environmental release
of colour considered as toxicologically rather innocuous. Biological treatment is the often the most economical alternatives
when compared with other physical and chemical processes. Biodegradation methods such as fungal decolourization, microbial
degradation, adsorption by (living or dead) microbial biomass and bioremediation systems are commonly applied to the
treatment of industrial effluents.
Biosorption potential of fungal species (Aspergillus niger) and Aquatic weed (Eichhornia crassipes) for synthetic dye such as
Acid- Lanasyn yellow M2GLN P250 and Direct- Indosol royal blue 3RL studied with respect to temperature, time, pH, adsorbent
dosage, agitation time and initial dye concentration to determine the kinetic model. The mechanism of dye sorption by Aspergillus
niger and Eichhornia crassipes earned good fits for Freundlich and Langmuir models. The analogy of percentage removal of dye
were determined between physical phenomena and the immobilized fungal species. Further desorption techniques were studies
to recover the loaded pollutants. This study has shown the efficiency of A.niger and E.crassipes immobilized into Ca- alginate
beads for the decolourization of synthetic dyes. Batch studies clearly suggest that the high adsorption capacity for the removal
of Acid- Lanasyn yellow M2GLN P250 and Direct- Indosol royal blue 3RL dye were obtained at pH- 6. Up to 86% color removal
could be achieved in 31/2 days contact with initial dye concentration (2 to 10 mg/ml), respectively. For 4mg/ml solution, 86.6%
maximum color removal achieved with 0.3g/ml dose, 30
0
C and 180rpm by using A.niger. For 2mg/ml solution, 75% maximum
color removal achieved with 0.9g/ml dose, 30
0
C and 180rpm by using E.crassipes. In addition, it is found to be the reusability of
the immobilised A.niger and E.crassipes after storage could be a potential advantage in wastewater treatment.
Biography
I R Sivashankar, Research scholar, Department of Chemical Engineering, NIT, Calicut have Published 2 papers in reputed journals. I have
participated & presented 2 papers in International Conferences and 13 National Conferences and Symposiums
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