Journal
WATER SCIENCE AND TECHNOLOGY
Volume 59, Issue 10, Pages 2073-2079Publisher
IWA PUBLISHING
DOI: 10.2166/wst.2009.866
Keywords
biosorption; colored wastewater; fungus; immobilization; isotherm
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In this study potential applicability of immobilised biomass of a wood-rotting dead macro-fungus Fomitopsis carnea are explored for the removal of the basic dye Alcian Blue. Effect of several parameters viz., temperature, pH and salt were studied in batch mode. In view of reutilization of the dye as well as the biosorbent, desorption/ regeneration experiments were conducted. Desorption/regeneration studies could also be helpful in determining dye sorption mechanism. Studies indicate that the immobilized biosorbent could remove Alcian Blue efficiently. The experimental equilibrium data were modeled using the Langmuir equation. Dye uptake capacity of the biosorbent was observed to increase with rise in temperature and indicates chemisorption and/or ion exchange. The uptake was 11.1, 13.2, 16.4 and 24.2 mg/g at 10, 20, 30 and 40 degrees C respectively. Higher removal of dye was also observed at higher pH. However, increased salt concentration from 0 mmol/L to 100 mmol/L reduced from 89 to 85%. Desorption of dye could be possible up to 51% using 0.1M hydrochloric/acetic acids and thus suggests that ion-exchange and chemisorption could be the possible dye sorption mechanism.
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