Biosorption potential of dried Penicillium restrictum for Reactive Orange 122: isotherm, kinetic and thermodynamic studies
✍ Scribed by Semra Ilhan; Cansu Filik Iscen; Necmettin Caner; Ismail Kiran
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2008
- Tongue
- English
- Weight
- 138 KB
- Volume
- 83
- Category
- Article
- ISSN
- 0268-2575
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✦ Synopsis
Abstract
BACKGROUND: This paper evaluates the biosorption of Reactive Orange 122 dye (RO 122) by dried Penicillium restrictum cells. The aim was to determine the pH, contact time, temperature and dye concentration for the applicability of biomass as an alternative biosorbent for the removal of RO 122.
RESULTS: Optimum initial pH and equilibrium time for RO 122 were determined as 1.0 and 75 min at 25 °C, respectively. The maximum biosorption capacity (q~max~) of biomass obtained from the Langmuir fit was 180.7, 190.1 and 219.8 mg g^−1^ biomass at 25, 40 and 50 °C, respectively. Both Langmuir and Freundlich isotherm models were fitted to the experimental data at constant temperatures of 25, 40 and 50 °C. The biosorption process was found to obey a pseudo‐second‐order kinetic model and was favourable at high temperatures.
CONCLUSIONS: The biomass could be an alternative biosorbent to RO 122 dye removal because of having advantages of being easily cultivable, its low cost, high biosorption capacity with low biomass dosage (0.4 g dm^−3^) and reasonably rapid biosorption rate. Copyright © 2008 Society of Chemical Industry