Abstract
In this study, the optimal conditions for decolourizing Levafix brilliant blue EB (LB) were determined for both active (actively growing or active) and inactive (inactivated or inactive) Aspergillus oryzae. The adsorption capacity of active and inactive A. oryzae was compared using adsorption isotherm models. Our equilibrium data fitted well to Langmuir model. Under optimal conditions, the maximum monolayer LB adsorption capacities of active and inactive A. oryzae were 61 and 66 mg/g, respectively. The longevity of this decolourization activity under optimal conditions was investigated in repeated mode by adding 250 mg/l of dye in five dosages (50 mg/l each) in the growth medium of A. oryzae. LB decolourization efficiency of the fungus remained high after 5 days operation. Desorption of LB was achieved using 0.1 M NaOH. The experimental results demonstrated that the A. oryzae pellets could effectively be used as a sorbent for removing textile dyes.
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