Background: Improved mycelial pellet with superior decolorization ability and
reusability was firstly cultivated and coupled with activated carbon for enhancement of dyecontaining
wastewater adsorption, which was named MP-AC.
Methodology: Depending on several parameters such as pellet size and dry/wet ratio, the optimum
amount of activated carbon powder was determined as 0.015 g·mL-1 spore suspension,
and the mycelial pellet contained the certain amount of activated carbon powder named
as MP-AC-5. The microscope and SEM images clearly described the activated carbon powder
wrapped in the net of pellet unevenly without destroying the structure. By comparing
with single mycelial pellets (SMP) under different condition, the decolorization ability of
MP-AC-5 was investigated and the results showed that MP-AC-5 (1.0g) had higher decolorization
efficiency and better reusability than SMP (1.5g) under different pH and dyeconcentrations.
Conclusion: The pseudo-second order kinetic model was able to describe the biosorption
equilibrium of Eriochrome black T (EBT) onto the MP-AC-5 with a high determination coefficient
(R2 > 0.999) and the Langmuir isotherm model was able to describe the biosorption
equilibrium of Eriochrome black T (EBT) onto the MP-AC-5.
Keywords: Activated carbon, adsorption kinetics, biosorption, color removal, eriochrome black T, Mycelial
pellet, wastewater treatment.
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