Biosorption characteristics of Aspergillus fumigatus for the decolorization of triphenylmethane dye acid violet 49

Abstract

This study focuses on the possible use of Aspergillus fumigatus to remove acid violet 49 dye (AV49) from aqueous solution. In batch biosorption experiments, the highest biosorption efficiency was achieved at pH 3.0, with biosorbent dosage of 3.0 gL(-1) within about 30 min at 40 °C. The Langmuir and Freundlich models were able to describe the biosorption equilibrium of AV49 onto fungal biomass with maximum dye uptake capacity 136.98 mg g(-1). Biosorption followed a pseudo-second-order kinetic model with high correlation coefficients (R (2) > 0.99), and the biosorption rate constants increased with increasing temperature. Thermodynamic parameters indicated that the biosorption process was favorable, spontaneous, and endothermic in nature, with insignificant entropy changes. Fourier transform infrared spectroscopy strongly supported the presence of several functional groups responsible for dye-biosorbent interaction. Fungal biomass was regenerated with 0.1 M sodium hydroxide and could be reused a number of times without significant loss of biosorption activity. The effective decolorization of AV49 in simulated conditions indicated the potential use of biomass for the removal of color contaminants from wastewater.

Effect of Common Metal Ions and Anions on Laccase Catalysis of Guaiacol and Lignocellulosic Fiber

“…As shown in Fig. 1 (Chaudhry et al 2014;Pan et al 2014). With an increase in the Cl -ion concentration, the laccase activity rapidly decreased, and the inhibition rate of 79.3% was attained when the concentration of Cl -reached 30 mM.…”

Removal of hydrolyzed Reactive Black 5 from aqueous solution using a polyethylenimine–polyvinyl chloride composite fiber

“…The negatively charged sulfonic sites in RB5 can be easily bound with the positively charged amine sites in PEI-PVC fiber through electrostatic attraction. New peaks resulted from RB5 sorption appeared at 1033 (bridge C-O-C stretching and C-O stretching), 1124 (AS@O stretching), and 1490 cm À1 (-NH bending vibration in -NH 2 and -NH) [22,23]. Also, the intensity of these peaks was increased with increase of the dye uptake.…”

Decolorization and Detoxification of Triphenylmethane Dyes by isolated endophytic fungus, Bjerkandera adusta SWUSI4 under non-nutritive conditions

“…For example, showed that the biosorption of Acid Blue 25 by dead (autoclaved) Penicillium YW 01 involved amine, amide and carboxyl groups. Another fungi Aspergillus fumigatus, removal of Acid Violet 49 by dead (through freezing) was attributed to amino, carboxyl, phosphate, and sulfonyl groups (Chaudhry et al 2014). Similarly, also reported that removal of TPM dyes by live cells and dead cells of Penicillium simplicissimum involved amino, hydroxyl, phosphoryl, and nitro groups etc.…”

“…Currently, with the wide application of synthetic dyes, their e uents could cause severe damage to the environment. As one of the most important groups of synthetic dyes, triphenylmethane (TPM) dyes such as cotton blue (CB), crystal violet (CV), malachite green (MG) and methyl violet (MV) in textile, leather, cosmetic, pharmaceutical and paper industries poses a direct threat to the environment due to the toxic and carcinogenicity of their degradation products (Daneshvar et al, 2007;Chaudhry et al 2014; Barapatre et al 2017;Przystas et al 2018). As a consequence, effective removal of hazardous TPM dyes from the aqueous solutions as well as detoxi cation is crucial.…”