Porous heat-treated fungal biomass: preparation, characterization and application for removal of textile dyes from aqueous solutions

Ghariani, Bouthaina; Hadrich, Bilel; Louati, Ibtihel; Mtibaà, Rim; Daâssi, Dalel; Rodríguez‐Couto, Susana; Mechichi, Tahar

doi:10.1007/s10934-019-00746-6

Cited by 8 publications

(1 citation statement)

References 37 publications

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“…These enzymes are found in plants [44], bacteria [45], insects [46], and fungi [43,47]. Fungal laccases, especially those from white-rot fungi, are among the best-described and widely-used enzymes in various biotechnological applications from pharmaceuticals [48] to cosmetics [49], pulp bleaches [50], food [51], bio-detergents [52,53] and textile dye decolorization [54][55][56]. However, laccases are unable to directly oxidize complex compounds that have a higher redox potential than laccases or steric hindrance preventing access to the catalytic site of the enzyme [57,58].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Decolorization of the Reactive Black 5 by a Laccase-like Active Cell-Free Supernatant from Coriolopsis gallica

et al. 2022

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The textile industry generates huge volumes of colored wastewater that require multiple treatments to remove persistent toxic and carcinogenic dyes. Here we studied the decolorization of a recalcitrant azo dye, Reactive Black 5, using laccase-like active cell-free supernatant from Coriolopsis gallica. Decolorization was optimized in a 1 mL reaction mixture using the response surface methodology (RSM) to test the influence of five variables, i.e., laccase-like activity, dye concentration, redox mediator (HBT) concentration, pH, and temperature, on dye decolorization. Statistical tests were used to determine regression coefficients and the quality of the models used, as well as significant factors and/or factor interactions. Maximum decolorization was achieved at 120 min (82 ± 0.6%) with the optimized protocol, i.e., laccase-like activity at 0.5 U mL−1, dye at 25 mg L−1, HBT at 4.5 mM, pH at 4.2 and temperature at 55 °C. The model proved significant (ANOVA test with p < 0.001): coefficient of determination (R²) was 89.78%, adjusted coefficient of determination (R²A) was 87.85%, and root mean square error (RMSE) was 10.48%. The reaction conditions yielding maximum decolorization were tested in a larger volume of 500 mL reaction mixture. Under these conditions, the decolorization rate reached 77.6 ± 0.4%, which was in good agreement with the value found on the 1 mL scale. RB5 decolorization was further evaluated using the UV-visible spectra of the treated and untreated dyes.

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Section: Introductionmentioning

confidence: 99%

Optimization of the Decolorization of the Reactive Black 5 by a Laccase-like Active Cell-Free Supernatant from Coriolopsis gallica

et al. 2022

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Evaluation of vat blue removal by Aspergillus niger using scanning electron microscopy and glucose oxidase enzyme activity

Lira Pérez,

Figueroa Estrada,

García Rivero

et al. 2024

Vietnam Journal of Chemistry

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The use of fungi to reduce dye removal in water from diverse industries can be an efficient option for solving environmental problems. However, the mycoremediation processes involved in color removal are unknown. In this article, Aspergillus niger CDBB‐H‐175 was applied for vat blue discoloration (DC). Hence, inactive biomass by two methods (metabolic inhibitor and heat) and active biomass were studied by scanning electron microscopy and enzyme activities to determine the vat blue DC. When using active biomass, 62% of DC, glucose oxidase (GOX) enzyme activity, 1.19 U/mL and 1.43 mg/L of H2O2 were obtained. It was observed that 68% of DC was due to the degradation process and 32% was due to biomass sorption. When the biomass was inactivated with sodium azide, DC increased by 90% (1.45‐fold), low GOX activity (0.138 U/mL), and H2O2 (0.25 mg/L) were detected. High DC might be due to a high dye sorption in hyphae, since an increase in the thickness and morphology of the hyphae were observed by SEM. Inactivated biomass through heating, showed a 69.5% of DC, where 0.01 U/mL GOX and 0.25 mg/L H2O2 were reached, demonstrating that inactivation of A. niger biomass by sodium azide can be considered as an alternative treatment for colored wastewater.

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Ionic Dye Removal Using Solvent-Assisted Ionic Micellar Flocculation

et al. 2022

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Porous heat-treated fungal biomass: preparation, characterization and application for removal of textile dyes from aqueous solutions

Cited by 8 publications

References 37 publications

Optimization of the Decolorization of the Reactive Black 5 by a Laccase-like Active Cell-Free Supernatant from Coriolopsis gallica

Optimization of the Decolorization of the Reactive Black 5 by a Laccase-like Active Cell-Free Supernatant from Coriolopsis gallica

Evaluation of vat blue removal by Aspergillus niger using scanning electron microscopy and glucose oxidase enzyme activity

Ionic Dye Removal Using Solvent-Assisted Ionic Micellar Flocculation

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