Degradation of a leather-dye by the combination of depolymerised wood-chip biochar adsorption and solid-state fermentation with Trametes villosa SCS-10

Abstract

Adsorption into biochar-derived materials and mycoremediation are promising technologies for removing dyes from solid and liquid matrices. This study presents a combined treatment with adsorption into wood-chip biochar and mycodegradation under solid-state fermentation by Trametes villosa for removing the leather-dye Acid Blue 161. In the first stage, untreated wood-chip biochar, NaOH–depolymerised biochar and KMnO4–depolymerised biochar were assessed for their dye removal efficiency by adsorption. KMnO4–depolymerised biochar exhibited the highest adsorption (85.1 ± 1.9%) after 24 h of contact. KMnO4–depolymerisation modified some physical and chemical properties on the untreated wood-chip biochar, increasing the surface area (50.4 m2 g–1), pore size (1.9 nm), and presence of surface functional groups. Response surface methodology coupled with a Box–Behnken design was used to optimise the AB161 adsorption into the KMnO4–depolymerised biochar. The optimised conditions, pH 3.0, dye concentration 100 mg L–1 and sorbent dosage 2 g L–1, led to a higher dye removal efficiency by adsorption (91.9 ± 1.0%). In a second stage, the wood-chip biochar supplemented with nutrients (1% malt extract and 0.5% peptone) was employed as a solid matrix for growing T. villosa and regenerating the dye-saturated material. After 15 days, T. villosa was able to grow (86.8 ± 0.8%), exhibit laccase activity (621.9 ± 62.3 U L–1), and biodegrade (91.4 ± 1.3%) the dye adsorbed into the KMnO4–depolymerised biochar. Finally, the mycoregenerated biochar was reutilised in a new cycle of adsorption reaching 79.5 ± 2.0% of dye removal efficiency by adsorption. This study revealed the potential of the combined treatment and is an initial assessment for developing commercial alternatives for treating leather industry wastewaters.

Decolorization of Textile Azo Dye via Solid-State Fermented Wheat Bran by Lasiodiplodia sp. YZH1

“…Laccase activity expressed by Lasiodiplodia sp. YZH1 under SSF conditions of WB (6.2 U/mL) was higher than that expressed by Trametes villosa in SSF of wood chip biochar (0.7 U/mL) [49] and Trametes sp. in SSF of cassava residue (0.15 U/mL) [63].…”

“…Fungal growth was recorded every 24 h by analyzing photographic records using the image-processing software Image J ® v. 1.53 (National Institutes of Health, Bethesda, MD, USA) [49,[52][53][54]. The growth of the fungus was described as a fungal growth area (%) and calculated using the following equation:…”

“…Dye removal using inoculation of fungal strains in agricultural wastes under solidstate fermentation conditions has previously been extensively reported [47][48][49]. However, there is little information available on the effect of SSF of agricultural wastes on dye removal efficiency in aqueous solutions.…”

Synthesis optimization and adsorption modeling of biochar for pollutant removal via machine learning

“…Moreover, thanks to its low cost, biochar is gradually becoming a popular adsorbent (Boraah et al 2022;Alsawy et al 2022;. Biochar could be applied to remove many kinds of pollutants, such as organic pollutants represented by antibiotics (Masrura et al 2022), pesticides (An et al 2021), dyes (Choudhary et al 2020;Ortiz-Monsalve et al 2020) and drugs (Jung et al 2015) and inorganic pollutants represented by arsenic (Cha et al 2021), cadmium (Tyagi 2022;Liu et al 2021b), chromium, lead (Din et al 2021;Lee et al 2019), copper and nickel (An et al 2019).…”

Aminated Polyacrylonitrile Nanofiber Membranes for the Removal of Organic Dyes

“…Dyestuffs are classified as anionic, cationic, and amphoteric based on their ionic nature. In the traditional leather dyeing process, direct dyes are widely used in dyeing tanned leather. − The discharge of dyes into water bodies endangers water quality and water supply due to their non-degradable, toxic, and cumulative nature. The high chromaticity of dyes not only causes damage to aquatic organisms but also affects humans by producing carcinogenic and mutagenic effects; therefore, it is crucial to develop effective technologies to remove toxic dyes from the aqueous environment. − Currently, many methods such as adsorption, ion-exchange, biofilm technology, , and advanced oxidation processes have been developed for treating dye wastewater.…”