Effect of Fomes fomentarius Cultivation Conditions on Its Adsorption Performance for Anionic and Cationic Dyes.

Laura M Henning,Aleksander Gurlo,Carsten Pohl,Tamara Nunez Guitar,Ulla Simon,Cekdar Vakifahmetoglu,Amanmyrat Abdullayev,Vera Meyer,Maged F Bekheet,Bertram Schmidt

doi:10.1021/acsomega.1c05748

Laura M Henning, Aleksander Gurlo + Show 8 more

Open Access

https://doi.org/10.1021/acsomega.1c05748

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Abstract

Lab-cultivated mycelia of Fomes fomentarius (FF), grown on a solid lignocellulose medium (FF-SM) and a liquid glucose medium (FF-LM), and naturally grown fruiting bodies (FF-FB) were studied as biosorbents for the removal of organic dyes methylene blue and Congo red (CR). Both the chemical and microstructural differences were revealed using X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, zeta potential analysis, and scanning electron microscopy, illuminating the superiority of FF-LM and FF-SM over FF-FB in dye adsorption. The adsorption process of CR on FF-LM and FF-SM is best described by the Redlich–Peterson model with β constants close to 1, that is, approaching the monolayer Langmuir model, which reach maximum adsorption capacities of 48.8 and 13.4 mg g–1, respectively, in neutral solutions. Adsorption kinetics follow the pseudo-second-order model where chemisorption is the rate-controlling step. While the desorption efficiencies were low, adsorption performances were preserved and even enhanced under simulated dye effluent conditions. The results suggest that F. fomentarius can be considered an attractive biosorbent in industrial wastewater treatment and that its cultivation conditions can be specifically tailored to tune its cell wall composition and adsorption performance.

Highlights

Industrial dye effluents from various industries such as textile, leather, plastic, food, pharmaceutical, cosmetics, or paper printing industries cause severe threats to the ecosystem when discharged into the environment.[1−4] Approximately 15% of the original dye is lost during the processing in the textile industry.[1,2] Dyes are not biodegradable
While F. fomentarius grown on a solid lignocellulose medium, referred to as Fomes fomentarius (FF)-SM, shows the lowest bulk density and a faint beige-to-yellow color, an increase in bulk density and color intensity can be observed for F. fomentarius grown on a liquid glucose medium, referred to as FF-LM
In accordance, scanning electron microscopy (SEM) images in Figure 1 reveal that the mycelium network of both laboratory-cultivated F. fomentarius samples FF-SM and FF-LM consist of loose and randomly packed hyphae with diameters of ca. 2−3 μm, whereas the mycelium network of trama FF-FB is composed of more aligned and densely packed hyphae with diameters of ca. 6−7 μm

Summary

■ INTRODUCTION

Industrial dye effluents from various industries such as textile, leather, plastic, food, pharmaceutical, cosmetics, or paper printing industries cause severe threats to the ecosystem when discharged into the environment.[1−4] Approximately 15% of the original dye is lost during the processing in the textile industry.[1,2] Dyes are not biodegradable. To understand the sorption capacities of the tinder polypore F. fomentarius and to provide a basis for their future optimization by genetic and cultivation means, a native strain was isolated from a dead tree trunk from the Brandenburg forest (Germany), and an axenic culture was obtained from it This fungal species is of interest as it is well-known in traditional medicine as a vital fungus and can be used for the production of wound-healing textiles as well as composite materials for the construction industry.[37,38] F. fomentarius grows well under laboratory conditions on different byproducts from agriculture and forestry including hemp, raps straw, and sawdust and could potentially become a future cell factory for the sustainable and customizable manufacturing of fungalbased materials exploited by different industries

■ RESULTS AND DISCUSSION

■ CONCLUSIONS

■ ACKNOWLEDGMENTS

■ REFERENCES