| Autor: |
Marovska, Gergana, Dushkova, Mariya, Angelova, Galena, Brazkova, Mariya, Brink, Hendrik, Haneklaus, Nils, Menkov, Nikolay, Slavov, Anton |
| Zdroj: |
Biomass Conversion & Biorefinery; Sep2024, Vol. 14 Issue 18, p22703-22716, 14p |
| Abstrakt: |
Lavender (L) and Rosa damascena (RD) industrial solid by-products were used as biodegradable adsorbents for the removal of the azo dye Acid Orange 7 from aqueous solutions. The equilibrium for the adsorption (1 g of adsorbent, 20 mL aqueous solution of dye, pH 7.05) occurred at the 60 min and at 100 mg/L initial concentration of azo dye. The adsorbed amount of Acid Orange 7 was 1.63 mg/g (81.50% removal efficiency) for L and 1.74 mg/g (87% removal efficiency) for RD at 293 K. The effectiveness of the adsorption increased decreasing the pH medium: for L at pH 1.5, the removal was 1.975 ± 0.08 mg/g (98.75%), and for RD at pH 3.5, it was 1.975 ± 0.08 (98.75%). The removal behavior for Acid Orange 7 fitted the Freundlich model and suggested a diffusion process related to physical adsorption. For the three investigated temperatures (293 K, 303 K, and 313 K) negative values for Gibb's free energy ΔG0 were observed revealing the spontaneous character of the adsorption processes. The observed decrease of ΔG0 (ranging from − 18 to − 21 kJ/mol) implies a physical nature of the adsorption. The post-adsorption L and RD residues were subjected to solid-state cultivation using the fungus Ganoderma resinaceum GA1M yielding mycelium-based biocomposites. The investigations revealed that the biocomposites were free from Acid Orange 7. The approaches presented here demonstrate that L and RD industrial by-products can be successfully applied for the adsorption of Acid Orange 7 while producing harmless mycelium-based biocomposites through solid-state fermentation using G. resinaceum GA1M. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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