A new whole-cell biocatalyst for sulfur dioxide filtering and degradation. (October 2020)

• Record Type: Journal Article
• Authors: Haghighatian, Sara; Mazarei, Elham; Doroodmand, Mohammad Mahdi; Klein, Axel; Memarpoor-Yazdi, Mina
• Is Part Of: Bioresource technology. Volume 314(2020)
• Publication Date: 2020-10
• Subjects: Magnetotactic bacteria -- Biofilter -- Sulfurous pollutants -- Pseudo-first and second-order kinetics models; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2020.123755
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A high potential SO2 biofilter was designed using magnetotactic bacteria. Removal efficiency of the designed biofilter was obtained more than 99% The designed biofilter was able to degrade SO2 up to 22281 mg m −3 . Electrochemical performance of MTB reduced the ham of H + ions during SO2 biofiltration. Abstract: In this study, the interaction of the magnetotactic bacterium with sulfite compounds and their potential to degrade SO2 was investigated using cyclic voltammetry (CV), molecular emission cavity analysis (MECA) and ion-exchange chromatography (IEC). This biofilter was able to degrade SO2 up to 22281 mg m −3 by disproportionation reaction and the formation of S 2− and SO4 2− with ≥99% efficiency. Designed biofilter was able to restart the initial performance at least after seven cycles if it was used at 14-day intervals. According to theoretical studies, the value of mean free energy (E) obtained using the Dubinin-Radushkevich isotherm model was 0.02 kJ mol −1, which is in the range expected for physical adsorption. Designed biofilter can be considered as a powerful tool to degrade SO2 in diverse urban and industrial centers.