Project description:The study aimed to explore the potential of bacterial biodegradation as a solution to the global problem of plastic pollution, specifically targeting polyethylene (PE), one of the most common types of plastic. The goals of the study were to isolate a bacterial strain capable of breaking down PE, identify the key enzymes responsible for the degradation process, and understand the metabolic pathways involved.

2023-10-24 | PXD044483 | Pride

Factors affecting antimonate bioreduction by <i>Dechloromonas</i> sp. AR-2 and <i>Propionivibrio</i> sp. AR-3.

Project description:The microbial reduction of antimonate (Sb(v)) to antimonite (Sb(iii)), which forms insoluble Sb compounds, is a promising approach to remove antimony (Sb) from wastewater. Among the bacterial strains capable of reducing Sb(v) via anaerobic respiration that have been isolated to date, Dechloromonas sp. AR-2 and Propionivibrio sp. AR-3 are promising agents because they can grow aerobically and reduce Sb(v) under both anaerobic and microaerobic conditions. In this study, the effects of temperature, pH, electron donors, and coexisting electron acceptors on Sb(v) reduction and Sb removal by strains AR-2 and AR-3 were investigated to assess the usefulness of the strains in practical Sb treatment scenarios. Efficient Sb(v) reduction and removal by the two strains occurred over a relatively wide temperature range (15-35 °C) and neutral pH (6-7). In contrast, the carbon sources usable by these strains as electron donors for Sb respiration were limited to simple fatty acids such as acetate and lactate. Although strain AR-2 used nitrate and AR-3 used nitrate and arsenate as electron acceptors for anaerobic respiration in addition to Sb(v), the co-presence of other electron acceptors did not inhibit Sb(v) reduction. These results suggest that strains AR-2 and AR-3 can be potentially used in the practical treatment of Sb(v)-containing wastewater.Supplementary informationThe online version contains supplementary material available at 10.1007/s13205-021-02703-0.

| S-EPMC7943692 | biostudies-literature

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