Reduction pathway and mechanism of chloronitrobenzenes synergistically catalyzed by bioPd and Shewanella oneidensis MR-1 assisted by calculation

Heterogeneous Reduction of 2-Chloronitrobenzene by Co-substituted Magnetite Coupled with Aqueous Fe2+: Performance, Factors, and Mechanism

“…Chlorinated nitrobenzenes (CNBs) are used primarily as important intermediates in the manufacture of explosives, pesticides, drugs, rubber, etc. 1 With high toxicity, bioaccumulation, and strong resistance to biodegradation, CNBs are easily accumulated in sediments and soils, which brings great threat to humans and wildlife. 2,3 The nitro and chlorine groups of CNBs with pronounced electron-withdrawing capacity decrease the density of the electron cloud around aromatic rings, which makes the benzene ring difficult for oxygenase to attack.…”

“…Chlorinated nitrobenzenes (CNBs) are used primarily as important intermediates in the manufacture of explosives, pesticides, drugs, rubber, etc . With high toxicity, bioaccumulation, and strong resistance to biodegradation, CNBs are easily accumulated in sediments and soils, which brings great threat to humans and wildlife. , The nitro and chlorine groups of CNBs with pronounced electron-withdrawing capacity decrease the density of the electron cloud around aromatic rings, which makes the benzene ring difficult for oxygenase to attack. , Under anaerobic conditions, however, nitro functional groups readily succumb to electrophilic attack and, subsequently, induce the reduction of CNBs into their corresponding anilines, the less harmful and more biodegradable compounds. − This makes reductive transformation the predominant degradation pathway for CNBs in natural matrices.…”

Biotechnological synthesis of Pd-based nanoparticle catalysts

“…Bio-Pd can simply be added to liquid phase reactions as a suspension catalyst, for example to catalyse the reduction of various nitroaromatic compounds. 35,129,200,214 However, long term storage of bio-Pd containing cell suspensions has been shown to result in Pd leaching from the cell. 215 The preparation method of Mackaskie et al involves washing bio-Pd with acetone before air drying, and grinding into a ne powder.…”

Rediverting Electron Flux with an Engineered CRISPR-ddAsCpf1 System to Enhance the Pollutant Degradation Capacity of Shewanella oneidensis

“…Extracellular respiratory bacteria (ERB) have evolved a unique extracellular electron transfer (EET) mechanism to thrive in anaerobic environments by respiring on diverse extracellular electron acceptors. − ERB play important roles in pollutant degradation, − energy harvesting, , chemical production, , and environmental remediation. , Various ERB, including Shewanella spp., Geobacter spp., Pseudomonas spp., and Listeria spp., have been identified from different habitats and characterized for their EET pathways. One of the most intensively studied ERB model bacteria is Shewanella oneidensis MR-1 .…”