Biogenic FeS promotes dechlorination and thus de-cytotoxity of trichloroethylene

Dehalogenation of α-hexachlorocyclohexane by iron sulfide nanoparticles: Study of reaction mechanism with stable carbon isotopes and pH variations

“…(Nie et al, 2020) recently showed that the degradation of trichloroethylene by biotic FeS was six time faster than its degradation by abiotic FeS. The higher reductive activity of the biogenic FeS detected by (Nie et al, 2020) was attributed to a higher monosulfide (HSion) content and to more structural Fe 2+ on the surface.…”

“…Previous studies have reported the capacity of FeS to reductively dehalogenate various halogenated organic pollutants, such as hexachloroethane (Butler and Hayes, 1998), trichloroethylene (Butler et al, 2013;He et al, 2010), γ-hexachlorocyclohexane (γ-HCH) (Liu et al, 2003) and hexabromocyclododecane (HBCD) (Li et al, 2016). (Nie et al, 2020) recently showed that the degradation of trichloroethylene by biotic FeS was six time faster than its degradation by abiotic FeS. The higher reductive activity of the biogenic FeS detected by (Nie et al, 2020) was attributed to a higher monosulfide (HSion) content and to more structural Fe 2+ on the surface.…”

Bacterial extracellular electron transfer: a powerful route to the green biosynthesis of inorganic nanomaterials for multifunctional applications

“…It has been widely demonstrated that the biological production of iron sulfides can occur as a consequence of dissimilatory reduction of diverse ferric iron (Fe 3+ ) by Shewanella spp., including both dissolved ions and insoluble minerals when they coexist with thiosulfate, sulfite or/and elemental sulfur [ 143 – 148 ]. To our best knowledge, S. oneidensis MR-1 [ 144 , 147 , 148 ], S. loihica PV-4[ 143 ] and S. putrefaciens CN32[ 146 ] have been documented capable of biosynthesizing nanostructured FeS under anaerobic conditions. The structure, size and reactive activity of these biogenic FeS are, to a great extent, dependent on the synthesis conditions.…”

“…HN-41 Extracellular Semiconductive and photoconductive [ 29 ] As 2 S 3 Nanofibers (diameter of 20–600 nm, length up to 150 μm) Shewanella sp. ANA-3 Extracellular – [ 142 ] FeS Nanosized colloids S. loihica PV-4 Extracellular Increased bioelectricity production [ 143 ] Nanowire clusters S. oneidensis MR-1 Extracellular Long-distance EET [ 144 ] Mackinawite S. oneidensis MR-1 Extracellular Accelerated dechlorination of trichloroethylene [ 147 ] NPs (30–90 nm) S. oneidensis MR-1 Extracellular Removal of aqueous Cr 6+ [ 148 ] NPs (~ 30 nm) S. oneidensis MR-1 Both extracellular and intracellular FeS-NPs biosynthesis coupling with naphthol green B biodegradation [ 149 ] Ag 2 S NPs (53.4 nm for wild-type strain, 27.6 nm for △mtrC-omcA strain) S. oneidensis MR-1 Extracellular Catalytic reduction of methylviologen [ 77 ] Monodis...…”

“…Biogenic FeS-NPs synthesized by Shewanella spp. have been reported to dramatically accelerate dechlorination of both carbon tereachloride and trichloroethylene by a factor of over five compared to the abiotic FeS [ 147 ].…”