A controllable reduction-oxidation coupling process for chloronitrobenzenes remediation: From lab to field trial

Fabricating Amorphous Zero-Valent Iron for Cr(VI) Efficient Reduction: Unveiling the Effect of Ethylenediamine on Physicochemical Properties

“…In the field of water treatment and catalysis, many studies are being conducted on the application of new environmentally functional materials such as graphene, − activated carbon, , and zero-valent iron (ZVI). − Among these novel materials, ZVI has been widely used in the repair of heavy-metal contamination in the past two decades due to its superior activity. , Generally, ZVI is divided into crystalline zero-valent iron (CZVI) and amorphous zero-valent iron (AZVI). Compared with CZVI, AZVI has a stronger electron transfer capacity.…”

“…7−9 Among these novel materials, ZVI has been widely used in the repair of heavy-metal contamination in the past two decades due to its superior activity. 10,11 Generally, ZVI is divided into crystalline zerovalent iron (CZVI) and amorphous zero-valent iron (AZVI). Compared with CZVI, AZVI has a stronger electron transfer capacity.…”

Oxyanion-modified zero valent iron with excellent pollutant removal performance

“…30–34 Subsequently, H 2 O 2 reacts with Fe( ii ) generated during the ZVI oxidation, initiating the Fenton reaction to produce highly powerful hydroxyl radicals (˙OH, 2.80 V), facilitating the oxidative transformation of organic pollutants. 35,36 Apparently, the iron oxide shell plays a vital role in these decontamination processes by affecting the electron transfer from the Fe(0) core to its outer shell toward pollutant removal, mass transfer of pollutants, interaction of target pollutants or non-target reactants with ZVI, and ultimately the decontamination process. 37 During the decontamination process, the naturally-occurring iron oxide shell functions as a “double-edged sword”, 38 preventing the Fe(0) core from over-oxidation under ambient conditions and providing ZVI with appreciable properties for coordinative adsorption of pollutants, especially heavy metals.…”

Degradation of Nitrobenzene by Mackinawite through a Sequential Two-Step Reduction and Oxidation Process

“…In practice, many aromatic compounds (e.g., tetrabromobisphenol A and ArNO 2 ) are difficult to completely degrade through reduction or oxidation alone. , Therefore, combining reduction and oxidation could be a more effective approach for removing these refractory compounds. For instance, this approach has been successfully applied to degrade tetrabromobisphenol A using Fe–Ag bimetallic nanoparticles and sulfidated nanoscale zerovalent iron since the reduction products formed in the first step can be effectively degraded in the subsequent oxidation process. , Zhang et al recently revealed that the combination of zerovalent iron and H 2 O 2 could offer a highly controllable reduction–oxidation coupling process for in situ chloronitrobenzene degradation . In view of the superior ability of FeS in contaminant removal through reduction or oxidation, it is reasonable to speculate that the sequential reduction–oxidation process could be effective in achieving complete mineralization of aromatic compounds in FeS systems.…”

“…23,25 Zhang et al recently revealed that the combination of zerovalent iron and H 2 O 2 could offer a highly controllable reduction−oxidation coupling process for in situ chloronitrobenzene degradation. 26 In view of the superior ability of FeS in contaminant removal through reduction or oxidation, it is reasonable to speculate that the sequential reduction−oxidation process could be effective in achieving complete mineralization of aromatic compounds in FeS systems. However, the oxidizing efficiency may be hindered due to the competition of FeS itself for • OH.…”