Reduction of Chromium(VI) mediated by zero-valent magnesium under neutral pH conditions

Experimental Analysis and Modeling of Nitrate Removal through Zero-Valent Magnesium Particles

“…Therefore, there is a need to identify low cost, abundant, readily available, non-toxic reactive materials that are able to efficiently remove pollutants under ambient conditions. In this regard, zero-valent Mg (ZVM) represents a valid reductant for potential applications in the treatment of aqueous solutions [4,[29][30][31][32]. Indeed, ZVM is an environmentally friendly metal, which is characterized by a higher reduction potential (−2.363 V) compared to Fe 0 (−0.44 V) [4].…”

“…In addition to its superior reactivity with respect to ZVI, Mg 0 shows many other profitable aspects. In particular, in ZVM applications, surface passivation phenomena are less marked as a consequence of the higher solubility of magnesium corrosion products [4,29,30]. These reaction products (Mg 2+ compounds), in any case, are not hazardous to water systems, do not cause health problems and can be easily removed [29,30].…”

“…In particular, in ZVM applications, surface passivation phenomena are less marked as a consequence of the higher solubility of magnesium corrosion products [4,29,30]. These reaction products (Mg 2+ compounds), in any case, are not hazardous to water systems, do not cause health problems and can be easily removed [29,30]. Furthermore, zero-valent magnesium can be applied under both aerobic and anaerobic conditions [29,30].…”

Catalytic role of Cu(II) in the reduction of Cr(VI) by citric acid under an irradiation of simulated solar light

“…In recent years, a number of chemical reductants, including ferrous iron (Seaman et al, 1999;Fendorf and Li, 1996;Buerge and Hug, 1997), zerovalent iron (Puls et al, 1999;Melitas et al, 2001;Zhou et al, 2008), reduced sulfur compounds (Thornton and Amonette, 1999;Lan et al, 2005Lan et al, , 2006, organic compounds Palmer, 1995, 1996a;Deng and Stone, 1996) and others (Xu et al, 2004Guo et al, 2012;Lee et al, 2013) have been utilized to convert Cr(VI) into Cr(III). Among these reductants, Fe(II) is considered to be most feasible and efficient for reducing Cr(VI).…”

Quantifying the efficiency and selectivity of organohalide dechlorination by zerovalent iron

“…A compelling example of this is contaminant reduction with metals that are even more strongly reducing than ZVI, namely, zero-valent zinc (ZVZ) [89][90][91][92] and zero-valent magnesium (ZVMg). [93][94][95] The reduction of water by ZVZ and ZVMg is much more favorable than ZVI, so the HER is likely to compete more strongly with contaminants for electrons from the metal, making efficiency and selectivity even greater issues for practical applications of these reductants. In some respects, ZVZ (and probably also ZVMg) is an even better example of how operational factors inuence efficiency and selectivity because the passivation of these metals can be much more complete than with ZVI, so the rates of contaminant and water reduction and the associated electron efficiencies are likely to vary greatly with conditions that affect the passivation of these metals.…”