A novel oxalated zero-valent iron nanoparticle for Pb(II) removal from aqueous solution: Performance and synergistic mechanisms

Oxyanion-modified zero valent iron with excellent pollutant removal performance

“…More surface-bound Fe( ii ) was able to promote Pb( ii ) reductive removal on OA-nZVI 53 and Cr( vi ) reductive removal on OA-ZVI via a single electron transfer pathway, with Cr( vi ) removal rate constant 20 times higher than that of ZVI. 45 Impressively, a high Cr( vi ) removal rate of OA-ZVI was maintained even after six consecutive Cr( vi ) removal experiments in simulated and real Cr( vi )-containing wastewater samples.…”

“…Oxyanions can form stable iron complexes with Fe( ii )/Fe( iii ), 40–43 and thus be able to change the structure and properties of ZVI for efficient pollutant removal. 38,44–54 Moreover, oxyanions used in oxyanion modification are more abundant and environmentally benign than those species used for other modification methods, like bimetallic modification and sulfidation, 25 allowing for tuning the properties of ZVI to remove different target pollutants with less environmental risks. Thus, oxyanion modification becomes one of the most cost-effective approaches with great potential to enhance the decontamination performance of ZVI.…”