Multi-tiered distributions of arsenic in ironnanoparticles: Observation of dual redox functionality enabled by a core–shell structure

Abstract

Multi-tiered arsenic distributions within nanoscale zero-valent iron (nZVI) were observed upon reactions of nZVI with aqueous As(III) species, suggesting arsenite oxidation and reduction may occur in parallel at different sub-domains of the nanoparticles owing to the particle’s core–shell structure. New insights into arsenic remediation with iron nanomaterials are obtained.