Comments on 'Mechanism study of nitrate reduction by nano zero valent iron' by Hwang et al. [J. Hazard. Mater. (2010), 10.1016/j.jhazmat.2010.10.078]

摘要

In a recent article, Hwang et al. [1] reported on the mechanism of nitrate (NO_3~-) reduction by nanoscale metallic iron (nano-Fe°). A particular attention was paid to the fate of nitrogen species dur ing nitrate reduction. This article with 20 peer-reviewed references is very informative. However, the objective of the study is questionable as it challenges the state-of-the-art knowledge on the mechanism of aqueous contaminant removal in the presence of Fe~0 (e.g. in Fe~0/H_2O systems) [2-4]. The view that Fe~0 is a reducing agent has been challenged 3 years ago [2].