The process of bromate reduction by zero valent iron (Fe(0)) has been found
to be controlled by surface mediated reactions, which are strongly related to
the surface status. The effect of natural organic matter (NOM) on the bromate
reduction by Fe(0) was investigated to examine the interactions between
humic acid and the iron surface. Small decreases in the bromate reduction
were observed with simultaneous additions of humic acid and bromate. The
adsorbed humic acid on the iron surface was found to compete with bromate
reduction by acting as a passive film between inner Fe(0) and bromate.
Therefore, the effect of humic acid was more significant by 24-hour presoaking
Fe(0) with humic acid. The complexation of humic acid with active
ferrous ions (Fe(II)) in aqueous phase was found to affect bromate reduction
by Fe(II). In this study, functional groups, OH<sup>-</sup> and COO<sup>-</sup> in humic acid
detected by FTIR spectroscopy were found to complex with irons, and
consequently led to the dissolution of iron oxides and irons. Includes 30 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 320 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 12 |
| Published : | 06/17/2004 |
