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Recent studies have demonstrated that the rate at which Fe(II)-Fe(III) oxyhydroxide systems catalyze the reduction of reducible contaminants, such as 4-chloronitrobenzene, is well correlated to their thermodynamic reduction potential. Here we confirm this effect in the presence of Fe(III) oxyhydroxide phases not previously assessed, namely ferrihydrite and nano-goethite, as well as Fe(III) oxyhydroxide...
In this study we examine the kinetics of the Fe(II)-accelerated conversion of ferrihydrite to goethite using quick-scanning X-ray absorption spectroscopy (XAS) and measure the associated changes in oxidation–reduction potential (ORP). The quick-scanning method, where full scans up to k=15Å −1 were achieved in around 20s, provided improvements over traditional XAS methods, particularly with...
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