FeCl3·6H2O (per analysis quality, Sigma–Aldrich) was chosen as a model pollutant representing inorganic contamination. Nitrobenzene (per analysis quality, Sigma–Aldrich) was chosen as model organic contaminant, and hydrogen peroxide (unstabilized 29–32%, Lach-Ner) was used for oxidation reactions. The selection of nitrobenzene and iron contaminants reflected practical needs of industrial project partners.