Verfahren zur Absorption von Stickoxiden aus Abgasströmen

摘要

The invention concerns a method of absorbing oxides of nitrogen from waste-gas streams produced, for instance, when metal workpieces are pickled in nitric acid. The invention is characterized in that an aqueous solution containing 0.2 to 2 wt % of hydrogen peroxide and 2 to 20 wt % of nitric acid is contacted with a substance and/or device which activates the hydrogen peroxide.