| 摘要 |
<p>The invention concerns a method for reducing in nitrogen and/or ammonia content, nitrates present in an acid aqueous effluent, using a hydrogenation reaction in the presence of nitrite ions and a heterogeneous catalyst, the effluent having the following characteristics: nitrate content ranging between 0.05 and 20 wt. % of the effluent, global acid content more than 20 wt. % of the effluent; the effluent is neutralised before the reaction so that the pH of the reaction medium at the end of the reaction, if it is carried out with interruption, or during the reaction if it is carried out without break, is not less than 3.</p> |
