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Article | REF: W2701 V1

Oxidation and reduction applied to water treatment - Oxygen, chlorine and derivatives

Authors: Sylvie BAIG, Pierre MOUCHET

Publication date: August 10, 2008

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1. Oxygen – Aeration practice

1.1 General information on oxygen and its dissolution in water

Oxygen in air is the cheapest of all oxidizers, but it's also one of the weakest. By direct chemical action, it can only react with certain easily oxidizable inorganic elements, such as the Fe 2+ ion and, at high pH and in the presence of a catalyst (e.g. MnO 2 ), the Mn 2+ ion. On the other hand, under the influence of specific bacteria, it can enzymatically oxidize numerous mineral elements (Fe 2+ , Mn 2+ , NH 4 –N, S 2– ...

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