Oxidation and reduction applied to water treatment — Ozone – Other oxidants – Advanced oxidation – Reducing agents

Oxidation-reduction phenomena are involved in all areas of water treatment technology. Their general principles were outlined in a first article (Oxidation and reduction applied to water treatment – General principles). A second article (Oxidation and reduction applied to water treatment – Oxygen, chlorine and derivatives) was devoted to the most traditional oxidants.

This article examines :

• other oxidants (including ozone);

• advanced" oxidation processes, combining ozone and/or hydrogen peroxide and/or UV rays and/or catalysts... ;

• reducers, commonly used but more limited than oxidizers.

The main applications and implementation methods of oxidation-reduction in water technologies will be developed in a final article in conjunction with the articles in the Environment section:

• Water treatment before use. Dissolved substances [G 1 171] ;

• Water treatment before use. Channel and applications [G 1 172] ;

• Physico-chemical treatment of soluble pollution [G 1 271] ;

• Tertiary treatment of industrial effluents [G 1 310] ;

• Water pollution control. High-performance finishes [G 1 330] .