Stripping of volatile pollutants
Physico-chemical treatment of soluble pollution

The field of stripping, whose effectiveness will only be optimal in a well-defined pH zone, which can be very far from neutrality, concerns sulphurous products (hydrogen sulphide H₂S, sulphurous gases, sulphides...), nitrogenous products (dissolved ammonia NH₃, ammonium ions ${\text{NH}}_4^{+}$) and certain volatile organic materials (solvents, phenols, alcohols...).

Industrial waste likely to be treated by stripping comes from :

• the petrochemical industry (extraction of hydrogen sulfide and ammonia from acid waters and condensates);

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