The article presents the results of experimental studies to study the effect of the hydrogen index of the medium on the iron-catalytic oxidation of hydrogen sulfide with air oxygen in a reactor with an ultrafiltration separator in the pH range from 6.0 to 10.0 at Fe(OH) catalyst doses3 – 100, 500 and 1000 mg/dm3. The results obtained make it possible to optimize the operation of one of the modern technological solutions in the field of preparation of ground hydrogen sulfide waters based on the method of iron-catalytic oxidation and ultrafiltration.

Keywords: hydrogen sulfide, iron-catalytic oxidation, air oxygen, iron hydroxide, membrane separation, ultrafiltration

The results of studies of the kinetics of the iron-catalytic oxidation of hydrogen sulfide by atmospheric oxygen in a reactor with a membrane separator are presented. The studies were carried out on a laboratory experimental complex. The dependences were obtained experimentally showing the effect of the catalyst dose - Fe (OH) 3¬, the pH of the medium, and the contact time of the water being purified with the reaction medium on the effect of water purification from hydrogen sulfide.

Keywords: hydrogen sulfide, iron catalytic oxidation, air oxygen, iron hydroxide, membrane separation, ultrafiltration

A review of odorizing substances in natural waters is carried out. The stages at which odorizing substances can be introduced into water are considered. The characteristic of odorizing substances introduced at each stage of water treatment is given. The sources of drinking water odorants are systematized in relation to the stages of water treatment and by type of origin. Methods for determining odorants in raw water are reviewed. The threshold sensations, the type of smell and the chemical formula of some odorizing substances are given.

Keywords: natural water treatment, water deodorization, odorants, water treatment, carbohydrate water, surface water sources