WHAT IS THE HALF-LIFE OF OZONE?
For the purification of water and air, its needed to produce ozone on-site. Because of its short half-life, ozone will decay soon when produced. The half life of ozone in water is about 30 minutes, which means that every half hour the ozone concentration will be reduced to half its initial concentration. For example, when you have 8 g/l, the concentration reduces every 30 minutes as follows: 8; 4; 2; 1; etc. In practice the half-life is shorter because a lot of factors can influence the half-life. Factors are temperature, pH, concentration and concentration and sort solutes. Because ozone reacts with all kinds of components, the concentration ozone will reduce quickly. When most of the components are oxidized, the residual ozone will remain, and the concentration ozone will reduce less fast.
Ozone decays rapidly and must be produced on-demand at the site of application. Theoretically, the half life of ozone in water is approximately 30 minutes, which means that every half hour the ozone concentration will be reduced to half its initial concentration. For example, if you start with ozone in solution at 1 part per million (ppm), the concentration reduces by one-half every 30 minutes as follows: 0.5 ppm, 0.25 ppm, 0.13 ppm, 0.06 ppm etc. In practice, many factors can influence the half-life and result in shorter half-life in use. For example, temperature, pH, agitation, and the concentration of oxidizable substances in the water affect ozone stability and concentration.
