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Ozone Fallacies

We have heard them all. Now it's time we set the record straight. Below is a list of a few ozone fallacies we have heard over the years.

"Ozone will oxidize my metal pipes!"

This claim conjures an image of ozonated water running through pipes and when you come in the next morning, they are rusted through. This is not the case. pH level has more effect on corrosion rates of metals than most industry accepted dissolved ozone levels. While a powerful oxidizer, ozone has minimal effect on corrosion rates. Iron pipes that carry ozone gas, while not recommended, will last for months, or years, before any significant corrosion is present. For ozonated water, iron pipes will oxidize faster than water without ozone, but the pipes can last for years before needing replacement.

Ozone Solutions recommends the use of ozone approved materials. Iron pipes are not ideal but they will not degrade within a few days or even weeks as most people would have you believe. The same is true for most rubber seals.

"The sky is blue because of ozone."

Okay, this one is not related to our business, but we have heard it mentioned before so we will address it. While ozone is a blue gas, the sky is blue for a very different reason.

The blue color of the sky is due to Rayleigh scattering. Blue light has a shorter wavelength than the other "rainbow colors". This blue light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue.

So the next time your kid asks "Why is the sky blue?" you will have the answer!

Ozone does not have any residual.

This one is also false, but clarification is needed. Ozone has an extremely short half-life. This short half-life makes it very reactive and excellent at killing pathogens. In very clean water, ozone can last for several hours. In most food processing applications, ozone half-life is anywhere from 10-20 minutes. For wastewater applications, the ozone residual is dependent on the organic loading with high organic loading resulting in short ozone half-life.

"Ozone is Explosive" - False

This statement is also false but clarification is needed. For ozone concentrations produced by commercial and industrial grade ozone generator, ozone is NOT explosive. We have been working with ozone for 15 years not heard one instance where ozone caused an explosion. Believe us that if there ever was an explosion, it would make the front page of chemical companies newsletters for the next 10 years.

Research by Kunihiko Koike and Masaharu Nifuku in Japan states that ozone can be made to explode at very high (greater than 10% by wt.) and very low pressures (less than 10 Torr). Note that these pressures not not used anywhere in industry as they are not practical. 10 Torr is essentially in outer space. (Sea level is 760 Torr.)
You can learn more at this link: www.iitk.ac.in/che/jpg/papersb/full%20papers/K-106.pdf

Last Updated: July 3, 2012

The above information is from http://www.OzoneSolutions.com and is copyrighted by Ozone Solutions Inc.
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