French swimming question

[Krill]

Don;t forget that it isn;t just the swimmers who would have to cope with the ozone, the workers at the pool are protected by COSHH and the equivalents.

[Kuciwalker]

Chlorine byproducts found in swimming pools are linked to higher incidences of asthma, lung damage, stillbirths, miscarriages and bladder cancer, according to credible research conducted in the U.S., Canada, Norway, Australia and Belgium.

One researcher noted that 10-year-old children spending an average of 1.8 hours per week in an indoor swimming pool environment suffered lung damage she would expect to see in an adult smoker.

...

I've spent far more than 2 hours a week in chlorinated pools since I was six. I'm pretty sure my lungs are all right...

[Asher]

This thread is surprisingly informative. A+ to Apolyton.

[Krill]

Originally posted by Kuciwalker

Chlorine byproducts found in swimming pools are linked to higher incidences of asthma, lung damage, stillbirths, miscarriages and bladder cancer, according to credible research conducted in the U.S., Canada, Norway, Australia and Belgium.

One researcher noted that 10-year-old children spending an average of 1.8 hours per week in an indoor swimming pool environment suffered lung damage she would expect to see in an adult smoker.

...

I've spent far more than 2 hours a week in chlorinated pools since I was six. I'm pretty sure my lungs are all right...

It's from Canada, what sort of research do you expect to see from them?

[Dry]

I think we are not talking about the same thing here.
Health agencies warn people against ozonators who are supposed to clean your air (air conditionning) with ozone.
These can be harmfull, because the ozone is injected in the air you are meant to breathe.
We are talking about ozone in the water (most swimmers do not inhale the water).

The only question is how much of ozone that is in the water escapes before it oxydise what it is supposed to (as compared to chlorine).
I'm no expert, so I can't tell.

But ozonators indeed are much more questionable.

[Dry]

Ok, I googled a bit and it seems the ozone is only used in the filtering/purifying circuit only. The ozone in the water is removed before it goes back in the pool.
'ozone in the water should not be measurable (less than 0.1 mg/l)'. That is the UV part of the process: to remove excessive ozone before it flows back in the pool.

[Krill]

Under standard conditions, ozone is a pretty powerful oxidising agent (for comparison, H2O2 +2H+ + 2e- -> 2H2O, e0 = +1.77v, O3 + 2H+ + 2e- -> O2 + H2O, e0 = 2.07v). I don't won't to spill peroxide on my skin because it'll be quite painful (at the very least itch), so I sure as hell don;t want to go diving in a pool and swim in ozone. Even if there is only a little ozone, that which comes into contact with the skin can still cause dryness.

The best question to ask, and I can't be bothered to go and look, is to see what the concentration of ozone in the water is supposed in swimming pools and compare that to health limits throughout the world.

[Kuciwalker]

I still don't see why the ozone will dissolve in the water rather that just immediately disassociating into O2 and OH-.

[Krill]

And I woulndn't expect a compsci to understand why, either.

[Kuciwalker]

That's why I'm asking a chemist.

[Dry]

Residual ozone becomes apparent to sensitive humans in the range of 0.01 - 0.03-ppm, or well below the permissible levels for continuous exposure.

As long as you nobody smell it, you are below 0.01 ppm.
And this are the norms: no ozone should be detectable.

You are more in danger in a photocopy room, or next to a UV lamp than you are with your nose above water that has been treated by ozone.

[Dry]

Originally posted by Krill
Under standard conditions, ozone is a pretty powerful oxidising agent (for comparison, H2O2 +2H+ + 2e- -> 2H2O, e0 = +1.77v, O3 + 2H+ + 2e- -> O2 + H2O, e0 = 2.07v). I don't won't to spill peroxide on my skin because it'll be quite painful (at the very least itch), so I sure as hell don;t want to go diving in a pool and swim in ozone. Even if there is only a little ozone, that which comes into contact with the skin can still cause dryness.

Again, ozone is not put in the pool, as is chlorine, it is only used in the filtering/sanitizing process.
Unlike chlorine, you, the swimmer, do not get in contact with ozone.
And indeed, it is a powerfull oxydiser. That is precisely why it is used.

[Krill]

Originally posted by Dry

Again, ozone is not put in the pool, as is chlorine, it is only used in the filtering/sanitizing process.

Is that a claim saying that there is no chlorine in the pool when chlorine is used in conjuction with ozone?

[rah]

Originally posted by Supr49er


Well, when I was a kid, all the guys at the indoor pool at the YMCA swan nude.

Back in the 60's and 70's in was normal for kids in high school PE classes to swim naked. When I tell those tales to the younger generation they stare at me with looks of horror. We thought nothing of it at the time.

[Asher]

Originally posted by rah


Back in the 60's and 70's in was normal for kids in high school PE classes to swim naked. When I tell those tales to the younger generation they stare at me with looks of horror. We thought nothing of it at the time.

Bring back the 60s and 70s. Damn, I was born a few decades late...

Nowadays they don't even shower in gym. Kids are so smelly and dirty.