Oxygen, I need a chemist!

[jontysafe]

Hello science-mongers. I`m looking for a pH (!) stable slow release oxygen compound. Currently working with Calcium Peroxide but it`s not stable at lower pH of around 6 and gives off H202 instead of sustanined O2, lime and H20. Any ideas?

[Shaolin]

jontysafe said:

Hello science-mongers. I`m looking for a pH (!) stable slow release oxygen compound. Currently working with Calcium Peroxide but it`s not stable at lower pH of around 6 and gives off H202 instead of sustanined O2, lime and H20. Any ideas?

Don't know if it might be of use, but my sterlizing solution for my contact lenses is hydrogen peroxide and there's a piece of quite slow catalyst metal in the bottom of the container, you could maybe adapt this? Depends how hardcore scientific it is I suppose, though I'm guessing you'd know how to if it was.

[jontysafe]

Shaolin said:

jontysafe said:

Hello science-mongers. I`m looking for a pH (!) stable slow release oxygen compound. Currently working with Calcium Peroxide but it`s not stable at lower pH of around 6 and gives off H202 instead of sustanined O2, lime and H20. Any ideas?

Don't know if it might be of use, but my sterlizing solution for my contact lenses is hydrogen peroxide and there's a piece of quite slow catalyst metal in the bottom of the container, you could maybe adapt this? Depends how hardcore scientific it is I suppose, though I'm guessing you'd know how to if it was.

Thankyou Shaolin, hydrogen peroxide H202 is a great sterilant. Hydrogen peroxide has effects that are undesirable in the process I am trying. Saying that I would be interested to find out what that inhibitor catalyst metal is.

[RealSquirrels]

hydrogen peroxide and a catalyst will generate oxygen (+H2O) for you.

or do you want to generate it in situ? otherwise I don't see why the pH is a problem.

[jontysafe]

Sounds like catalase:

A minor use is in contact lens hygiene - a few lens-cleaning products disinfect the lens using a hydrogen peroxide solution; a solution containing catalase is then used to decompose the hydrogen peroxide before the lens is used again.

[jontysafe]

RealSquirrels said:

hydrogen peroxide and a catalyst will generate oxygen (+H2O) for you.

or do you want to generate it in situ? otherwise I don't see why the pH is a problem.

I want to generate in situ where pH is 6ish and certain bacteria have to survive the reaction.

Hydrogen peroxide has been used in the past but the situ is soil and I don`t want to sterilise it. Hence that brought me on to other peroxides such as magnesium and calcium but they are short lived at lower ph.

I suppose if I could use an inhibitor and pH balancer in a liquid formulation with the hydrogen peroxide that might work? would be good of it did because hydrogen peroxide is so readily available.

Anyone have experience with Ammonium Persulphate? Or Tetra Potassium Pyrophosphate buffered hydrogen peroxide?

Edited by jontysafe on Wednesday 31st October 12:46

[Simpo Two]

Interesting task - someone's degree project?

[jontysafe]

No, just throwing some ideas around.

[blitzracing]

Electrolysis of water if you can provide a bit of power?

[jontysafe]

Now that`s an interesting proposition, will do a bit more reading. Moisture levels would have to be pretty high though. Wonder whether it would work in the 100% free draining sand situ?

[blitzracing]

I was thinking of a separate chamber to capture the oxygen, then pipe it to where you want it more than putting power through your wet substrate- dont forget you will get hydrogen at the other terminal that you would want to vent off.

[Simpo Two]

What do those 'oxy-action' stain removers use?

[Stu R]

Sodium Percarbonate IIRC and marketing