Neutralising Hydrogen Peroxide

[Delapool]

Possibly of rare interest except if spot-treating BBA with H2O2 and were thinking neutralisation just in case.

I came across this article on neutralising H2O2 using water conditioner (p193).

(a) sodium thiosulphate
S203 + H202 <=> S406 +OH

https://www.researchgate.net/public...ection_of_hydrogel_contact_lenses_An_overview

 

[Fresh2o]

Very interesting. I never figured that H2O2 would persist in water in equilibrium. I assumed that it would eventually become H2O + a free O over time.
A large water change using a sodium thiosulphate conditioner should cease any further action of the product.
I remember using H2O2 plus a reactive metal catalyst with my contacts many years ago.

 

[Delapool]

Very interesting. I never figured that H2O2 would persist in water in equilibrium. I assumed that it would eventually become H2O + a free O over time.
A large water change using a sodium thiosulphate conditioner should cease any further action of the product.
I remember using H2O2 plus a reactive metal catalyst with my contacts many years ago.

I thought it went in a matter of minutes, if not hours whenever I used during a water change but I found recently in a small, clean tank it lasted over night. Nothing much to react with I guess. I could see gas bubbles appearing on the fern for quite some time.

That's interesting with the reactive metal. Might be other ways out there to neutralise it. I think potassium permanganate will as well but that might be a double-edged sword.

 

[Fresh2o]

I see bubbles coming from plants and the substrate many hours after dosing H2O2. Not sure if that is from a lingering reaction or the over saturation of oxygen or a combination of both.
Here is a high tech version of the contact lens sterilization case using hydrogen peroxide.

 

[Fresh2o]

An interesting article on catalase, a powerful enzyme that can reduce millions of H2O2 molecules per second. Catalase