3bromopyr

Thank you Sensei for replying. I am interested in removing the small amount of deuterium that is in tap water. Yes, I could start with regular water (or deuterium depleted water) and then apply electrolysis. I would then have hydrogen gas (using DDW would give deuterium depleted hydrogen gas.) Could I not then separate the hydrogen gas produced further to reduce the deuterium content? The hydrogen gas produced would be a mixture of H2, DH and D2 (where H represents protium). Deuterium has different properties than protium. Would there be a way to separate the hydrogen molecules containing deuterium and those only containing protium? For example, by diffusion through a membrane?

Given a volume of hydrogen gas (mixture of protium and deuterium hydrogen), how one might separate this into only protium hydrogen? Knudsen diffusion? (MW1/MW2)^^0.5 MW deuterium (H2) = 4.028 MW protium (H2) = 2.0158 (4.028/2.0158) ^^0.5 = 2^^0.5 = 1.414 Separation factor of 1.41 is possible by diffusing through a membrane.