So we left off with putting clorox/chlorine in saltwater for 20-25ppm.
Would a good UV burn the chlorine off?
Would a good UV burn the chlorine off?
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Yes but you may not like the end product
2HOCl (bleach) + sunlight/UV/wave length --> 2HCl + O2.
You do know what HCl is ?
HCl ==> H+ + Cl-, meaning pH and Alk dropping. The pH and Alk could be brought back-up but I do not know how much affect the UV will have, as most studies are done in FW chlorinated waters.
Photodechlorination is function of;
Dechlorination (% of remaining chlorine residuals R) as a function of solar UV-A *fluence (Watt hr /m^2), is based on the equation:
R = 100e^-0.238IT (n = 12, r = -0.985, p < 0.001.)
There is also the possibility of converting bromide into bromine bleach ( not a good thing) in the presence of UV and chlorine. So for safety, one would still need to run GAC, if nothing else, to remove any bromine and convert it back to bromide.
I might add that running chlorine through a ozone unit is also a bad idea. Same for UV and hydrogen peroxide reacting with chlorine.