Electrolysis Electrolysis ...

Electrolysis

Electrolysis involves sending a current through a solution to drive a chemical reaction. It is how Chlor-Alkali plants produce Chlorine and Caustic from sea water or brine. The pH is lowered at the anode where oxidation occurs in the solution and the pH is raised at the cathode where reduction occurs in the solution.

Often hydrogen gas will evolve at the cathode.

How exactly it effects TDS will depend entirely upon the composition of the TDS. If the current is not strong enough or the voltage is wrong, it is very possible that it will do little or nothing.

I am aware of a device called The Green Machine that uses the higher pH at the cathode to precipitate calcium carbonate. This is then removed in some method that I am not familiar with to lower the over all hardness of the solution and thus soften the water to some degree.

I am not aware of an electrolytic method of sulfur removal, though H2S is a water soluble gas. Aeration has been effective for sulfur removal and acidification would be expected to improve that. Perhaps there is a device that aerates at the anode to remove sulfur. I am just not aware of it.

One thing you should be very cautious about is people trying to sell you a device that removes nothing from the water but somehow solves your problem by changing something in the water that no one, not even they, can detect. If it removes nothing from the water and the chemical changes cannot be detected, most likely nothing happened and all it will do is remove some money from you.