Filtering out those perchlorates

We looked into getting oxygen (and hydrogen) from Martian perchlorates. How about skipping that and just getting the water?

Apparently perchlorates do have uses, like in rocket-fuel (nothing to sneeze at in a low-g planet), but you still don't want to drink them.

Besides electrolysis and straight boiling, both of which need energy which Mars is short on, UC Riverside went looking for a catalyst to turn the perchlorates into less-harmful chlorides.

What they've done is mixing a common fertilizer called sodium molybdate, a common organic ligand called bipyridine to bind the molybdenum, and a common hydrogen-activating catalyst called palladium on carbon. The oxygen in those perchlorates has to go somewhere else, probably into all those chemicals, but that's a job for the chemists; point is, you've now got water, albeit a little briny, but at least not toxic.