[lux]

Well there is companies working on a more wide-scale solution to this on our own planet because we have a lot of salt water that can be used and a lot of countries are surrounded by salt water.

The best option would be to boil it and use the condensation on a large scale because the condensation/moisture that builds up is drinkable kind of like a moonshine stihl, you can actually do this with a pot, glass/metal cup and a pot lid.

But again, having to boil it takes energy, whereas a chemical mixture we can just add to it would be much more efficient. And depending on the saltiness, boiling could just render you with 10% water and 90% salt.