There is some controversy around re-mineralization of RO water. Many companies claim re-mineralization is mandatory for health reasons, and they sell products that may or may not provide significant quantities of minerals to the water. Most minerals from your diet come from your food, rather than water, so I would focus on making sure your total diet contains the recommended amount of minerals. There certainly may be other risks of RO water that I'm not aware of as well.

It is too widespread in the environment so it is impossible to retrieve it all back. So here’s my thoughts on it 1. Stop production 2. Filter it out and use the method northwestern scientists used on a massive scale on the filtered out byproducts

Can you provide a link to the filter method

Pytoremediation is a method of Removal of PFS, Some sort of Catalytic Process would be covered in that Destruction of PFS bit. Interesting though I’ll look up that case. Someone in a video on agricultural contamination mentioned “they would have to grow corn for 5 years only to destroy it to clean up their land” which may have been the same process, neat!

Supercritical Water Oxidation is pretty neat. I like Supercritical *Gasification* even more though! I am uncertain how the Fluorine behaves, is it part of the ash mixture? (I Like Gasification More Because it Can integrate it with Energy and/or Heat Generation like Biomass Power (especially in the case of Wastewater Treatment / Biosolids etc) or into (Bio-)Refinery and Chemical Plant Workflows that need the Hydrogen / Carbon Monoxide) Either way *especially* since phytoremediation will probably play a role, integrating methods that work with Biomass/Bioenergy well may allow for some synergy there. Also reduces energy use (Granted proper Life Cycle Assessment needed)

Great question and I'm not sure there is a clear answer at this point. Most teflon polymers contain very low or no traces of the short-chained PFAS used in their production (PFOA for example). Wearing appropriate PPE to limit inhalation exposure to dust from machining would likely protect you from significant exposure.

Distillation is an effective solution, but with high energy cost, similar to or greater than reverse osmosis filtration.

This is a great idea, but the energy it would take to free up those CF bonds would be more energy than the combustion would generate. Very tricky to burn a fire-retardant!

Unlike some more notorious chemicals they aren’t as immediately dangerous. (Especially pure PTFE, not the Precursors/Byproducts in Wastewater which cause the most havoc). Bioaccumulation is a risk though, and given it’s effects are being researched as we speak (with us as test subjects of sorts) it may end up being worse than we thought. It is probably going to be a slow phase out, but for nonessential things (most consumer products etc) it probably can be rapidly phased out if not banned. I know personally I don’t plan on buying any PTFE Based Nonstick (Teflon) Pans, i try and limit use of PTFE in any designs i use, don’t buy PTFE Lubricant Cans, etc Talking to your representatives and making sure the people around you are informed is important as well! (Granted Chemical Corporate Dollars are fighting against you, but between sheer will+numbers (and campaign finance reform, although that is a whole separate beast) they CAN be beat)