00:00To limit the impact on our health of forever chemicals or PFAS, water can be decontaminated
00:12in different ways. The most widespread technique is activated carbon. Water passes through a thick
00:19layer of granular activated carbon that traps pollutants. Another method is the use of small
00:26resin beads that absorb PFAS through iron exchange. But these techniques do not trap the smallest
00:32forever chemicals. For those, membrane filtration is required, particularly one based on low pressure
00:40reverse osmosis. Water passes through a sieve made of very fine polymer fibers with pores smaller than
00:48a 1 nanometer. However, these methods are not 100% effective and have some downsides. They are
00:55expensive, energy intensive and do not solve the problem of disposing of the recovered PFAS.
01:02For now, these are stored with hazardous waste, sometimes incinerated.
01:06They can also be injected underground, but this process remains rare.
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