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Can anyone help me understand how anything at a concentration of < 5PPT can be dangerous? I'm not arguing, just trying to get my head around it. (And yes I re
by sparker72678 7y ago
Can anyone help me understand how anything at a concentration of < 5PPT can be dangerous?
I'm not arguing, just trying to get my head around it.
(And yes I realize that in some of these areas the concentrations were orders of magnitude higher; the recommendation for allowable concentration is < 1PPT according to the article)
- refurb 7y agoI had a similar question. I assume that these compounds aren’t readily excreted from the body, so you’d want a very low limit with the understanding it would accumulate over time? Just a guess.
- sparker72678 7y agoThat makes sense. Thanks!
- theptip 7y agoI believe these chemicals get concentrated in the human body as they don’t get eliminated very fast. They are very stable too (hence “forever chemical”) so they don’t break down either.
- sparker72678 7y agoMakes sense, thanks!
- mcguire 7y agoIt doesn't degrade and accumulates in the body (https://en.wikipedia.org/wiki/Perfluorooctanoic_acid#Human_data https://en.wikipedia.org/wiki/Perfluorooctanoic_acid#Human_d...), where it looks like it acts like a "biological handgrenade" (a nifty term I heard elsewhere). "PFOA is not rapidly eliminated from the human body, with a half-life of 3.8 years in human blood, thus raising the public concerns over the toxicological implications due to internal exposure." (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4817033/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4817033/) That's elimination from retired "fluorochemical production workers" (https://www.ncbi.nlm.nih.gov/pubmed/17805419/ https://www.ncbi.nlm.nih.gov/pubmed/17805419/).
- sparker72678 7y agoGot it, thanks!