Stuck with it

时间:2019-03-06 04:13:01166网络整理admin

By Alison Motluk NON-STICK frying pans may be polluting towns and cities with a chemical that is almost impossible to destroy naturally. Canadian scientists have found that materials used to coat pans, such as Teflon, degrade when heated into trifluoroacetic acid (TFA), an extremely persistent compound that stays in the environment. “All of the ‘dirty dozen’ are relatively non-persistent compared to this,” says Scott Mabury of the University of Toronto, referring to the United Nations’ top 12 blacklisted chemicals. Surgical needles and engine additives are also made with fluorinated polymers such as Teflon and Kel-F. Until now,