Perfluortenside – the long shadows of the past

Perfluortenside - the long shadows of the past

A 3M invention of 1947: PFOA. The ammonium salt is used as a surfactant to keep fluorinated monomers during emulsion polymerization to PTFE in solution. Image: Bernd Schroder

Creeping Storfall – Redux

See also: Industrial Chemicals: Perfluorenside Contamin the Environment

Non-adhesive achievements have their price

In February 2017, Chemistry companies have approved DuPont and Chemours of a payment of $ 670 million. This should be the complaints of 3.550 residents Ohios and West Virginias. The Dupont Factory in Parkersburg, West Virginia, had contaminated the drinking water of the area with perfluoroctanaure (PFOA) and led to health problems under the plaintuts, which took this water sometimes nothing suspended.

Perfluorated and polyfluorinated chemicals (PFC) with surface active properties have been produced for more than 60 years. Everywhere, where environmental chemists are looking for today, they become understate. You will find the substances in the blood or the organs of the Atlantic salmon and the trout of ontariaes, in icebar and tapered robes, in cormorans and sea eaters. Whether in the Baltic Sea or in the Mediterranean, whether in the Arctic or on the Midway islands in the middle of the North Pacific: PFC are now to be found everywhere – even in humans.

PFCs have immortalized in drinking water and in almost every angle of the food chain until further notice – worldwide. They do not rich like most long-lasting organic pollutants (persistent organic pollutants – pops) in fatty tie, but in muscle tie, kidney, liver and gallbladder; In addition, they missed bonds with proteins of the blood serum.

Two representatives came to notorious rearance: Pfos and Pfoa. Perfluoroctansulfonate (PFOs) has already been pulled out of traffic due to its risk potential and is only occasionally used in special applications. For Perfluoroctanaure (PFOA), which is said to be a similar harmful potential, the shouting was more difficult – it applies in the industry to be difficult to replace.

DuPont had liven for decades of rough quantities Pfoa with the wastewater of the Parkersburg factory in the Ohio River. From the 1980s, thousands of tons of Pfoa-containing sludge were stored on a landfill from which the chemical entered the water cycle. The drinking water of more than 100.000 Residents of the adjacent communities of Parkersburg, Vienna, Little Hocking and Lubeck was contaminated.

Perfluortenside - the long shadows of the past

N-methyl-perfluorooctansulfonamidoethanol (N-Mefose). To the first perfluorensiden on the market, patch protection products of 3M, based on perfluoroalkylsulfonamidoethanols. A degradation products: Pfos. Image: Bernd Schroder

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