United States idzakwaniritsa zofunikira zina zolengeza za 329 PFAS zinthu

Pa Januware 27, 2023, bungwe la US Environmental Protection Agency (EPA) lidaganiza zokhazikitsa Lamulo Latsopano Lofunika Kwambiri (SNUR) la zinthu za PFAS zomwe zalembedwa pansi pa Toxic Substances Control Act (TSCA).

Patatha pafupifupi chaka chokambirana ndikukambirana, njira yowongolerayi idakhazikitsidwa mwalamulo pa Januware 8, 2024!
1. Zinthu zosagwira ntchito
Zinthu zomwe sizikugwira ntchito mu bukhu la TSCA zimatanthauza zinthu zomwe sizinapangidwe, kutumizidwa kunja, kapena kukonzedwa ku United States kuyambira pa June 21, 2006.
Nthawi zambiri, mankhwala oterowo safuna kuwunika kwathunthu kwa EPA ndi kuthetsa chiopsezo kuti ayambirenso kupanga, kuitanitsa, ndi kukonza ntchito zamalonda mkati mwa United States.
Ndi kukhazikitsidwa kwa mfundo zowongolera zaposachedwa, njira yoyambiranso kupanga zinthu za PFAS zomwe sizikugwira ntchito ku United States zisintha.
2. Mbiri ya njira zomwe zakhazikitsidwa
EPA ikuwona kuti ngati zinthu zomwe sizikugwira ntchito za PFAS ziloledwa kuyambiranso kupanga ndi zochitika zina popanda kuunika kwathunthu ndi kuthetsa ziwopsezo, zitha kuvulaza thanzi la anthu komanso chilengedwe.

Chifukwa chake, EPA yasankha kuti zinthu zotere ziyenera kuchitidwa ndi Kulengeza Kwatsopano Kwatsopano (SNUN) musanayambirenso kupanga ndi ntchito zina. Wolengezayo akuyenera kupereka chidziwitso chokhudza kugwiritsidwa ntchito kwawo, kuwonekera, ndi kumasulidwa mkati mwa United States ku EPA kuti awunikenso, ndikuwonetsetsa ngati angabweretse chiwopsezo chosalamulirika ku thanzi la anthu ndi chilengedwe asanagwiritse ntchito.
3. Ndi zinthu ziti zomwe zidzayang'anizane ndi njira zowongolera
Ndondomeko yowongolera iyi imaphatikizapo zinthu 329 zosagwira ntchito za PFAS.
Zinthu 299 zalembedwa pamndandanda, ndipo makampani amatha kuzitsimikizira kudzera muzambiri monga manambala a CAS. Koma pali zinthu 30 zomwe sizinatchulidwe momveka bwino chifukwa chokhudzidwa ndi ntchito za CBI. Ngati zinthu zabizinesiyo zikukwaniritsa matanthauzidwe otsatirawa a PFAS, ndikofunikira kupereka chitsimikiziro chachilendo ku EPA:
R - (CF2) - CF (R ') R', pamene onse CF2 ndi CF ali saturated carbon;
R-CF2OCF2-R ', kumene R ndi R' angakhale F, O, kapena saturated carbon;
CF3C (CF3) R'R '', pomwe R 'ndi R' 'atha kukhala F kapena mpweya wodzaza.
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