Thaum lub Cuaj Hlis 28, 2023, Lub Chaw Haujlwm Saib Xyuas Kev Tiv Thaiv Ib puag ncig hauv Tebchaws Meskas (EPA) tau ua tiav txoj cai rau PFAS tshaj tawm, uas tau tsim los ntawm Asmeskas cov tub ceev xwm nyob rau lub sijhawm ntau tshaj li ob xyoos txhawm rau ua tiav Txoj Haujlwm Npaj Ua Haujlwm los tawm tsam PFAS cov pa phem, tiv thaiv pej xeem kev noj qab haus huv, thiab txhawb kev ncaj ncees ib puag ncig. Nws yog ib qho tseem ceeb tshaj plaws nyob rau hauv EPA lub tswv yim txoj kev taw qhia rau PFAS, Thaum lub sij hawm ntawd, qhov loj tshaj plaws puas database ntawm perfluoroalkyl thiab perfluoroalkyl tshuaj (PFAS) tsim thiab siv nyob rau hauv lub tebchaws United States yuav muab rau lub EPA, nws cov neeg koom tes, thiab cov pej xeem.
Cov ntsiab lus tshwj xeeb
Lub Koom Haum Saib Xyuas Kev Tiv Thaiv Ib puag ncig hauv Teb Chaws Asmeskas (EPA) tau tshaj tawm tsab ntawv ceeb toom zaum kawg thiab cov ntaub ntawv khaws cia cov cai rau perfluoroalkyl thiab perfluoroalkyl tshuaj (PFAS) raws li Tshooj 8 (a) (7) ntawm Txoj Cai Tswj Tshuaj Toxic (TSCA). Txoj cai no xav kom cov tuam txhab lag luam lossis cov neeg xa khoom ntawm PFAS lossis PFAS uas muaj cov khoom tsim tawm (nrog rau cov khoom xa tuaj) hauv ib xyoos txij li xyoo 2011 yuav tsum muab EPA nrog cov ntaub ntawv ntawm lawv cov kev siv, kev tsim khoom, pov tseg, raug, thiab muaj kev phom sij hauv 18-24 lub hlis tom qab txoj cai siv. , thiab cov ntaub ntawv tseem ceeb yuav tsum tau khaws cia rau 5 xyoos. PFAS cov khoom siv los ua tshuaj tua kab, khoom noj, khoom noj khoom haus, tshuaj, tshuaj pleev ib ce, lossis khoom siv kho mob raug zam los ntawm daim ntawv tshaj tawm no.
1 Hom PFAS koom nrog
PFAS cov khoom yog ib chav kawm ntawm cov tshuaj lom neeg nrog cov ntsiab lus tshwj xeeb. Txawm hais tias EPA muab cov npe ntawm PFAS cov khoom uas yuav tsum tau muaj lub luag haujlwm ceeb toom, daim ntawv teev npe tsis muaj tseeb, txhais tau hais tias txoj cai tsis suav nrog cov npe tshwj xeeb ntawm cov tshuaj uas tau txheeb xyuas. Hloov chaw, nws tsuas yog muab cov khoom sib txuas uas ua tau raws li ib qho ntawm cov qauv hauv qab no, uas xav tau PFAS tshaj tawm cov luag haujlwm:
R - (CF2) - CF (R ′) R ″, qhov twg CF2 thiab CF yog ob qho tib si saturated carbon;
R-CF2OCF2-R ', qhov twg R thiab R' tuaj yeem yog F, O, lossis saturated carbon;
CF3C (CF3) R'R, qhov twg R 'thiab R' tuaj yeem yog F lossis saturated carbon.
2 Kev ceev faj
Raws li tshooj 15 thiab 16 ntawm US Toxic Substances Control Act (TSCA), tsis xa cov ntaub ntawv raws li kev cai lij choj yuav raug suav tias yog kev ua txhaum cai, raug nplua rau pej xeem, thiab yuav ua rau raug foob txhaum cai.
BTF qhia tias cov tuam txhab lag luam uas tau koom nrog kev lag luam nrog Tebchaws Meskas txij li xyoo 2011 yuav tsum ua tib zoo taug qab cov ntaub ntawv luam tawm ntawm cov tshuaj lossis cov khoom, paub meej tias cov khoom puas muaj PFAS cov tshuaj uas ua tau raws li cov qauv txhais, thiab raws sijhawm raws li lawv cov cai tshaj tawm kom tsis txhob muaj. kev ua raws li kev pheej hmoo.
BTF ceeb toom rau cov tuam txhab lag luam kom ua tib zoo saib xyuas cov xwm txheej hloov kho ntawm PFAS cov cai, thiab npaj cov khoom lag luam thiab cov khoom siv tshiab tsim nyog los xyuas kom meej tias cov khoom ua tau raws li txoj cai. Peb muaj cov kws tshaj lij kev tshaj lij los taug qab qhov kev txhim kho tshiab tshaj plaws hauv cov qauv kev tswj hwm thiab pab koj tsim cov phiaj xwm tsim nyog tshaj plaws. Thov koj xav tiv tauj peb.
Post lub sij hawm: Dec-28-2023
