Tojsiab
Cov kws tshawb fawb ntawm Northwestern University tau piav qhia txog txoj hauv kev muaj peev xwm los rhuav tshem cov hluavtaws hu ua "cov tshuaj mus ib txhis" hu ua PFAS hauv ib daim ntawv luam tawm hnub Thursday hauv phau ntawv journal Science, qhov tseeb ua hauj lwm tsom mus rau kev txhim kho txhais tau tias los rhuav tshem cov tshuaj pervasive uas tau pom tias muaj teeb meem rau tib neeg noj qab haus huv.
Cov kws tshawb fawb ntawm Northwestern University tab tom siv txoj hauv kev tshiab los rhuav tshem PFAS, "mus ib txhis … [+]
Boston Globe ntawm Getty Images
Cov Lus Tseem Ceeb
Cov kws tshawb nrhiav pom ib hom PFAS (ib- thiab polyfluoroalkyl tshuaj) hu ua PFCAs (perfluoroalkyl carboxylic acids) tuaj yeem tawg los ntawm kev ua kom sov rau lawv nrog cov kuab tshuaj ntawm qhov kub qis ntawm 80 txog 120 degrees Centigrade thaum ua ke nrog sodium hydroxide - ib qho tshuaj pheej yig uas feem ntau pom. hauv xab npum.
Txoj kev kawm tau zoo tuaj peb lub hlis tom qab cov kws tshawb fawb ntawm University of California, Riverside tau luam tawm ib qho txoj kev tshawb no in Environmental Science & Kev Siv Tshuab nrhiav kev kho iodide siv ua ke nrog lub teeb ultraviolet thiab sulfite tuaj yeem rhuav tshem txog li 90% ntawm cov pa roj carbon-fluorine atoms tsis zoo hauv PFAS hauv ib teev, thaum tus kws tshawb fawb ntawm Battelle tau tsim cov tshuab oxidation dej hu ua "PFAS annihilator"kom rhuav tshem cov tshuaj "tsis tsim kev puas tsuaj los ntawm cov khoom lag luam."
PFAS, uas muaj ntau cov khoom xyaw nyob rau hauv Teflon thiab lwm yam ntaub ntawv uas tsis yog-stick thiab dej-pov thawj, nrog rau cov hluav taws tua hluav taws ua npuas ncauj, tau dhau los ua ib qho kev txhawj xeeb loj hlob nyob rau hauv xyoo tas los no tom qab cov kws tshawb fawb pom muaj kev ceeb toom ceeb toom hauv huab cua, tsiaj txhu thiab hauv dej haus - Lub Chaw Tiv Thaiv Ib puag ncig muaj muab tawm Cov lus qhia txog kev noj qab haus huv dej haus rau ob hom PFAS: PFOA thiab PFOS.
Cov tshuaj tau txuas nrog cov roj (cholesterol) ntau ntxiv, ua rau muaj kev pheej hmoo ntawm mob qog noj ntshav hauv lub raum thiab qog nqaij hlav cancer, muaj kev pheej hmoo siab ntshav siab hauv cov poj niam cev xeeb tub thiab cov me nyuam mos qhov hnyav, raws li Lub Chaw Haujlwm Saib Xyuas Tshuaj Tiv Thaiv thiab Tshuaj Tiv Thaiv Kab Mob.
Cov kws tshawb fawb Northwestern hais tias lawv cov txheej txheem yog kev tawm mus los ntawm cov txheej txheem hnyav uas siv los rhuav tshem cov tshuaj, xws li incineration thiab plasma-based oxidation.
Cov kws tshawb fawb kuj pom tias cov txheej txheem degradation siv nyob rau hauv txoj kev tshawb no tseem tuaj yeem siv rau lwm hom PFAS, thiab kho cov tshuaj ntawm qhov qis dua li cov qib siv hauv txoj kev tshawb fawb.
Tus Keeb Kwm Tseem Ceeb
PFAS raug xa mus rau "cov tshuaj nyob mus ib txhis" vim tias lawv cov pa roj carbon-flourine muaj zog ua rau lawv nyob twj ywm yam tsis muaj kev puas tsuaj hauv ib puag ncig. Lawv tau pom nyob rau hauv high concentrations nyob ze qhov chaw pov tseg, qhov twg lawv nyob nraum dumped, thiab tshav dav hlau, qhov chaw tua hluav taws ua npuas ncauj yog siv rau hauv kev cob qhia, thiab nyob ib ncig ntawm cov chaw tsim khoom. Cov tshuaj tau tsim nyob rau xyoo 1930s, thiab feem ntau ua haujlwm tawm ntawm kev tsim khoom hauv nruab nrab xyoo 2000s. Lub Rau Hli, EPA tshaj tawm tshiab qauv rau PFAS, nrog rau cov tshuaj tshiab hu ua GenX, hauv cov dej haus thiab tshaj tawm $ 1 billion nyiaj pab rau cov xeev los daws PFAS cov kab mob hauv cov dej haus.
Tus lej Loj
0.02 seem ib trillion. Qhov ntawd yog tus nqi ntawm PFOS (perfluorooctane sulfonic acid) tau txais hauv cov dej haus, raws li EPA's raws li kev cai tso tawm rau lub Rau Hli. Rau PFOA (perfluorooctanoic acid), nws yog 0.004 qhov chaw ib trillion, zoo hauv qab EPA cov lus qhia yav dhau los ntawm 70 feem ntawm ib trillion, teem rau xyoo 2016.
ntxiv nyeem ntawv
Battelle's PFAS Annihilator Victorious Over 'Forever Chemicals' (Forbes)'Tshuaj lom neeg mus ib txhis' nyob hauv huab cua thiab dej mus tas li. Tab sis cov kws tshawb fawb tau pom txoj hauv kev tshiab los rhuav tshem lawv. (NBC News)
'Cov Tshuaj Txhuam Hniav' Hauv Koj Cov Dej Haus, Nws yog qhov phem dua li qhov kev xav yav dhau los (Forbes)
Tau qhov twg los: https://www.forbes.com/sites/brianbushard/2022/08/18/scientists-building-up-arsenal-to-destroy-pfas-forever-chemicals/