Thaum lub Yim Hli, cov kws kho mob tau tshaj tawm tias lawv tuaj yeem ua qhov zoo li tsis yooj yim sua: rhuav tshem qee cov kab mob tsis zoo uas tsis muaj kuab lom nyob rau hauv cov mob me.Per- thiab polyfluoroalkyl tshuaj (PFAS), feem ntau hu ua tshuaj lom neeg mus ib txhis, tau tsub zuj zuj hauv ib puag ncig thiab peb lub cev ntawm qhov ceeb toom.Lawv cov kav ntev, hauv paus hauv qhov nyuaj-rau-tawg carbon-fluorine daim ntawv cog lus, ua rau PFAS tshwj xeeb tshaj yog muaj txiaj ntsig zoo li cov dej tsis muaj dej tsis zoo thiab cov dej tsis zoo thiab cov hluav taws kub hnyiab, tab sis nws txhais tau hais tias cov tshuaj muaj nyob rau ntau pua xyoo.Qee cov tswv cuab ntawm chav kawm loj ntawm cov tebchaw no paub tias yog tshuaj lom.
Pab pawg, coj los ntawm Northwestern University chemist William Dichtel thiab tom qab kawm tiav cov tub ntxhais kawm Brittany Trang, pom qhov tsis muaj zog ntawm perfluoroalkyl carboxylic acids thiab tshuaj GenX, uas yog ib feem ntawm lwm chav kawm ntawm PFAS.Cua sov cov tebchaw nyob rau hauv ib tug hnyav clips tawm cov tshuaj 'carboxylic acid pawg;Qhov sib ntxiv ntawm sodium hydroxide ua haujlwm tas li, tawm hauv qab fluoride ions thiab cov organic molecules kuj zoo.Qhov kev rhuav tshem ntawm C-F daim ntawv cog lus muaj zog heev tuaj yeem ua tiav ntawm 120 ° C (Science 2022, DOI: 10.1126/science.abm8868).Cov kws tshawb fawb vam tias yuav sim txoj kev tawm tsam lwm hom PFAS.
Ua ntej txoj haujlwm no, cov tswv yim zoo tshaj plaws rau kev kho PFAS yog txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau ntawm qhov kub siab heev uas siv lub zog loj - uas tej zaum yuav tsis ua haujlwm tag nrho, hais tias Jennifer Faust, kws tshuaj ntawm College of Wooster.Nws hais tias "Yog vim li cas qhov txheej txheem kub qis no tau cog lus tiag tiag," nws hais.
Txoj kev tawg tshiab no tau txais tos tshwj xeeb hauv cov ntsiab lus ntawm lwm qhov kev tshawb pom 2022 txog PFAS.Thaum Lub Yim Hli, Stockholm University cov kws tshawb fawb coj los ntawm Ian Cousins tau tshaj tawm tias cov dej nag thoob ntiaj teb muaj cov tshuaj perfluorooctanoic acid (PFOA) ntau dua li US Environmental Protection Agency cov lus qhia qib rau cov tshuaj hauv cov dej haus (Environ. Sci. Technol. 2022, DOI: 10.1021. /acs.est.2c02765).Txoj kev tshawb nrhiav pom muaj qib siab ntawm lwm yam PFAS hauv cov dej nag thiab.
Faust hais tias "PFOA thiab PFOS [perfluorooctanesulfonic acid] tau tawm ntawm kev tsim khoom rau ntau xyoo lawm, yog li nws mus qhia tias lawv pheej yig npaum li cas," Faust hais."Kuv tsis xav tias yuav muaj ntau qhov no."Cusins txoj haujlwm, nws hais tias, "yog qhov kawg ntawm cov dej khov."Faust tau pom cov tshiab PFAS-cov uas tsis tu ncua los ntawm EPA-hauv Teb Chaws Asmeskas cov dej nag uas muaj ntau dua li cov khoom qub qub no (Environ. Sci.: Processes Impacts 2022, DOI: 10.1039/d2em00349j).
Post lub sij hawm: Dec-19-2022