Perfluorooctanoic acid (PFOA) (conjugate base perfluorooctanoate), tseem hu ua C8, yog ib qho hluavtaws perfluorinated carboxylic acid thiab fluorosurfactant.Ib daim ntawv thov kev lag luam yog ua ib qho surfactant hauv emulsion polymerization ntawm fluoropolymer.Nws tau raug siv los tsim cov khoom lag luam tseem ceeb xws li polytetrafluoroethylene (kev lag luam hu ua polymer).PFOA tau tsim tawm txij li xyoo 1940s hauv cov khoom lag luam.Nws kuj yog tsim los ntawm degradation ntawm precursors xws li ib co fluorotelomers.
PTFE tau siv hauv kev lag luam txij li xyoo 1940s.Nws muaj ntau yam kev siv vim tias nws ruaj khov heev (nws tsis hnov mob nrog lwm cov tshuaj) thiab tuaj yeem muab qhov yuav luag tsis muaj kev sib txhuam.Cov neeg feem coob paub tias nws yog ib qho uas tsis yog-stick txheej rau cov lauj kaub thiab lwm yam cookware.Nws kuj yog siv rau hauv ntau lwm yam khoom, xws li ntaub thaiv.
Perfluorooctanoic acid (PFOA), tseem hu ua C8, yog lwm tus neeg tsim tshuaj.Nws yog siv rau hauv cov txheej txheem ntawm kev ua cov polymer thiab cov tshuaj zoo sib xws (lub npe hu ua fluorotelomers), txawm hais tias nws raug hlawv tawm thaum lub sijhawm txheej txheem thiab tsis muaj qhov tseem ceeb hauv cov khoom kawg.
PFOA muaj peev xwm ua rau muaj kev txhawj xeeb txog kev noj qab haus huv vim tias nws tuaj yeem nyob hauv ib puag ncig thiab hauv tib neeg lub cev rau lub sijhawm ntev.Cov kev tshawb fawb tau pom tias nws muaj nyob thoob ntiaj teb nyob rau theem qis heev ntawm txhua tus neeg cov ntshav.Cov ntshav siab dua tau pom nyob rau hauv cov neeg nyob hauv zej zog uas cov khoom siv dej hauv zos tau kis los ntawm PFOA.Cov neeg raug PFOA hauv chaw ua haujlwm tuaj yeem muaj qib ntau dua.
PFOA thiab qee qhov sib xyaw zoo sib xws tuaj yeem pom nyob rau theem qis hauv qee yam khoom noj, dej haus, thiab hauv cov plua plav hauv tsev.Txawm hais tias PFOA qib hauv cov dej haus feem ntau yog qis, lawv tuaj yeem siab dua hauv qee qhov chaw, xws li nyob ze cov nroj tsuag tshuaj uas siv PFOA.
Tib neeg kuj tuaj yeem raug PFOA los ntawm cov khoom siv caij ski los yog los ntawm cov ntaub thiab cov ntaub pua plag uas tau raug kho kom tsis txhob muaj stain.Tsis yog-stick cookware tsis yog qhov tseem ceeb ntawm PFOA raug.
Ntau qhov kev tshawb fawb hauv xyoo tas los no tau saib qhov ua tau ntawm PFOA ua rau mob qog noj ntshav.Cov kws tshawb fawb siv 2 hom kev tshawb fawb tseem ceeb los sim seb puas muaj cov tshuaj no tuaj yeem ua rau mob qog noj ntshav.
Kev tshawb fawb hauv lub lab
Hauv cov kev tshawb fawb ua tiav hauv chav kuaj, cov tsiaj tau raug tshuaj (feem ntau hauv cov koob tshuaj loj heev) kom pom tias nws ua rau qog nqaij hlav lossis lwm yam teeb meem kev noj qab haus huv.Cov kws tshawb fawb kuj tseem tuaj yeem nthuav tawm tib neeg lub hlwb hauv chav kuaj rau cov tshuaj kom pom tias nws ua rau cov kev hloov pauv uas pom hauv cov qog nqaij hlav cancer.
Kev tshawb fawb hauv cov tsiaj txhu hauv lab tau pom tias raug PFOA ua rau muaj kev pheej hmoo ntawm qee cov qog nqaij hlav ntawm daim siab, cov qog ntshav, cov qog mammary (mis), thiab txiav txiav hauv cov tsiaj no.Feem ntau, cov kev tshawb fawb ua tau zoo nyob rau hauv cov tsiaj ua tau txoj haujlwm zoo ntawm kev kwv yees seb qhov twg ua rau mob qog noj ntshav hauv tib neeg.Tab sis nws tsis meej yog tias txoj kev tshuaj no cuam tshuam rau kev mob qog noj ntshav hauv cov tsiaj yuav zoo ib yam rau tib neeg.
Kev tshawb fawb hauv tib neeg
Qee hom kev tshawb fawb saib cov kab mob qog noj ntshav hauv ntau pawg neeg.Cov kev tshawb fawb no tuaj yeem sib piv cov qog nqaij hlav cancer hauv ib pab pawg uas raug tshuaj rau tus mob qog noj ntshav hauv ib pab pawg uas tsis raug rau nws, lossis muab piv rau tus mob qog noj ntshav hauv cov pej xeem.Tab sis qee zaum nws tuaj yeem nyuaj kom paub tias cov txiaj ntsig ntawm cov kev tshawb fawb no txhais li cas, vim tias ntau lwm yam yuav cuam tshuam rau cov txiaj ntsig.
Cov kev tshawb fawb tau saib cov neeg raug PFOA los ntawm kev nyob ze lossis ua haujlwm hauv cov nroj tsuag tshuaj.Qee qhov kev tshawb fawb no tau qhia tias muaj kev pheej hmoo ntawm qog nqaij hlav qog noj ntshav nrog nce PFOA raug.Cov kev tshawb fawb tseem qhia tau hais tias muaj peev xwm txuas mus rau mob qog noj ntshav hauv lub raum thiab qog nqaij hlav qog noj ntshav, tab sis qhov kev pheej hmoo nce ntxiv tau tsawg thiab tuaj yeem yog vim muaj caij nyoog.
Lwm cov kev tshawb fawb tau qhia tias muaj peev xwm txuas mus rau lwm yam qog noj ntshav, suav nrog prostate, zais zis, thiab qog nqaij hlav zes qe menyuam.Tab sis tsis yog txhua qhov kev tshawb fawb tau pom cov kev sib txuas, thiab kev tshawb fawb ntxiv yog xav tau los qhia meej cov kev tshawb pom no.
Post lub sij hawm: Nov-02-2017