Thaum Lub Kaum Hli 17, 2013, Lub Chaw Haujlwm Saib Xyuas Kev Tshawb Fawb Thoob Ntiaj Teb rau Cancer, lub chaw haujlwm ntawm Lub Koom Haum Saib Xyuas Kev Noj Qab Haus Huv Ntiaj Teb tau tshaj tawm thawj zaug tias huab cua muaj kuab paug yog carcinogenic rau tib neeg, thiab cov khoom tseem ceeb ntawm huab cua muaj kuab paug yog cov teeb meem.
Nyob rau hauv ib puag ncig ntuj, cov khoom me me hauv huab cua feem ntau suav nrog cov xuab zeb thiab hmoov av coj los ntawm cua, volcanic tshauv ejected los ntawm volcanic eruptions, pa taws thiab hmoov av los ntawm hluav taws kub hav zoov, hiav txwv ntsev evaporated los ntawm seawater raug tshav ntuj, thiab paj ntoos ntawm cov nroj tsuag.
Nrog rau txoj kev loj hlob ntawm tib neeg lub neej thiab kev nthuav dav ntawm industrialization, tib neeg kev ua ub no kuj emit ib tug loj npaum li cas ntawm cov teeb meem nyob rau hauv cov huab cua, xws li soot los ntawm ntau yam kev lag luam txheej txheem xws li hluav taws xob tsim, metallurgy, roj av, thiab chemistry, ua noj fumes, pa tawm los ntawm lub hwj chim. tsheb, haus luam yeeb thiab lwm yam.
Cov teeb meem hauv huab cua yuav tsum muaj kev txhawj xeeb tshaj plaws txog kev nqus cov pa paug, uas yog hais txog cov khoom me me uas muaj qhov sib npaug aerodynamic txoj kab uas hla tsawg dua 10 μm, uas yog PM10 peb feem ntau hnov txog, thiab PM2.5 tsawg dua 2.5 μm. .
Thaum huab cua nkag mus rau tib neeg txoj kev ua pa, qhov ntswg cov plaub hau thiab qhov ntswg mucosa feem ntau tuaj yeem thaiv feem ntau ntawm cov khoom, tab sis cov hauv qab PM10 tsis tuaj yeem.PM10 tuaj yeem khaws cia rau hauv cov hlab ntsws sab saud, thaum PM2.5 tuaj yeem nkag ncaj qha rau hauv bronchioles thiab alveoli.
Vim nws qhov loj me thiab qhov loj ntawm qhov chaw, cov khoom me me yog feem ntau yuav adsorb lwm yam tshuaj, yog li ua rau nws cov kab mob sib txawv, tab sis qhov tseem ceeb tshaj plaws yog tias nws tuaj yeem ua rau mob plawv, kab mob ua pa thiab mob ntsws cancer.
PM2.5, uas peb feem ntau mob siab txog, qhov tseeb suav rau ib feem me me ntawm cov pa nqus tau pa, tab sis vim li cas thiaj them nyiaj ntau rau PM2.5?
Tau kawg, ib qho yog vim kev tshaj tawm xov xwm, thiab lwm qhov yog tias PM2.5 yog qhov zoo dua thiab yooj yim dua los nqus cov pa phem thiab cov hlau hnyav xws li polycyclic aromatic hydrocarbons, uas ua rau muaj qhov tshwm sim ntawm carcinogenic, teratogenic, thiab mutagenic.
Lub sij hawm xa tuaj: Mar-16-2022