Tsis ntev los no, ib txoj kev tshawb fawb los ntawm McGill University hauv Canada tau qhia tias lub hnab tshuaj yej tso tawm kaum tawm lab tus yas hais thaum qhov kub thiab txias.Nws tau kwv yees tias txhua khob tshuaj yej brewed los ntawm txhua lub hnab tshuaj yej muaj 11.6 billion microplastics thiab 3.1 billion nanoplastic hais.Txoj kev tshawb no tau luam tawm nyob rau hauv American Journal of Environmental Science thiab Technology rau lub Cuaj Hlis 25.
Lawv tau xaiv plaub lub hnab yas tshuaj yej: ob lub hnab nylon thiab ob lub hnab PET.Tshwj xeeb, PET tuaj yeem siv rau hauv qhov kub ntawm 55-60 ℃ ntev, thiab tuaj yeem tiv taus qhov kub ntawm 65 ℃ thiab qis kub ntawm - 70 ℃ rau lub sijhawm luv luv, thiab tsis tshua muaj kev cuam tshuam rau nws cov khoom siv kho tshuab ntawm qhov kub thiab txias.Muab cov tshuaj yej pov tseg, ntxuav lub hnab nrog dej huv, thiab tom qab ntawd simulate cov txheej txheem ntawm cov tshuaj yej brewing, thiab tsau lub hnab ntim nrog dej kub 95 ℃ rau 5 feeb.Nws yog qhov pom tseeb tias cov dej uas peb brew tshuaj yej yog boiling dej, thiab qhov kub thiab txias yog siab tshaj qhov siv ntau yam ntawm PET.
McGill qhov kev paub tseeb qhia tau hais tias ntau cov khoom yas yuav raug tso tawm ua ntej.Ib lub khob tshuaj yej tuaj yeem tso tawm txog 11.6 billion microns thiab 3.1 billion nanometers ntawm cov khoom yas!Tsis tas li ntawd, seb cov khoom yas tso tawm no puas muaj tshuaj lom rau cov kab mob.Txhawm rau kom nkag siab txog cov tshuaj lom lom lom neeg, cov kws tshawb fawb tau siv cov dej fleas, ib qho kev tsis sib xws, uas yog cov qauv kab mob uas siv los ntsuas cov co toxins hauv ib puag ncig.Qhov siab dua qhov concentration ntawm cov tshuaj yej hnab, qhov tsawg dua cov dej flea ua luam dej.Tau kawg, cov hlau hnyav + yas yog qhov phem dua li cov yas ntshiab.Thaum kawg, dej flea tsis tuag, tab sis nws deformed.Txoj kev tshawb no xaus lus tias seb cov tshuaj yej hnab yas puas cuam tshuam rau tib neeg kev noj qab haus huv xav tau kev tshawb fawb ntxiv.
Post lub sij hawm: Feb-14-2023