1. Kev pheej hmoo ntawm Microplastics
- Tsis ntev los no, cov kws tshawb fawb ntawm McGill University tau pom tias qee lub hnab yas mesh tshuaj yej feem ntau siv los ntawm cov npe hwm yuav ua rau muaj kev phom sij. Lawv txoj kev tshawb fawb tau luam tawm nyob rau hauv American Chemical Society journal Environmental Science thiab Technology, tsom rau plaub lub hnab yas mesh tshuaj yej sib txawv. Tom qab tshem tawm cov tshuaj yej tawg los ntawm lub hnab tshuaj yej thiab muab tso rau hauv dej kub rau 95 degrees Celsius, cov kws tshawb fawb tau xav tsis thoob thaum pom tias txhua lub hnab tshuaj yej tso tawm txog 11.6 billion microplastics thiab 3.1 billion txawm tias me nanoplastics. Cov txiaj ntsig no yog ntau txhiab zaus ntau dua li cov ntsiab lus yas yav dhau los qhia hauv lwm cov khoom noj. Microplastics yog cov khoom yas tsawg dua 5 hli ntev, thiab nanoplastics yog cov khoom yas tsawg dua 100 nanomicrometers ntev, thaum 1 nanomicrometer yog sib npaug rau ib lab ntawm 1 hli, thiab cov tuab ntawm tib neeg cov plaub hau yog li 75, {{11} } nanomicrometers.
2. Qhov chaw thiab qhov cuam tshuam ntawm microplastics
- Microplastics feem ntau yog los ntawm kev tsim khoom thiab ntim kev lag luam, tab sis kuj tuaj yeem los ntawm cov khaub ncaws fibers lossis microbeads (cov khoom me dua 1 hli, uas tuaj yeem muab ntxiv rau cov tshuaj pleev ib ce rau exfoliation lossis ntxiv rau cov tshuaj kom lawv nqos tau yooj yim). Nyob rau hauv cov ntaub ntawv ntawm cov tshuaj yej hnab, "secondary" microplastics yog tsim thaum cov yas loj dua degrade mus rau tsawg tshaj li 5 hli los ntawm cov tshuaj los yog lub cev txheej txheem nyob rau hauv lub sij hawm. Pab pawg McGill University ntseeg tias cov dej uas nyob ze yuav ua rau muaj cov microplastics ntau dua tso rau hauv cov dej haus. Kev noj cov microplastics tuaj yeem cuam tshuam rau kev noj qab haus huv. Txawm hais tias cov kev phom sij tshwj xeeb tseem tsis tau nkag siab tag nrho, microplastics tuaj yeem cuam tshuam rau lub cev kev ua haujlwm ntawm tib neeg lub cev tom qab nkag mus rau tib neeg lub cev. Piv txwv li, lawv tuaj yeem nqa qee yam tshuaj phem, lossis sib sau hauv lub cev thiab cuam tshuam rau kev ua haujlwm ntawm lub cev.
3. Kev sib txawv thiab kev tsis sib haum xeeb
- Txawm hais tias cov txiaj ntsig kev tshawb fawb zoo li no, kuj tseem muaj qee qhov kev xav sib txawv. Ntawm qhov tod tes, qee cov neeg ntseeg tias txawm hais tias lub hnab ntim tshuaj yej tso tawm ntau cov microplastics hauv kev sim, hauv kev haus dej txhua hnub, tus nqi ntawm microplastics noj los ntawm tib neeg lub cev yuav tsawg, thiab nws tsis paub meej tias nws yuav mus txog qhov twg. theem ntawm kev puas tsuaj loj heev rau kev noj qab haus huv. Ntawm qhov tod tes, feem ntau ntawm cov kev tshawb fawb tam sim no tau ua nyob rau hauv cov kev sim tshwj xeeb, uas tej zaum yuav txawv ntawm qhov tseeb tshuaj yej-brewing scene. Piv txwv li, yam xws li lub sij hawm brewing thiab stability ntawm dej kub yuav txawv heev nyob rau hauv lub neej tiag tiag, uas yuav cuam tshuam rau kev tso tawm ntawm microplastics.
IV. Kev ntsuas thiab cov lus pom zoo
- Yog tias cov neeg siv khoom txhawj xeeb txog kev nyab xeeb ntawm cov hnab tshuaj yej mesh, lawv tuaj yeem txiav txim siab xaiv qee lub hnab tshuaj yej uas tsis yog yas, xws li cov hnab ntawv tshuaj yej. Qee lub hnab ntim tshuaj yej high-end siv cov khoom siv degradable, uas tuaj yeem zam qhov kev pheej hmoo ntawm microplastic tso tawm thaum ua kom yooj yim ntawm cov tshuaj yej brewing. Tsis tas li ntawd, rau cov neeg siv khoom uas nyiam cov tshuaj yej xoob xoob, brewing xoob tshuaj yej ncaj qha kuj yog ib qho kev xaiv zoo, uas tuaj yeem zam tag nrho cov kev pheej hmoo microplastic uas cov hnab tshuaj yej tuaj yeem nqa. Nyob rau tib lub sijhawm, cov cai tswjfwm tseem ceeb yuav tsum ntxiv dag zog rau kev saib xyuas cov khoom ntim tshuaj yej, tsim cov qauv nruj, txwv tsis pub tso cov microplastics hauv cov hnab tshuaj yej, lossis txhawb cov tuam txhab tshuaj yej hnab kom siv cov ntaub ntawv zoo dua.
