Rolf Halden, tus thawj coj ntawm Lub Tsev Haujlwm Saib Xyuas Kev Noj Qab Haus Huv Environmental Engineering ntawm Biodesign Institute ntawm Arizona State University hais tias "Qhov kub kub, cov yas ntau tuaj yeem ua rau hauv cov zaub mov lossis dej haus,".
Cov khoom yas feem ntau tso cov tshuaj me me rau hauv cov dej haus lossis cov khoom noj uas lawv muaj. Raws li qhov kub thiab txias lub sij hawm raug nce, cov tshuaj bonds nyob rau hauv cov yas yog ntau thiab ntau tawg, thiab cov tshuaj muaj feem ntau yuav xaus rau hauv cov zaub mov los yog dej. Raws li US Food and Drug Administration (FDA), cov tshuaj tso tawm tsawg dhau los ua rau muaj teeb meem kev noj qab haus huv, tab sis nyob rau lub sijhawm ntev, cov tshuaj me me tuaj yeem ua rau muaj teeb meem loj.
Lub raj mis pov tseg rau hnub kub lub caij ntuj sov
Feem ntau cov fwj dej uas koj pom ntawm lub khw muag khoom yog tsim los ntawm cov yas hu ua polyethylene terephthalate (PET). Ib txoj kev tshawb fawb xyoo 2008 los ntawm Arizona State University cov kws tshawb fawb tau pom tias yuav ua li cas kom sov li sai tau qhov tso tawm antimony los ntawm PET yas. Antimony yog siv los ua cov yas thiab tuaj yeem ua rau muaj tshuaj lom nyob rau hauv cov koob tshuaj siab.
Hauv kev sim hauv chav sim, nws siv 38 hnub rau cov fwj dej kub txog 65 degrees txhawm rau txheeb xyuas cov qib antimony uas dhau cov lus qhia kev nyab xeeb. Julia Taylor, tus kws tshawb fawb txog plastics ntawm University of Missouri sau hais tias "Lub tshav kub pab cuam tshuam cov tshuaj lom neeg hauv cov yas, xws li lub raj mis yas, thiab cov tshuaj no tuaj yeem txav mus rau hauv cov dej haus uas lawv muaj," sau Julia Taylor, tus kws tshawb fawb plastics ntawm University of Missouri.
Hauv xyoo 2014, cov kws tshawb fawb pom muaj cov kab mob antimony siab thiab cov tshuaj lom neeg hu ua BPA hauv cov dej muag hauv Suav dej fwj. Hauv xyoo 2016, cov kws tshawb fawb pom muaj qib siab ntawm antimony hauv lub raj mis dej muag hauv Mexico. Ob qho kev tshawb fawb tau sim dej ntawm cov xwm txheej ntau dua 65 °, uas yog qhov xwm txheej phem tshaj plaws.
Raws li International Bottled Water Association kev lag luam pab pawg, cov dej hauv lub raj mis yuav tsum tau muab khaws cia rau hauv cov xwm txheej zoo ib yam li lwm yam khoom noj. “Lub raj mis ua lub luag haujlwm tseem ceeb hauv kev kub ntxhov. Yog tias koj nyob rau ntawm lub cev qhuav dej, nws tsis muaj teeb meem dab tsi hauv dej. Tab sis rau cov neeg siv khoom nruab nrab, kev siv lub hwj yas yuav tsis muaj txiaj ntsig, "Halden hais.
Yog li, lub raj mis yas yuav tsum tsis txhob raug lub hnub ci ci rau lub sijhawm ntev, thiab tseem yuav tsum tsis txhob tso rau hauv lub tsheb thaum lub caij ntuj sov.
Yuav ua li cas yog reusable ntim?
Recyclable water fwj feem ntau yog tsim los ntawm high-density polyethylene (HDPE) los yog polycarbonate. HDPE feem ntau tau txais los ntawm cov kev pabcuam rov ua dua tshiab, tsis zoo li polycarbonate.
Txhawm rau ua kom cov fwj no nyuaj thiab ci, cov neeg tsim khoom feem ntau siv Bisphenol-A lossis BPA. BPA yog qhov cuam tshuam endocrine. Qhov no txhais tau hais tias nws tuaj yeem cuam tshuam kev ua haujlwm hormonal ib txwm thiab ua rau muaj teeb meem kev noj qab haus huv txaus ntshai. Kev tshawb fawb txuas BPA rau mob qog noj ntshav mis. US Food and Drug Administration (FDA) txwv tsis pub siv BPA hauv cov fwj menyuam mos thiab cov fwj uas tsis muaj dej. Ntau lub tuam txhab tau teb rau cov kev txhawj xeeb ntawm cov neeg siv khoom los ntawm kev tshem tawm BPA.
Taylor hais tias "tsis muaj BPA tsis tas txhais tau tias muaj kev nyab xeeb," Taylor hais. Nws tau sau tseg tias bisphenol-S, uas feem ntau siv los ua lwm txoj hauv kev, yog "zoo ib yam li BPA thiab muaj cov khoom zoo sib xws."
Cov kev pheej hmoo siab npaum li cas?
“Yog tias koj haus ib lub raj mis PET ib hnub, nws puas yuav ua rau koj noj qab haus huv? Tej zaum tsis yog, "hais tias Halden. "Tab sis yog tias koj haus 20 fwj ib hnub, ces lo lus nug ntawm kev nyab xeeb yog txawv kiag li." Nws sau tseg tias cov txiaj ntsig sib xyaw muaj qhov cuam tshuam loj tshaj plaws rau kev noj qab haus huv.
Tus kheej, Halden nyiam lub raj mis dej hlau hla lub hnab yas rov siv tau thaum nws tsoo txoj kev. "Yog tias koj tsis xav tau cov yas hauv koj lub cev, tsis txhob nce nws hauv zej zog," nws hais.