Raws li cov dej haus ntws los ntawm cov kav dej thiab mus rau hauv ib khob, nws khiav tawm ntawm cov roj hmab ntsaws rau hauv qee cov kav dej. Cov khoom no muaj cov khoom siv ntxiv uas ua rau lawv qhov yooj yim thiab ua haujlwm ntev, tab sis cov khoom sib txuas uas tsim kev puas tsuaj tuaj yeem xau rau hauv dej haus, raws li kev tshawb fawb me me hauvEnvironmental Science & Technology Letters. Cov kws sau ntawv tau tshaj tawm tias cov khoom sib xyaw tso tawm, uas feem ntau txuas nrog cov pa phem ntawm lub log tsheb, kuj tau hloov mus rau lwm yam khoom tsis zoo.
Txhawm rau txhim kho roj hmab lub zog thiab ua haujlwm ntev, cov tuam ntxhab feem ntau sib xyaw hauv cov khoom ntxiv. Cov kws tshawb fawb tau pom tias cov plua plav log tsheb tuaj yeem thauj cov khoom no, xws li 1,3 diphenylguanidine (DPG) thiab N-(1,3-dimethylbutyl)-N'-phenyl-1,4-benzenediamine. (6PPD), rau hauv dej. DPG thiab 6PPD kuj tau kuaj pom hauv cov qauv dej haus, txawm hais tias nws tsis paub meej tias cov tebchaw tuaj txog li cas.
Hauv kev tshawb fawb yav dhau los, Shane Snyder thiab Mauricius Marques dos Santos pom tias cov khoom siv roj hmab no tuaj yeem cuam tshuam nrog cov tshuaj tua kab mob hauv cov dej haus simulated. Lawv cov kev kuaj sim tau tsim ntau yam tshuaj chlorinated, qee qhov tuaj yeem ua rau DNA puas. Tam sim no, pab pawg xav ntsuas seb cov khoom siv roj hmab hauv ntiaj teb puas tuaj yeem tso DPG thiab 6PPD thiab tsim cov tshuaj chlorinated byproducts hauv cov qauv dej haus.
Hauv txoj kev tshawb fawb no, pab pawg tau sau cov dej kais dej los ntawm 20 lub tsev thiab kuaj pom cov khoom siv polymer ntxiv ntawm qhov chaw ib trillion qib hauv txhua tus qauv. Cov kws tshawb fawb piav qhia tias cov tshuaj no tsis tau tswj hwm tam sim no, tab sis cov qib ntsuas muaj feem cuam tshuam, raws li lawv cov kev tshawb fawb yav dhau los cov txiaj ntsig los ntawm tib neeg cell bioassays.
Cov qauv los ntawm cov faucets nrog aerators muaj cov nyiaj ntau tshaj plaws. Tag nrho cov qauv muaj DPG thiab ib qho ntawm nws cov chlorinated byproducts, whereas 6PPD thiab ob lwm cov tshuaj chlorine-muaj cov tebchaw tau pom nyob rau hauv tsawg dua tsib cov qauv. Nov yog thawj daim ntawv tshaj tawm ntawm chlorinated DPG byproducts hauv dej haus, raws li cov kws tshawb fawb.