Dioxane? Nws tsuas yog ib qho teeb meem ntawm kev ntxub ntxaug xwb

Dioxane yog dab tsi? Nws los qhov twg los?

Dioxane, txoj kev sau kom raug yog dioxane. Vim tias qhov phem nyuaj rau ntaus, hauv tsab xov xwm no peb yuav siv cov lus phem ib txwm hloov. Nws yog ib qho organic compound, tseem hu ua dioxane, 1, 4-dioxane, kua tsis muaj xim. Dioxane mob hnyav yog qhov tsis muaj tshuaj lom, muaj cov teebmeem loog thiab txhawb zog. Raws li Txoj Cai Kev Nyab Xeeb Kev Siv Tshuaj Pleev Xim tam sim no hauv Suav teb, dioxane yog ib qho khoom txwv tsis pub siv hauv cov tshuaj pleev xim. Vim tias nws raug txwv tsis pub ntxiv, vim li cas cov tshuaj pleev xim tseem muaj kev kuaj pom dioxane? Vim yog cov laj thawj uas tsis zam tau, nws muaj peev xwm ua rau dioxane raug coj mus rau hauv cov tshuaj pleev xim ua qhov tsis huv. Yog li cov khoom tsis huv hauv cov khoom siv raw yog dab tsi?

Ib qho ntawm cov khoom xyaw ntxuav uas siv dav tshaj plaws hauv cov tshuaj zawv plaub hau thiab cov tshuaj ntxuav lub cev yog sodium fatty alcohol ether sulfate, tseem hu ua sodium AES lossis SLES. Cov khoom no tuaj yeem ua los ntawm cov roj xibtes ntuj lossis roj av ua cov khoom siv raw rau hauv cov cawv rog, tab sis nws yog synthesized los ntawm ntau cov kauj ruam xws li ethoxylation, sulfonation, thiab neutralization. Cov kauj ruam tseem ceeb yog ethoxylation, hauv cov kauj ruam no ntawm cov txheej txheem tshuaj tiv thaiv, koj yuav tsum siv cov khoom siv raw ntawm ethylene oxide, uas yog cov khoom siv raw monomer siv dav hauv kev lag luam tshuaj synthesis, hauv cov txheej txheem ntawm ethoxylation tshuaj tiv thaiv, ntxiv rau kev ntxiv ethylene oxide rau cov cawv rog los tsim cov cawv rog ethoxylated, Kuj tseem muaj ib feem me me ntawm ethylene oxide (EO) ob ob lub molecule condensation los tsim cov khoom by-product, uas yog, tus yeeb ncuab ntawm dioxane, qhov tshuaj tiv thaiv tshwj xeeb tuaj yeem pom hauv daim duab hauv qab no:

Feem ntau, cov chaw tsim khoom siv raw yuav muaj cov kauj ruam tom qab los cais thiab ntxuav cov dioxane, cov chaw tsim khoom siv raw sib txawv yuav muaj cov qauv sib txawv, cov chaw tsim khoom siv tshuaj pleev ib ce thoob ntiaj teb kuj yuav tswj hwm qhov ntsuas no, feem ntau yog li 20 txog 40ppm. Raws li cov ntsiab lus txheem hauv cov khoom tiav (xws li tshuaj zawv plaub hau, tshuaj ntxuav lub cev), tsis muaj cov cim qhia thoob ntiaj teb tshwj xeeb. Tom qab qhov xwm txheej tshuaj zawv plaub hau Bawang hauv xyoo 2011, Tuam Tshoj tau teeb tsa tus qauv rau cov khoom tiav ntawm tsawg dua 30ppm.

Dioxane ua rau mob qog noj ntshav, puas yog nws ua rau muaj kev txhawj xeeb txog kev nyab xeeb?

Ua ib yam khoom siv raw siv txij li Tsov Rog Thoob Ntiaj Teb Zaum Ob, sodium sulfate (SLES) thiab nws cov khoom lag luam dioxane tau raug kawm ntau yam. Lub Koom Haum Saib Xyuas Khoom Noj thiab Tshuaj ntawm Tebchaws Meskas (FDA) tau kawm txog dioxane hauv cov khoom siv rau cov neeg siv khoom tau 30 xyoo, thiab Health Canada tau xaus lus tias qhov muaj cov dioxane me me hauv cov khoom siv pleev ib ce tsis ua rau muaj kev pheej hmoo rau kev noj qab haus huv rau cov neeg siv khoom, txawm tias cov menyuam yaus (Canada). Raws li Australian National Occupational Health and Safety Commission, qhov txwv zoo tshaj plaws ntawm dioxane hauv cov khoom siv rau cov neeg siv khoom yog 30ppm, thiab qhov txwv siab tshaj plaws ntawm kev siv tshuaj lom yog 100ppm. Hauv Suav teb, tom qab xyoo 2012, tus qauv txwv ntawm 30ppm rau cov ntsiab lus dioxane hauv cov tshuaj pleev ib ce yog tsawg dua qhov txwv siab tshaj plaws ntawm 100ppm raws li cov xwm txheej siv ib txwm muaj.

Ntawm qhov tod tes, nws yuav tsum tau hais meej tias Tuam Tshoj txoj kev txwv ntawm dioxane hauv cov qauv tshuaj pleev ib ce yog tsawg dua 30ppm, uas yog tus qauv siab hauv ntiaj teb. Vim tias qhov tseeb, ntau lub tebchaws thiab thaj chaw muaj kev txwv ntau dua rau cov ntsiab lus dioxane dua li peb tus qauv lossis tsis muaj cov qauv meej:

Qhov tseeb, cov dioxane me me kuj muaj ntau nyob rau hauv xwm. Lub Chaw Sau Npe Tshuaj Lom thiab Kab Mob hauv Tebchaws Meskas teev cov dioxane tias pom muaj nyob rau hauv nqaij qaib, txiv lws suav, cw thiab txawm tias nyob rau hauv peb cov dej haus. Cov Lus Qhia Txog Kev Zoo ntawm Dej Haus ntawm Lub Koom Haum Kev Noj Qab Haus Huv Ntiaj Teb (tsab thib peb) hais tias qhov txwv ntawm dioxane hauv dej yog 50 μg / L.

Yog li ntawd, txhawm rau sau cov teeb meem carcinogenic ntawm dioxane hauv ib kab lus, uas yog: tsis hais txog koob tshuaj los tham txog qhov kev puas tsuaj yog tus neeg rogue.

Cov ntsiab lus ntawm dioxane qis dua, qhov zoo dua, puas yog?

Dioxane tsis yog tib qho cim qhia txog qhov zoo ntawm SLES xwb. Lwm cov cim qhia xws li qhov ntau ntawm cov tshuaj unsulfonated thiab qhov ntau ntawm cov tshuaj ua rau khaus hauv cov khoom kuj tseem ceeb uas yuav tsum xav txog.

Tsis tas li ntawd xwb, nws tseem ceeb heev uas yuav tsum nco ntsoov tias SLES kuj muaj ntau qhov sib txawv, qhov sib txawv loj tshaj plaws yog qib ntawm ethoxylation, qee qhov muaj 1 EO, qee qhov muaj 2, 3 lossis txawm tias 4 EO (ntawm chav kawm, cov khoom nrog cov lej lej xws li 1.3 thiab 2.6 kuj tuaj yeem tsim tau). Qhov siab dua ntawm qib ntawm kev nce ethoxidation, uas yog, qhov siab dua ntawm tus lej ntawm EO, qhov siab dua ntawm cov ntsiab lus ntawm dioxane tsim tawm nyob rau hauv tib txoj kev thiab cov xwm txheej kev ntxuav.

Txawm li cas los xij, qhov txaus nyiam yog vim li cas thiaj ua rau EO ntau ntxiv yog kom txo qhov khaus ntawm surfactant SLES, thiab tus lej ntau dua ntawm EO SLES, qhov khaus tsawg dua rau daim tawv nqaij, uas yog, qhov mos dua, thiab rov ua dua. Yog tsis muaj EO, nws yog SLS, uas cov khoom xyaw tsis nyiam, uas yog cov khoom xyaw txhawb zog heev.

Yog li ntawd, cov ntsiab lus tsawg ntawm dioxane tsis tau txhais hais tias nws yog ib qho khoom siv zoo. Vim tias yog tias tus lej ntawm EO me me, qhov khaus ntawm cov khoom siv raw yuav ntau dua

Hauv LUS QHIA:

Dioxane tsis yog ib yam khoom xyaw uas cov tuam txhab lag luam ntxiv, tab sis yog ib yam khoom siv raw uas yuav tsum nyob hauv cov khoom siv raw xws li SLES, uas nyuaj rau zam. Tsis yog hauv SLES xwb, qhov tseeb, tsuav yog ethoxylation ua tiav, yuav muaj cov dioxane me me, thiab qee cov khoom siv raw khoom siv rau kev saib xyuas tawv nqaij kuj muaj dioxane. Los ntawm qhov kev xav ntawm kev ntsuam xyuas kev pheej hmoo, ua ib yam khoom seem, tsis tas yuav nrhiav cov ntsiab lus 0 kiag li, siv cov thev naus laus zis tam sim no, "tsis pom" tsis txhais tau tias cov ntsiab lus yog 0.

Yog li, tham txog kev puas tsuaj dhau qhov koob tshuaj yog ua neeg phem. Kev nyab xeeb ntawm dioxane tau kawm txog ntau xyoo, thiab kev nyab xeeb thiab cov qauv pom zoo tau tsim, thiab cov seem tsawg dua 100ppm raug suav hais tias muaj kev nyab xeeb. Tab sis cov teb chaws xws li European Union tsis tau ua rau nws yog tus qauv yuav tsum ua. Cov kev cai hauv tsev rau cov ntsiab lus ntawm dioxane hauv cov khoom yog tsawg dua 30ppm.

Yog li ntawd, cov dioxane hauv tshuaj zawv plaub hau tsis tas yuav txhawj txog mob qog noj ntshav. Raws li qhov kev qhia tsis tseeb hauv xov xwm, koj tam sim no nkag siab tias nws tsuas yog kom tau txais kev mloog xwb.