O le PVC sa avea muamua ma palasitika sili ona tele i le lalolagi i le gaosiga ma fa'aaogaina lautele. E faʻaaogaina lautele i mea faufale, oloa gaosi oloa, mea e manaʻomia i aso taʻitasi, paʻu fola, fola fola, paʻu faʻapitoa, paipa, uaea ma uaea, afifiina ata tifaga, fagu, mea faʻafefe, mea faʻamaufaʻailoga, filo, ma isi fanua.
Ae ui i lea, ia Oketopa 27, 2017, o le lisi o mea faʻamaʻi na lomia e le International Agency for Research on Cancer a le Faalapotopotoga o le Soifua Maloloina a le Lalolagi (WHO) na muai tuufaatasia ma faʻasino, ma o le PVC na aofia i le lisi o le Vasega 3 carcinogen.Vinyl chloride, e pei o le mea mata mo le PVC synthesis, o loʻo lisiina i le lisi o le Vasega I carcinogen.
01 Puna'oa o vaila'au vinyl chloride i oloa seevae
Vinyl chloride, lea e ta'ua foi o le vinyl chloride, o se fa'alapotopotoga fa'aola fa'atasi ma le fua fa'atatau C2H3Cl. Ose monomer taua ile kemisi polymer ma e mafai ona maua mai le ethylene poʻo le acetylene. E masani ona faʻaaogaina e gaosia ai homopolymers ma copolymers o polyvinyl chloride. E mafai foi ona kopiina ma le vinyl acetate, butadiene, ma isi, ma e mafai foifa'aaogaina e fai ma mea e fa'afefeteina mo vali ma mea manogi.E mafai foi ona faʻaaogaina e fai ma comonomer mo polymers eseese. E ui lava o le vinyl chloride o se mea taua tele i totonu o pisinisi palasitika, e mafai foi ona faʻaaogaina e avea o se pusaaisa, ma isi. I le gaosiga o seevae ma lavalava, vinyl chloride e faʻaaogaina e gaosia ai le polyvinyl chloride (PVC) ma vinyl polymers, lea e mafai ona faigata pe faʻafefeteina mea. O fa'aoga fa'aogaina ole PVC e aofia ai le lomitusi palasitika, vaega palasitika, ma fa'alavalava eseese ile pa'u, pa'u synthetic, ma ie.
O le totoe o le vinyl chloride monomer i mea faʻapipiʻi mai le vinyl chloride e mafai ona tuʻuina malie i totonu o meafaitino, lea e iai se aʻafiaga i le soifua maloloina o tagata faʻatau ma le siʻosiʻomaga.
02 Tulaga lamatia o vailaau vinyl chloride
Vinyl chloride e mafai ona auai i le photochemical smog reactions i totonu o le siosiomaga, ae ona o lona malosi malosi, e faigofie i photolysis i le siosiomaga. Vinyl chloride monomer e mafua ai ni lamatiaga eseese i tagata faigaluega ma tagata faʻatau, e faʻatatau i le ituaiga monomer ma le auala faʻaalia. Chloroethylene o se kasa e leai ni lanu i le vevela o le potu, ma sina suamalie e tusa ma le 3000 ppm. O le fa'aalia tele (pu'upu'u) i le maualuga o le vinyl chloride i le ea e mafai ona i ai ni a'afiaga i le fatugalemu o le tino (CNS),e pei o le niniva, tulemoe, ma le tiga o le ulu. O le manava umi ma le aafia i le vinyl chloride e ono mafua ai le kanesa o le ate.
I le taimi nei, o loʻo taulaʻi atu maketi a Europa ma Amerika i le faʻaaogaina o vinyl chloride monomers i mea PVC ma a latou meafaitino, ma faʻatinoina tulafono faʻatonutonu. Ole tele o fa'ailoga fa'avaomalo ta'uta'ua e mana'omia le fa'asaina o mea PVC ile latou oloa fa'atau. Afai e manaʻomia le PVC poʻo mea o loʻo i ai le PVC ona o mafuaʻaga faʻatekonolosi, e tatau ona pulea mea o loʻo i totonu o le vinyl chloride monomers i mea. O le International RSL Management Working Group for La'ei ma seevae AFIRM, 7th Edition 2022, e mana'omia lenae le tatau ona sili atu i le 1ppm le anotusi VCM i meafaitino.
E tatau i tagata gaosi oloa ma atinaʻe ona faʻamalosia le puleaina o filifili sapalai,faʻatasi ai ma le faʻapitoa e taulaʻi ma faʻatonutonu mea o loʻo i totonu o le vinyl chloride monomers i mea PVC, lolomi palasitika palasitika, vaega palasitika, ma faʻapipiʻi PVC eseese i luga o paʻu, paʻu synthetic, ma ie.. I le taimi lava e tasi, e tatau foi ona gauai atu i le faʻaogaina o gaioiga o gaosiga, faʻaleleia le lelei o le pulega, ma faʻaleleia atili le tulaga o le saogalemu o oloa ma le lelei e tausisia manaʻoga talafeagai.
Taimi meli: Apr-14-2023