I-Australia yokuqinisa imithetho ejikeleze amanqanaba amkelekileyo eekhemikhali eziphambili zePFAS kumanzi okusela phantsi kwezikhokelo zoyilo

Ziziphi ii-PFAs? Yonke into ekufuneka uyazi
Landela iindaba zethu zebhlog ephilayo eOstreliya ukuze ufumane uhlaziyo lwamva nje
Fumana iindaba zethu ze-imeyile, iapp yasimahla okanye ipodcast yeendaba mihla le

IOstreliya inokuqinisa imithetho malunga namanqanaba amkelekileyo eekhemikhali eziphambili zePFAS kumanzi okusela, ithoba inani lezinto ezibizwa ngokuba ziikhemikhali zanaphakade ezivumelekileyo ilitha nganye.

IBhunga leSizwe lezeMpilo kunye noPhando lwezoNyango ngoMvulo likhuphe izikhokelo eziqulunqiweyo zokuhlaziya imida yeekhemikhali ezine zePFAS emanzini okusela.

I-PFAS (i-per- kunye ne-polyfluoroalkyl substances), iklasi yamawaka aliqela ekhompawundi, ngamanye amaxesha ibizwa ngokuba “ziikhemikhali zanaphakade” njengoko ziqhubeka nokusingqongileyo ixesha elide kwaye kunzima ukutshabalalisa kunezinto ezinjengeswekile okanye iiproteni. Ukuvezwa kwePFAS kubanzi kwaye akuphelelanga kumanzi okusela.

Bhalisela i-imeyile yeendaba ze-Guardian Australia

Izikhokelo eziqulunqiweyo zibeka iingcebiso kwimida yePFAS kumanzi okusela kubomi bomntu.

Ngaphantsi koyilo, umda we-PFOA - i-compound esetyenziselwa ukwenza iTeflon - iya kuthotywa ukusuka kwi-560 ng / L ukuya kwi-200 ng / L, ngokusekelwe kubungqina bemiphumo yabo ebangela umhlaza.

Ngokusekwe kwiinkxalabo ezintsha malunga neziphumo zomongo wethambo, imida yePFOS - ngaphambili isithako esiphambili kwisikhuseli selaphu iScotchgard - siya kunqunyulwa ukusuka kwi-70 ng / L ukuya kwi-4 ng / L.

NgoDisemba wonyaka ophelileyo, i-Arhente yeZizwe ngezizwe yoPhando ngoMhlaza yachaza iPFOA njengebangela umhlaza ebantwini - kudidi olufanayo nokusela utywala kunye nongcoliseko lomoya wangaphandle - kunye nePFOS "enokwenzeka" ye-carcinogenic.

Izikhokelo zikwaphakamisa imida emitsha yeekhompawundi ezimbini ze-PFAS ezisekelwe kubungqina bemiphumo ye-thyroid, ye-30ng / L ye-PFHxS kunye ne-1000 ng / L ye-PFBS. I-PFBS isetyenziswe endaweni yePFOS eScotchgard ukusukela ngo-2023.

Umphathi oyintloko we-NHMRC, uProf Steve Wesselingh, uthe kwinkcazo yeendaba ukuba imida emitsha ibekwe ngokusekelwe kubungqina obuvela kwizifundo zezilwanyana. “Okwangoku asikholelwa ukuba kukho izifundo zabantu ezikumgangatho owaneleyo wokusikhokela ekuphuhliseni la manani,” utshilo.

Umda we-PFOS ocetywayo uya kuhambelana nezikhokelo zase-US, ngelixa umda wase-Australia we-PFOA usaya kuba phezulu.

“Ayiyonto ingaqhelekanga ukuba amaxabiso esikhokelo ahluke kwilizwe ngalinye kwihlabathi liphela ngokusekwe kwiindlela ezahlukeneyo kunye nesiphelo esisetyenziswayo,” utshilo u-Wesseleigh.

I-US ijolise kwi-zero concentrations ye-carcinogenic compounds, ngelixa abalawuli base-Australia bathatha "imodeli ye-threshold".

"Ukuba sifumana ngaphantsi kwelo nqanaba, sikholelwa ukuba akukho mngcipheko waloo nto ibangela ingxaki echongiweyo, ingaba yingxaki ye-thyroid, iingxaki zethambo okanye umhlaza," kusho u-Wesseleigh.

I-NHMRC ithathele ingqalelo ukuseta umda wamanzi okusela odityanisiweyo we-PFAS kodwa yakubona kungenamsebenzi xa inikwa amanani eekhemikhali ze-PFAS. “Maninzi kakhulu amanani ePFAS, kwaye asinalo ulwazi lwetyhefu kuninzi lwabo,” utshilo uGqirha David Cunliffe, umcebisi oyintloko womgangatho wamanzi kwisebe lezempilo loMzantsi Afrika. "Sithathe le ndlela yokuvelisa amaxabiso esikhokelo somntu ngamnye kwezo PFAS apho kukho idatha ekhoyo."

Ulawulo lwePFAS lwabelwana phakathi korhulumente wobumbano kunye norhulumente kunye nemimandla, elawula ukunikezelwa kwamanzi.

UGqr Daniel Deere, umcebisi wamanzi kunye nezempilo kwi-Water Futures, uthe abantu base-Australia babengekho isidingo sokukhathazeka nge-PFAS kumanzi okusela kawonkewonke ngaphandle kokuba baziswe ngokuthe ngqo. “Sinethamsanqa eOstreliya kuba asinawo nawaphi na amanzi achatshazelwa yiPFAS, kwaye kufuneka ukhathazeke kuphela xa ucetyiswa ngokuthe ngqo ngabasemagunyeni.

Ngaphandle kokuba kucetyiswe ngenye indlela, "kwakungekho xabiso ekusebenziseni imithombo yamanzi engenye, njengamanzi asebhotileni, iinkqubo zokucocwa kwamanzi asekhaya, izihlungi zamanzi e-benchtop, iitanki zamanzi emvula zendawo okanye ibhore," kusho uDeere kwingxelo.

"Abantu base-Australia banokuqhubeka beziva benethemba lokuba i-Australian Drinking Water Guidelines idibanisa isayensi yakutshanje kunye neyona nto inamandla ukuqinisa ukhuseleko lwamanzi okusela," uProf Stuart Khan, intloko yeSikole sobuNjineli boLuntu kwiYunivesithi yaseSydney, kwingxelo.

I-NHMRC ibeke phambili ukuhlaziywa kwezikhokelo zase-Australia kwi-PFAS emanzini okusela ngasekupheleni kwe-2022. Izikhokelo azizange zihlaziywe ukususela kwi-2018.

Izikhokelo ezisayilwayo ziza kuhlala zingekho ukuze kuboniswane noluntu kude kube ngowama-22 kuNovemba.

Ngapha koko, sinokusebenzisa izinzwa zomgangatho wamanzi ukubona umgangatho wamanzi, sinokubonelela ngeendlela ezahlukeneyo zokuvavanya iiparamitha ezahlukeneyo emanzini kwireferensi yakho.