I-United States iya kuphumeza iimfuno ezongezelelweyo zokubhengezwa kwezinto ze-329 PFAS

NgoJanuwari 27, 2023, i-Arhente yoKhuseleko lweNdalo yase-US (i-EPA) iphakamise ukuphunyezwa koMthetho oMtsha oBalulekileyo wokuSetyenziswa (i-SNUR) kwizinto ezingasebenziyo zePFAS ezidweliswe phantsi koMthetho woLawulo lweZinto ezinobutyhefu (TSCA).

Emva kwesithuba esiphantse sibe ngunyaka wengxoxo kunye neengxoxo, lo mgaqo wolawulo uye waphunyezwa ngokusemthethweni nge-8 kaJanuwari 2024!
1. Izinto ezingasebenziyo
Izinto ezingasebenziyo kuluhlu lwe-TSCA zibhekisa kwizinto zekhemikhali ezingekaveliswa, zingeniswe ngaphandle, okanye zisetyenzwe e-United States ukususela nge-21 kaJuni ka-2006.
Ngokubanzi, ezo khemikhali azifuni uvavanyo olupheleleyo lwe-EPA kunye nesisombululo somngcipheko ukuze uqalise kwakhona imveliso, ukungenisa elizweni, kunye nokuqhuba imisebenzi yorhwebo ngaphakathi e-United States.
Ngokwaziswa kwemigaqo-nkqubo yolawulo yamva nje, inkqubo yokuqalisa kwakhona ukuveliswa kwezinto ezingasebenziyo ze-PFAS e-United States iya kutshintsha.
2. Imvelaphi yamanyathelo aziswayo
I-EPA ithathela ingqalelo ukuba ukuba izinto zePFAS ezingasebenziyo zivumelekile ukuba ziphinde ziqalise ukuvelisa kunye neminye imisebenzi ngaphandle kovavanyo olupheleleyo kunye nesisombululo somngcipheko, ngokuqinisekileyo iya kubangela ingozi kwimpilo yabantu kunye nokusingqongileyo.

Ke ngoko, i-EPA igqibe kwelokuba ezo zinto kufuneka zingene kwiSibhengezo esiBalulekileyo sokuSetyenziswa okutsha (SNUN) ngaphambi kokuba kuqaliswe kwakhona imveliso kunye neminye imisebenzi. Umvakalisi kufuneka angenise ulwazi malunga nokusetyenziswa kwabo, ukuvezwa, kunye nokukhululwa ngaphakathi kwe-United States kwi-EPA ukuze ihlolwe, kwaye inqume ukuba ingaba iya kubangela ingozi engalawulekiyo kwimpilo yabantu kunye nokusingqongileyo ngaphambi kokusetyenziswa.
3. Zeziphi izinto eziza kujongana nemilinganiselo yokulawula
Lo mgaqo-nkqubo wolawulo ubandakanya izinto ezingama-329 ezingasebenziyo zePFAS.
Izinto ezingama-299 zidweliswe kuluhlu, kwaye iinkampani zinokuziqinisekisa ngolwazi olufana neenombolo zeCAS. Kodwa kusekho izinto ezingama-30 ezingadweliswanga ngokucacileyo ngenxa yokubandakanyeka kwazo kwizicelo ze-CBI. Ukuba imathiriyeli yeshishini idibana nezi nkcazo zilandelayo ze-PFAS, kuyafuneka ukuba kungeniswe isiqinisekiso sokukhangela into entsha kwi-EPA:
R - (CF2) - CF (R ') R', apho zombini i-CF2 kunye ne-CF ziyi-saturated carbon;
R-CF2OCF2-R ', apho i-R kunye ne-R' ingaba ngu-F, O, okanye i-carbon saturated;
CF3C (CF3) R'R '', apho u-R 'kunye no-R' 'inokuba ngu-F okanye i-saturated carbon.
ILebhu yoVavanyo lwe-BTF liziko lovavanyo elivunyiweyo yiNkonzo yeSizwe yoQinisekiso lwaseTshayina yoVavanyo lokuThobela (CNAS), inombolo: L17568. Emva kweminyaka yophuhliso, i-BTF inelabhoratri ehambelana ne-electromagnetic, ilabhu yonxibelelwano engenazingcingo, ilebhu yeSAR, ilebhu yokhuseleko, ilebhu yokuthembeka, ilebhu yovavanyo lwebhetri, uvavanyo lwekhemikhali kunye nezinye iilabhoratri. Inonxibelelwano olugqibeleleyo lwe-electromagnetic, amaza onomathotholo, ukhuseleko lwemveliso, ukuthembeka kokusingqongileyo, uhlalutyo lokusilela kwezinto, i-ROHS/REACH kunye nobunye ubuchule bokuvavanya. ILebhu yoVavanyo lwe-BTF ixhotyiswe ngamaziko ovavanyo abuchwephesha kunye apheleleyo, iqela elinamava ovavanyo kunye neengcali zesatifikethi, kunye nokukwazi ukusombulula uvavanyo oluntsonkothileyo kunye neengxaki zesiqinisekiso. Sithobela imigaqo ekhokelayo "yobulungisa, ukungakhethi buso, ukuchaneka, kunye nokungqongqo" kwaye silandela ngokungqongqo iimfuno ze-ISO/IEC 17025 yovavanyo kunye nenkqubo yolawulo lwelebhu yokulinganisa kulawulo lwezenzululwazi. Sizimisele ukubonelela abathengi ngeyona nkonzo iphakamileyo. Ukuba unayo nayiphi na imibuzo, nceda uzive ukhululekile ukuqhagamshelana nathi nangaliphi na ixesha.