I-United States izosebenzisa izimfuneko ezengeziwe zesimemezelo sezinto ezingama-329 PFAS

Ngomhla zingama-27 kuMasingana, 2023, i-US Environmental Protection Agency (EPA) iphakamise ukuqaliswa koMthetho Obalulekile Wokusebenzisa Okusha (i-SNUR) wezinto ezingasebenzi ze-PFAS ezifakwe kuhlu ngaphansi koMthetho Wokulawulwa Kwezinto Ezinobuthi (i-TSCA).

Ngemva cishe konyaka wezingxoxo nezingxoxo, lesi sinyathelo sokulawula sagcina sisetshenziswe ngokusemthethweni ngoJanuwari 8, 2024!
1. Izinto ezingasebenzi
Izinto ezingasebenzi kuhla lwemibhalo lwe-TSCA zibhekisela kumakhemikhali angazange akhiqizwe, angeniswe ezweni, noma acutshungulwe e-United States kusukela ngomhlaka-21 Juni 2006.
Ngokuvamile, amakhemikhali anjalo awadingi ukuhlolwa okuphelele kwe-EPA nokuxazululwa kwengozi ukuze aqalise kabusha ukukhiqiza, ukungenisa, nokucubungula imisebenzi yokuhweba ngaphakathi kwe-United States.
Ngokwethulwa kwezinqubomgomo zakamuva zokulawula, inqubo yokuqalisa kabusha ukukhiqizwa kwezinto ezingasebenzi ze-PFAS ngaphakathi kwe-United States izoba nezinguquko.
2. Isendlalelo sezinyathelo ezethulwe
I-EPA ibheka ukuthi uma izinto ze-PFAS ezingasebenzi zivunyelwe ukuthi ziqalise kabusha ukukhiqiza neminye imisebenzi ngaphandle kokuhlolwa okuphelele nokuxazululwa kwengozi, nakanjani kuzodala ukulimala empilweni yomuntu kanye nemvelo.

Ngakho-ke, i-EPA inqume ukuthi izinto ezinjalo kufanele zenze Isimemezelo Esibalulekile Sokusetshenziswa Okusha (i-SNUN) ngaphambi kokuqalisa kabusha ukukhiqiza neminye imisebenzi. Isimemezelo sidinga ukuhambisa ulwazi ngokusetshenziswa kwabo, ukuchayeka, kanye nokukhululwa ngaphakathi kwe-United States ku-EPA ukuze kuhlaziywe, futhi sinqume ukuthi zizobeka yini izingozi ezingalawuleki empilweni yabantu nasendaweni ezungezile ngaphambi kokusetshenziswa.
3. Yiziphi izinto ezizobhekana nezinyathelo zokulawula
Le nqubomgomo yokulawula ibandakanya izinto ezingasebenzi ze-PFAS ezingama-329.
Izinto ezingama-299 zifakwe ohlwini, futhi izinkampani zingaziqinisekisa ngolwazi olufana nezinombolo ze-CAS. Kodwa kusekhona izinto ezingama-30 ezingafakwanga ngokucacile ohlwini ngenxa yokuzibandakanya kwazo ezinhlelweni ze-CBI. Uma impahla yebhizinisi ihlangabezana nezincazelo ezilandelayo zesakhiwo se-PFAS, kuyadingeka ukuthi ulethe isiqinisekiso sokuhlola okusha ku-EPA:
R - (CF2) - CF (R ') R', lapho kokubili i-CF2 ne-CF kuyikhabhoni egcwele;
R-CF2OCF2-R ', lapho u-R no-R' kungaba ngu-F, O, noma ikhabhoni egcwele;
I-CF3C (CF3) R'R '', lapho u-R 'no-R' 'kungaba ngu-F noma i-saturated carbon.
I-BTF Testing Lab iyisikhungo sokuhlola esigunyazwe yi-China National Accreditation Service for Conformity Assessment (CNAS), inombolo: L17568. Ngemva kweminyaka yokuthuthuka, i-BTF inelabhorethri ehambelana nozibuthe kagesi, ilabhorethri yokuxhumana engenantambo, ilabhorethri ye-SAR, ilabhorethri yokuphepha, ilabhorethri yokwethembeka, ilabhorethri yokuhlola ibhethri, ilabhorethri yokuhlola amakhemikhali nezinye izindawo zokucwaninga. Inokuhambisana okuphelele kwe-electromagnetic, imvamisa yomsakazo, ukuphepha komkhiqizo, ukuthembeka kwemvelo, ukuhlaziya ukwehluleka kwezinto ezibonakalayo, i-ROHS/REACH namanye amakhono okuhlola. Ilebhu yokuhlola ye-BTF ifakwe izinsiza zokuhlola ezichwepheshile neziphelele, ithimba elinolwazi lokuhlola nochwepheshe bokunikeza izitifiketi, kanye nekhono lokuxazulula izinkinga ezihlukahlukene zokuhlola nezitifiketi. Sithobela izimiso eziqondisayo "zokulunga, ukungakhethi, ukunemba, kanye nokuqina" futhi silandela ngokuqinile izimfuneko ze-ISO/IEC 17025 yokuhlola kanye nohlelo lokuphatha ilabhorethri yokulinganisa yokuphathwa kwesayensi. Sizibophezele ekunikezeni amakhasimende isevisi yekhwalithi ephezulu kakhulu. Uma unemibuzo, sicela ukhululeke ukuxhumana nathi nganoma yisiphi isikhathi.