Muri Kanama, abahanga mu bya shimi batangaje ko bashobora gukora ibimaze igihe bisa nkibidashoboka: gusenya bimwe mu bihumanya bihoraho byangiza ibidukikije mu bihe byoroheje.Ibintu bya polifluoroalkyl (PFAS), bikunze kwitwa imiti iteka, birundanya mubidukikije ndetse numubiri wacu ku kigero giteye ubwoba.Kuramba kwabo, gushinga imizi muburyo bukomeye bwo kumeneka karuboni-fluor, bituma PFAS igira akamaro cyane nkimyenda itagira amazi nudukingirizo hamwe nifuro yo kuzimya umuriro, ariko bivuze ko imiti ikomeza ibinyejana byinshi.Bamwe mubagize iri tsinda rinini ryibintu bizwi ko ari uburozi.
Iri tsinda riyobowe n’umuhanga mu bya shimi muri kaminuza y’amajyaruguru y’iburengerazuba, William Dichtel n’umunyeshuri wahawe impamyabumenyi Brittany Trang, basanze intege nke muri acide ya karubasi ya karubasi ya perfluoroalkyl hamwe n’imiti ya GenX, iri mu kindi cyiciro cya PFAS.Gushyushya ibibyimba mumashanyarazi akuramo imiti ya acide karubike;kongeramo sodium hydroxide ikora imirimo isigaye, hasigara ion ya fluor na molekile kama nziza.Uku kumena umubano ukomeye C - F urashobora kugerwaho kuri 120 ° C gusa (Ubumenyi 2022, DOI: 10.1126 / siyanse.abm8868).Abahanga bizeye kugerageza uburyo bwo kurwanya ubundi bwoko bwa PFAS.
Jennifer Faust, umuhanga mu by'imiti muri kaminuza ya Wooster, avuga ko mbere y’iki gikorwa, ingamba nziza zo gukemura PFAS kwari ugukurikirana ibice cyangwa kubisenya ku bushyuhe bwo hejuru cyane ukoresheje ingufu nyinshi - bikaba bidashobora no kuba byiza rwose.Agira ati: “Niyo mpamvu iyi nzira y'ubushyuhe buke itanga icyizere.”
Ubu buryo bushya bwo gusenyuka bwakiriwe neza murwego rwibindi 2022 byagaragaye kuri PFAS.Muri Kanama, abashakashatsi bo muri kaminuza ya Stockholm bayobowe na Ian Cousins batangaje ko amazi y’imvura ku isi yose arimo aside ya perfluorooctanoic (PFOA) irenze urwego rw’inama rw’ikigo cy’Amerika gishinzwe kurengera ibidukikije kuri iyo miti mu mazi yo kunywa (Ibidukikije. Sci. Technol. 2022, DOI: 10.1021 /acs.est.2c02765).Ubushakashatsi bwerekanye urugero rwinshi rwa PFAS mumazi yimvura nayo.
Faust agira ati: “PFOA na PFOS [acide perfluorooctanesulfonic] imaze imyaka ibarirwa muri za mirongo idatanga umusaruro, bityo igiye kwerekana uburyo bakomeje.”Ati: “Sinatekerezaga ko hazabaho byinshi.”Avuga ko akazi ka Cousins, “mu by'ukuri ari agace ka barafu.”Faust yabonye ubwoko bushya bwa PFAS-butagenzurwa bisanzwe na EPA-mumazi yimvura yo muri Amerika yibanda cyane kurenza ibyo bikoresho byumurage (Ibidukikije. Sci.: Ingaruka zingaruka 2022, DOI: 10.1039 / d2em00349j).
Igihe cyo kohereza: Ukuboza-19-2022