I-PTFE vs Perfluorooctanoic Acid (PFOA)

I-Perfluorooctanoic acid (PFOA) (i-conjugate base perfluorooctanoate), eyaziwa nangokuthi i-C8, iyi-synthetic perfluorinated carboxylic acid kanye ne-fluorosurfactant.Uhlelo olulodwa lwezimboni lufana ne-surfactant ku-emulsion polymerization yama-fluoropolymers.Isetshenziswe ekwenziweni kwezimpahla eziqavile zabathengi njenge-polytetrafluoroethylene (eyaziwa nge-polymer).I-PFOA yenziwe kusukela ngawo-1940 ngamanani ezimboni.Kubuye kwakhiwe ukucekelwa phansi kwezinto ezandulelayo njengamanye ama-fluorotelomers.

I-PTFE ibisetshenziswa kwezohwebo kusukela ngeminyaka yawo-1940s.Inokusetshenziswa okunhlobonhlobo ngenxa yokuthi izinze ngokwedlulele (ayisabeli namanye amakhemikhali) futhi inganikeza indawo ecishe ingabi nakhuni.Abantu abaningi bajwayelene nayo njengendawo yokwemboza engagxili yamapani nezinye izinto zokupheka.Ibuye isetshenziswe kweminye imikhiqizo eminingi, njengezivikeli zendwangu.

I-Perfluorooctanoic acid (PFOA), eyaziwa nangokuthi i-C8, ingelinye lamakhemikhali enziwe umuntu.Isetshenziselwa inqubo yokwenza i-polymer namakhemikhali afanayo (aziwa ngokuthi ama-fluorotelomers), nakuba ishiswa ngesikhathi senqubo futhi ingekho ngamanani abalulekile emikhiqizweni yokugcina.

I-PFOA inamandla okuba yinkinga yezempilo ngoba ingahlala emvelweni nasemzimbeni womuntu isikhathi eside.Ucwaningo luthole ukuthi lukhona emhlabeni wonke emazingeni aphansi kakhulu cishe egazini lawo wonke umuntu.Amazinga aphezulu egazi atholwe kubahlali bomphakathi lapho amanzi asendaweni angcoliswe yi-PFOA.Abantu abachayeke ku-PFOA emsebenzini bangaba namazinga aphezulu ngokuphindwe kaningi.

I-PFOA nezinye izinhlanganisela ezifanayo zingatholakala emazingeni aphansi kokunye ukudla, emanzini okuphuza, nasothulini lwasendlini.Nakuba amazinga e-PFOA emanzini okuphuza ngokuvamile ephansi, angaba phezulu ezindaweni ezithile, njengezitshalo zamakhemikhali eziseduze ezisebenzisa i-PFOA.

Abantu bangaphinde bavezwe ku-PFOA kusuka ku-ski wax noma ezindwangu kanye nokhaphethi oye waphathwa njengokumelana namabala.I-cookware engagxili ayiwona umthombo obalulekile wokuchayeka kwe-PFOA.

Ucwaningo oluningi eminyakeni yamuva lubheke ukuthi kungenzeka yini ukuthi i-PFOA ibangele umdlavuza.Abacwaningi basebenzisa izinhlobo ezi-2 eziyinhloko zezifundo ukuzama ukuthola ukuthi into enjalo ingabanga umdlavuza.

Izifundo elebhu

Ocwaningweni olwenziwe elebhu, izilwane zichayeka entweni (ngokuvamile ngemithamo emikhulu kakhulu) ukubona ukuthi ingabe idala izimila noma ezinye izinkinga zempilo.Abacwaningi bangase futhi baveze amangqamuzana omuntu esitsheni selebhu entweni ukuze babone ukuthi azidala yini izinhlobo zezinguquko ezibonakala kumaseli omdlavuza.

Ucwaningo ezilwaneni zaselabhu zithole ukuchayeka ku-PFOA kukhulisa ubungozi bezimila ezithile zesibindi, amasende, izindlala zebele (amabele), namanyikwe kulezi zilwane.Ngokuvamile, izifundo eziqhutshwa kahle ezilwaneni zenza umsebenzi omuhle wokubikezela ukuthi yikuphi ukuchayeka okubangela umdlavuza kubantu.Kodwa akucaci ukuthi indlela leli khemikhali elithinta ngayo ingozi yomdlavuza ezilwaneni izofana yini nakubantu.

Izifundo kubantu

Ezinye izinhlobo zezifundo zibheka amazinga omdlavuza emaqenjini ahlukene abantu.Lezi zifundo zingase ziqhathanise izinga lomdlavuza eqenjini elichayeke entweni nezinga lomdlavuza eqenjini elingavezwanga kulo, noma liqhathanise nezinga lomdlavuza esibalweni sonke.Kodwa ngezinye izikhathi kungase kube nzima ukwazi ukuthi isho ukuthini imiphumela yalezi zinhlobo zocwaningo, ngoba ezinye izici eziningi zingase zibe nomthelela emiphumeleni.

Ucwaningo luye lwabheka abantu abavezwe ku-PFOA ngokuhlala eduze noma ukusebenza ezitshalweni zamakhemikhali.Ezinye zalezi zifundo ziye zaphakamisa ingozi eyengeziwe yomdlavuza wamasende ngokuchayeka kwe-PFOA eyengeziwe.Ucwaningo luye lwaphakamisa izixhumanisi ezingase zibe nomdlavuza wezinso nomdlavuza wegilo, kodwa ukwanda kwengozi kube kuncane futhi kungenzeka kube ngenxa yenhlanhla.

Olunye ucwaningo luye lwaphakamisa izixhumanisi ezingase zibe neminye imidlavuza, okuhlanganisa i-prostate, isinye, nomdlavuza wesibeletho.Kodwa akuzona zonke izifundo ezithole izixhumanisi ezinjalo, futhi ucwaningo olwengeziwe luyadingeka ukuze kucaciswe lokhu okutholakele.