Muva nje, ucwaningo oluvela eNyuvesi yaseMcGill eCanada lubonise ukuthi izikhwama zetiye zikhulula amashumi ezigidigidi zezinhlayiya zepulasitiki emazingeni okushisa aphezulu. Kulinganiselwa ukuthi inkomishi ngayinye yetiye eyenziwa esikhwameni ngasinye setiye iqukethe ama-microplastic ayizigidi eziyizinkulungwane ezingu-11.6 kanye nezinhlayiya ze-nanoplastic eziyizigidi eziyizinkulungwane ezingu-3.1. Ucwaningo lwashicilelwa ku-American Journal of Environmental Science and Technology ngoSepthemba 25.
Bakhetha ngokungahleliwe izikhwama zetiye ezine zepulasitiki: izikhwama ezimbili zenayiloni nezikhwama ezimbili ze-PET. Ikakhulukazi, i-PET ingasetshenziswa ebangeni lokushisa elingu-55-60 ℃ isikhathi eside, futhi ingamelana nezinga lokushisa eliphakeme elingu-65 ℃ kanye nezinga lokushisa eliphansi elingu - 70 ℃ isikhathi esifushane, futhi inomthelela omncane ezintweni zayo zomshini amazinga okushisa aphezulu naphansi. Lahla itiye, geza isikhwama ngamanzi ahlanzekile, bese ulingisa inqubo yokwenza itiye, bese ucwilisa isikhwama esingenalutho ngamanzi ashisayo angama-95 ℃ imizuzu emi-5. Kusobala ukuthi amanzi esiwaphisa itiye angamanzi abilayo, futhi izinga lokushisa liphakeme kakhulu kunohlu olusetshenziswayo lwe-PET.
Ukuqaphela kukaMcGill kukhombisa ukuthi inqwaba yezinhlayiya zepulasitiki zizokhishwa kuqala. Inkomishi yesikhwama setiye ingakhulula cishe ama-microns ayizigidi eziyizinkulungwane ezingu-11.6 nama-nanometer ayizigidi eziyizinkulungwane ezingu-3.1 ezinhlayiya zepulasitiki! Ngaphezu kwalokho, kungakhathaliseki ukuthi lezi zinhlayiya zepulasitiki ezikhishwe zinobuthi ezinto eziphilayo. Ukuze baqonde ubuthi bezinto eziphilayo, abacwaningi basebenzisa amazeze amanzi, isilwane esingenamgogodla, okuyisilwane esiyisibonelo esisetshenziselwa ukuhlola ubuthi emvelweni. Lapho isikhwama setiye sigcwala kakhulu, kuyancipha ukubhukuda kwezeze zamanzi. Yiqiniso, insimbi enzima + ipulasitiki imbi kakhulu kunezinhlayiya zepulasitiki ezihlanzekile. Ekugcineni, izeze lamanzi alizange life, kodwa lalikhubazekile. Ucwaningo luphethe ngokuthi noma izinhlayiya zepulasitiki zesikhwama setiye zithinta impilo yomuntu zidinga ucwaningo olwengeziwe.
Isikhathi sokuthumela: Feb-14-2023