Kubantu abaningi, isiqalo esihle siyingxenye yempi. Umsebenzi wasekuseni uqala ngemva kwenkomishi yekhofi elishisayo...Ngalesi sikhathi, i-caffeine ibophezela ku-receptor ethile ebuchosheni, okwenza ubuchopho bungakwazi ukuthola izimpawu "zokukhathala", ngakho-ke kunikeza abantu amandla okuthuthukisa umphumela.
Kodwa-ke, ucwaningo olusha lukhiphe isexwayiso: ukusetshenziswa kwesikhathi eside kwezinkomishi zephepha ezilahlwayo ukuphuza ikhofi elishisayo noma iziphuzo ezishisayo, okuhlanganisa ukudla (okushisayo) emabhokisini okudla kwasemini alahlwayo, kuzokhokha inani lezempilo.
Ocwaningweni olusha olushicilelwe ku-《 Journal of Hazardous Materials》 (IF=9.038), ithimba labacwaningi abavela ku-Indian Institute of Technology lithole ukuthi ikhofi elishisayo noma ezinye iziphuzo ezishisayo ezinkomishini zephepha ezilahlwayo phakathi nemizuzu engu-15 Amashumi ezinkulungwane zezinto ezingaba yingozi zikhishelwa esiphuzweni, okuyizinhlayiya zepulasitiki...
Sonke siyawazi amaplastiki amancane. Eminyakeni yamuva nje, ngokukhiqizwa okuningi nokusetshenziswa kwamapulasitiki, ukugxila kwamapulasitiki amancane emvelweni kuye kwaqhubeka kwanda. Ukungcoliswa kwepulasitiki encane sekuyinkinga yemvelo yomhlaba wonke kanye nokuncipha kwe-ozone, i-acidification yolwandle, kanye nokushintsha kwesimo sezulu.
Abacwaningi bathi lawa mapulasitiki amancane acishe angabonakali aba usongo olukhulu empilweni yabantu. Ngasekuqaleni konyaka, ithimba labacwaningi baseMelika lithole okokuqala ngqa amapulasitiki amancane ezithweni zomuntu. Abantu bakhathazekile ngokuthi lokhu kungcola kuzodala umdlavuza noma inzalo. Ucwaningo luye lwabonisa ukuthi ukungcola kwepulasitiki encane kungabangela ukuvuvukala ezilwaneni.
Umbhali ohambisana nalolu cwaningo, uDkt. Sudha Goel, iSikole seSayensi yezeMvelo nobunjiniyela, i-Indian Institute of Technology, uthe: "Inkomishi yephepha egcwele ikhofi elishisayo noma itiye elishisayo izokwehlisa ungqimba lwe-microplastic enkomishini kungakapheli imizuzu eyi-15. izokwehlisa usayizi wama-micrometer angu-25 000. Lezi zinhlayiya zikhishwa zibe iziphuzo ezishisayo. Umuntu ovamile ophuza izinkomishi ezintathu zetiye noma ikhofi enkomishini yephepha elilahlwayo nsuku zonke uzongenisa izinhlayiya zepulasitiki ezingu-75 000 ezingabonakali ngeso lenyama."
Kulinganiselwa ukuthi ngonyaka odlule, abakhiqizi bezinkomishi zephepha bakhiqize izinkomishi zephepha ezingaba yizigidi eziyizinkulungwane ezingu-264, eziningi zazo ezisetshenziselwa itiye, ikhofi, ushokoledi oshisayo, ngisho nesobho. Le nombolo ilingana nezinkomishi zephepha ezingama-35 ngomuntu ngamunye emhlabeni.
Ukwenyuka okuqhubekayo kwenani lezinsiza zokuthutha emhlabeni nakho kuqhubekisele phambili isidingo semikhiqizo elahlekayo. Empilweni nasemisebenzini ematasatasa, uku-oda ukulethwa kokudla sekuyinto evamile kubantu abaningi. Amabhokisi esidlo sasemini alahlwayo alahlwa ngokushesha ngemva kokuba esephelile, futhi ngokuvamile awanawo umthelela omubi endaweni ezungezile njengeziqukathi zepulasitiki neze-styrofoam. Noma kunjalo, uSudha uthe, lokhu lula kuza ngentengo.
Abacwaningi banezela: “Amapulasitiki amancane asebenza njengabathwali bokungcola, njengama-ion, izinsimbi ezinobuthi ezinobuthi njenge-palladium, i-chromium ne-cadmium, nezinhlanganisela eziphilayo ezinama-hydrophobic futhi ezingangena embusweni wezilwane. Uma zidliwe isikhathi eside, i imiphumela yezempilo ingase ithinteke. Ibi kakhulu."
Indlela ebucayi yokuhlukanisa amakhemikhali ikhombe amapulasitiki amancane emanzini ashisayo. Okuphazamisa kakhulu, ukuhlaziya ifilimu yepulasitiki kwembula ukuba khona kwezinsimbi ezisindayo olwelweni.
Uyabona ukuthi imiphumela yokuhlola engenhla "iyashaqisa", ngakho-ke ingabe ukhona umkhiqizo ongangena esikhundleni sezinkomishi zephepha ezihlanganiswe nge-PE?
Impendulo ithi yebo !OkwethuIzinkomishi zephepha ze-EPP,Ibhokisi lesidlo sasemini le-OPB uchungechunge, njll., luphumelele ngokuphelele ukuhlolwa nesitifiketi seziphathimandla ezigunyaziwe ezihlukene (ukuhlolwa kokuphepha kobuthi bebhayoloji, ukuhlolwa kwe-POPs fluorine, ukuhlolwa okukhethekile kokufuduka, njll.), futhi ungaqiniseka ukuthi i-pulp egaywe kabusha noma iphepha lingagaywa kabusha. Beka kuqala ukwenza umquba, qaphela ukugaywa kabusha kwezinsiza futhi usebenzise ipulasitiki ephephile nenobungani nemvelo. Izinkomishi zephepha ezikhiqizwe ngalo zingashintsha ngokuphelele izinkomishi zephepha eziboshwe nge-PE.
Isikhathi sokuthumela: Jul-30-2021