Iminyaka eminingi, indlela eyinhloko yokugaywa kabusha kwamapulasitiki ukugaywa kabusha kwemishini, okuvame ukuncibilikisa izingcezu zepulasitiki bese zizenza izinhlayiya zemikhiqizo emisha.Nakuba lezi zinto zisengama-polymer epulasitiki afanayo, izikhathi zazo zokugaywa kabusha zilinganiselwe, futhi le ndlela incike kakhulu emafutheni ezinto ezimbiwa phansi.
Njengamanje, amapulasitiki emfucuza e-China ikakhulukazi afaka ifilimu yepulasitiki, izintambo zepulasitiki nezimpahla ezilukiweyo, amapulasitiki anegwebu, amabhokisi okufaka epulasitiki neziqukathi, imikhiqizo yepulasitiki esetshenziswa nsuku zonke (amabhodlela epulasitiki, ukufakwa kwamapayipi,iziqukathi zokudla, njll.), izikhwama zepulasitiki namafilimu epulasitiki ezolimo.Ngaphezu kwalokho, ukusetshenziswa konyakaamapulasitiki ezimotoe-China isifinyelele amathani angu-400000, kanye nokusetshenziswa konyaka kwamapulasitikiizinto zikagesifuthi impahla yasendlini isifinyelele amathani angaphezu kwesigidi esi-1.Le mikhiqizo isibe ngomunye wemithombo ebalulekile yokulahlwa kwepulasitiki ngemuva kokulahlwa.
Kulezi zinsuku, ukunakwa okwengeziwe kunikezwa ekululameni kwamakhemikhali.Ukugaywa kabusha kwamakhemikhali kungaguqula amapulasitiki abe izinto zokubasa, izinto ezingavuthiwe zemikhiqizo ye-petrochemical ngisho nama-monomers.Akukwazi nje ukuvuselela amapulasitiki amaningi alahlwayo, kodwa futhi kunciphise ukuncika kumafutha ezinto ezimbiwa phansi.Nakuba kuvikela imvelo futhi kuxazulula inkinga yokungcoliswa kwepulasitiki, kunganciphisa nokukhishwa kwekhabhoni.
Kubuchwepheshe obuningi bokubuyisela amakhemikhali epulasitiki, ubuchwepheshe be-pyrolysis buhlale bunesikhundla esiphambili.Ezinyangeni ezisanda kwedlula, izikhungo zokukhiqiza uwoyela we-pyrolysis eYurophu naseMelika ziye zanda nhlangothi zombili ze-Atlantic.Amaphrojekthi amasha ahlobene nobuchwepheshe bokutholwa kwe-resin yokwenziwa nawo ayathuthuka, okune kuwo amaphrojekthi e-polyethylene terephthalate (PET), wonke atholakala eFrance.
Uma kuqhathaniswa nokululama ngomshini, enye yezinzuzo ezibalulekile zokutholwa kwamakhemikhali ukuthi ingathola ikhwalithi ye-polymer yasekuqaleni kanye nezinga eliphakeme lokutholwa kwepulasitiki.Nokho, nakuba ukuvuselelwa kwamakhemikhali kungasiza umnotho wepulasitiki ogaywa kabusha, indlela ngayinye ineziphambeko zayo uma izosetshenziswa ngezinga elikhulu.
Imfucumfucu yepulasitiki ayiyona nje inkinga yokungcoliswa komhlaba wonke, kodwa futhi iyimpahla eluhlaza enokuqukethwe kwekhabhoni ephezulu, izindleko eziphansi futhi ingatholakala emhlabeni wonke.Umnotho oyindilinga nawo usuphenduke inkomba yentuthuko yesikhathi esizayo yemboni yepulasitiki.Ngokukhuthazwa kobuchwepheshe be-catalytic, ukubuyiswa kwamakhemikhali kubonisa ithemba elihle lezomnotho.
Isikhathi sokuthumela: Aug-16-2022