Muaj ntau hom yas yas, xws li polyethylene, tseem hu ua PE, High-ntom polyethylene (LDPE), uas yog cov siv cov khoom siv uas siv rau cov hnab yas. Thaum cov hnab yas zoo tib yam no tsis ntxiv nrog cov tsis txaus ntseeg, nws siv ntau pua xyoo los ua kev qias, uas coj cov khoom muaj kuab paug rau lub ntiaj teb thiab ib puag ncig.
Tseem muaj qee lub hnab tsis ruaj khov, xws li phwv, oxidative kev ua tsis tau, thiab cov pa roj calcium ntxiv rau cov polyethylene. Tib neeg lub cev tseem phem dua.
Tseem muaj qee lub hnab hmoov starch fake, uas tus nqi me ntsis ntau dua li cov yas zoo tib yam, tab sis nws tseem hu ua "degradable". Hauv ntej, tsis muaj teeb meem dab tsi cov chaw tsim khoom ntxiv rau PE, nws tseem yog polyethylene. Ntawm chav kawm, raws li tus neeg siv khoom, koj yuav tsis tuaj yeem pom nws.
Ib txoj kev sib piv yooj yim heev yog qhov ntsuas tus nqi. Tus nqi ntawm cov hnab khib nyiab degradable cov hnab khib nyiab tsuas yog ib qho siab dua me dua li cov dog dig. Tus nqi ntawm cov hnab khib nyiab biodegradable xaim khib yog ob lossis peb zaug siab dua li ntawm cov dog dig. Yog tias koj ntsib hom "tsis ruaj khov lub hnab" nrog tus nqi qis heev, tsis txhob xav tias nws pheej yig tuaj tos, nws yuav yog lub hnab uas tsis ua tiav.
Xav txog nws, yog tias lub hnab ntim nrog tus nqi qis dua tuaj yeem txwv, vim li cas cov kws tshawb fawb tseem kawm cov hnab yas siab dua? Cov hnab khib nyiab ua ib feem loj ntawm cov hnab yas ntim, pov tseg cov ntaub ntawv yas thiab thiaj li hu ua lub hnab khib nyiab "tsis taus.
Nyob rau hauv cov ntsiab lus ntawm cov kev txwv cov yas, ntau cov lag luam siv cov lus me me uas tsis muaj kev tiv thaiv thiab muaj kev tiv thaiv "ib puag ncig" thiab "degradable"; Thiab cov neeg tau txais kev pab tsis tau tsis nkag siab, yooj yim nws ntseeg tau tias qhov ntawd tau hais tias "microplastic" yuav ua rau cov tsiaj khib nyiab uas ua rau cov tsiaj txhu thiab tib neeg.
Txhawm rau nrov rau nws, unensorable plastics tuaj yeem faib ua petrochemical-based detradable plastics raws li qhov chaw ntawm raw khoom.
Raws li cov kev cuam tshuam kev cuam tshuam, nws tuaj yeem muab faib ua cov photodegradation, thermo-oxidative tsis txheeb thiab biodegradation.
Photheregradable plastics: lub teeb pom kev zoo yuav tsum tau ua. Feem ntau, photodegradable plastics tsis tuaj yeem yog qhov chaw pov tseg kom zoo rau hauv lub chaw pov khoom khib nyiab lossis hauv ntuj chaw rau cov xwm txheej uas twb muaj lawm.
Thermo-oxidative plastics: plastics uas tawg hauv qab kev ua ntawm tshav kub lossis oxidation dhau ib lub sij hawm ua rau kev hloov pauv ntawm cov qauv tshuaj ntawm cov khoom. Vim yog cov xwm txheej uas twb muaj lawm, nws yog qhov nyuaj rau kev tsis txaus siab kiag li feem ntau.
Biodegradable plastics: plant-based such as starch straws or raw materials such as PLA + PBAT, biodegradable plastics can be composted with waste gas, such as kitchen waste, and can be degraded into water and carbon dioxide. Raws li kev plastics Bio kuj tseem tuaj yeem txo cov pa roj carbon dioxide. Piv nrog dastics zoo tib yam, bio-bioed plastics tuaj yeem txo cov peev txheej kev siv roj los ntawm 30% txog 50%.
Nkag siab qhov sib txawv ntawm qhov sib txawv ntawm kev cais kho thiab ua rau muaj kev cuam tshuam tag nrho, koj puas kam siv nyiaj nyob rau cov hnab khib nyiab txhua lub sijhawm?
Rau peb tus kheej, rau peb cov xeeb ntxwv, rau cov tsiaj hauv ntiaj teb, thiab rau qhov chaw nyob zoo, peb yuav tsum muaj lub zeem muag zoo.
Lub Sijhawm Post: Feb-14-2022