Cov khob dej yas yog cov khoom siv hauv peb lub neej txhua hnub. Nws yog ib qho tseem ceeb heev uas yuav tau xaiv cov ntaub ntawv zoo. Hauv qab no yog ib tsab xov xwm hais txog cov khoom siv kev nyab xeeb ntawm cov khob dej yas.
Raws li tib neeg tau them nyiaj ntau dua rau kev noj qab haus huv thiab kev tiv thaiv ib puag ncig, ntau thiab ntau cov neeg siv khoom tau saib xyuas cov khoom siv ntawm cov khob dej yas. Kev nyab xeeb yog ib qho tseem ceeb tshaj plaws thaum xaiv lub raj mis dej yas. Kab lus no yuav qhia txog ntau yam khoom siv khob dej yas thiab tsom rau cov teeb meem kev nyab xeeb.
Ua ntej ntawm tag nrho cov, polyethylene (PE) yog cov khoom siv khob dej yas. Nws muaj qhov zoo qis thiab kub ruaj khov thiab tsis tso cov khoom tsis zoo. Cov fwj dej polyethylene tuaj yeem siv los tuav cov dej kub lossis dej txias thiab muaj kev nyab xeeb thiab txhim khu kev qha. Tsis tas li ntawd, polyethylene yog cov yas rov ua dua tshiab thiab yog ib puag ncig zoo.
Thib ob, polypropylene (PP) kuj yog cov khoom siv khob dej yas. Zoo ib yam li polyethylene, polypropylene muaj thermal stability thiab tshuaj tsis kam. Yog li ntawd, polypropylene dej fwj kuj yog ib qho kev xaiv zoo. Ib yam li ntawd, polypropylene kuj yog cov yas rov ua dua tshiab thiab yog ib puag ncig zoo.
Txawm li cas los xij, qee cov ntaub ntawv yas yuav tsis haum raws li cov ntaub ntawv khob dej. Piv txwv li, polyvinyl chloride (PVC) yog ib hom yas, tab sis nws tuaj yeem tso cov khoom tsis zoo xws li plasticizers. Cov tshuaj no tej zaum yuav muaj teeb meem rau tib neeg noj qab haus huv. Yog li ntawd, thaum xaiv cov fwj dej yas, sim tsis txhob siv cov ntaub ntawv polyvinyl chloride.
Tsis tas li ntawd, polystyrene (PS) kuj yog cov khoom siv yas, tab sis nws yog rhiab rau qhov kub thiab txias. Polystyrene tuaj yeem tso cov khoom tsis zoo ntawm qhov kub thiab txias, ua rau nws tsis haum rau cov dej kub. Txawm hais tias cov fwj dej polystyrene pheej yig dua ntawm tus nqi, los ntawm kev pom kev nyab xeeb, peb pom zoo xaiv lwm cov ntaub ntawv.
Tsis tas li ntawd, muaj cov yas biodegradable hu ua melamine (PLA), uas kuj tau siv dav hauv kev ua khob dej yas hauv xyoo tas los no. PLA yog tsim los ntawm cov khoom siv txuas ntxiv dua tshiab xws li cov hmoov nplej pob kws thiab muaj kev nyab xeeb thiab tsis muaj mob rau tib neeg. Thaum siv, PLA khob dej yuav tsis tsim cov tshuaj phem lossis ua rau muaj kuab paug rau ib puag ncig. Yog li ntawd, PLA lub raj mis dej yog qhov kev xaiv zoo tshaj plaws thiab zoo ib puag ncig.
Thaum kawg, tsis hais cov khoom siv khob dej yas twg koj xaiv, peb pom zoo ua raws li cov hauv qab no kev siv thiab kev saib xyuas:
1. Tsis txhob muab lub raj mis tso rau hauv qhov kub thiab txias kom tsis txhob decomposition thiab dissolution ntawm cov ntaub ntawv yas.
2. Ntxuav lub raj mis yas tsis tu ncua kom tsis txhob muaj cov av seem thiab cov kab mob loj hlob.
3. Tsis txhob siv cov tshuaj detergents hnyav kom tsis txhob cuam tshuam kev nyab xeeb ntawm cov ntaub ntawv yas.
4. Yog hais tias lub khob dej puas lawm los yog muaj hnub nyoog, nws yuav tsum tau hloov nyob rau hauv lub sij hawm kom tsis txhob siv lub khob uas muaj teeb meem rau kev noj qab haus huv.
Txhawm rau ua kom tiav, polyethylene thiab polypropylene yog cov khoom siv hauv lub raj mis dej nyab xeeb, thaum polyvinyl chloride thiab polystyrene yuav tsum zam kom ntau li ntau tau. Tsis tas li ntawd, biodegradable yas PLA kuj yog ib qho kev xaiv zoo thiab ib puag ncig zoo. Thaum xaiv lub khob dej yas, thov xyuam xim rau kev nyab xeeb ntawm cov khoom siv thiab ua raws li kev siv thiab kev saib xyuas kom raug. Ua li no, koj tuaj yeem xaiv lub raj mis yas dej nyab xeeb thiab txhim khu kev qha thiab txaus siab rau lub neej noj qab haus huv.
Post lub sij hawm: Lub Xya hli ntuj-30-2024