Ib qho khoom siv degradable yog ib qho uas tsis zoo nyob rau hauv thermodynamic thiab kev tig tau lub sijhawm dhau ib lub sijhawm.Qhov kev cuam tshuam ntawm qhov kev puas tsuaj ntawm sab nraud, nws tuaj yeem faib ua: cov ntaub ntawv photodegradation, cov ntaub ntawv biodegradation, thiab lwm yam, lub ntsiab ntawm qhov muaj feem xyuam yog kub, molecular. lub cev nyhav, cov qauv khoom, thiab lwm yam.
kev faib tawm
Raws li exogenous yam ntawm degradation, nws muaj peev xwm raug faib ua:
1. Cov khoom siv thaij duab: tshem tawm los ntawm tshav ntuj;
2. Cov khoom siv biodegradable: degraded los ntawm kev ua pa lossis tshuaj lom neeg ntawm cov kab mob me me xws li hu ua fungi thiab kab mob, thiab thaum kawg decomposed rau hauv carbon dioxide thiab dej;
3. Cov khoom ua rau ib puag ncig: kev daws teeb meem hauv ib puag ncig ntuj ib puag ncig xws li lub teeb, cua sov, dej, cov pa phem ntawm cov kab mob, kab mob me me, kab thiab lub zog ua si.
