Qhov sib txawv tseem ceeb ntawm kev pom thiab kev ua kom huv yog qhov pom yog cov txheej txheem uas cais cov khib nyiab los ntawm cov kua dej los ntawm kev lim tawm cov kua los ntawm qhov thaiv qhov kev ua kom huv yog txheej txheem ntawm kev sib cais cov khoom tsis xav tau los ntawm cov kua dej los ntawm kev sib txawv xws li kev pom thiab tshuaj tua kab mob.
Kev lim dej yog cov txheej txheem ua kom huv uas peb siv cov txheej txheem los ntawm cov kua dej tuaj yeem lim tawm. Qhov no tshem tawm cov khoom siv hauv cov kua dej. Kev huv huv yog ib lo lus dav dav uas peb tuaj yeem sib tham txog ntau txoj hauv kev uas tsis yog kev lim dej uas muaj txiaj ntsig zoo hauv kev ua kom huv ib tus qauv.
Dab tsi yog Lim?
Kev lim dej yog cov txheej txheem ntawm kev tshem cov khib nyiab hauv cov kua los ntawm kev hla cov kua dej los ntawm qhov thaiv uas tuaj yeem tuav cov khoom sib txuas. Cov txheej txheem no tuaj yeem ua haujlwm rau lub cev, kho tshuab lossis lom. Cov kua yuav yog kua lossis roj. Cov kua dej uas peb tau txais tom qab pom yog "filtrate". Qhov teeb meem uas peb siv rau kev pom yog "filter". Nws tuaj yeem yog qhov lim dej los yog qhov tob lim, ob txoj kev, nws ntxiab cov khoom.
Daim duab 01: Nqus Lim
Feem ntau, kev lim dej yog cov txheej txheem tsis zoo ntawm kev huv. Qhov no yog vim qee cov khoom siv tuaj yeem hla lub lim thaum qee cov kua dej yuav nyob twj ywm ntawm lub lim yam tsis tau mus rau qhov lim. Muaj ntau hom kev pom xws li kub pom, txias pom, nqus pom, ultrafiltration, thiab lwm yam. Ntxiv mus, cov kev siv ntawm cov txheej txheem no suav nrog cov hauv qab no;
- Yuav cais cov khoom thiab cov kua dej hauv kev ncua
- kas fes lim: cais kas fes hauv av
- Siv lim kom cais cov hlau muaj txiaj ntsig thaum lub sijhawm mining
- Yuav cais cov muaju los ntawm cov tshuaj thaum lub sij hawm recrystallization txheej txheem hauv organic chemistry
- Lub tshuab hluav taws xob siv qhov pom los tiv thaiv lub tshuab hluav taws xob los ntawm fouling nrog particulates
Kev Purification yog dab tsi?
Kev huv yog cov txheej txheem ntawm kev tshem tawm cov khoom tsis xav tau los ntawm cov qauv txhawm rau txhawm rau cais cov khoom xav tau. Peb siv cov txheej txheem sib txawv raws li kev ua kom huv huv rau kev tshem tawm cov khoom txawv teb chaws thiab cov khoom paug. Thaum kawg, peb tau txais "kev cais tawm" los ntawm kev ua kom huv ib tus qauv.
Daim duab 02: Affinity Chromatography raws li kev ua kom huv huv
Nyob rau hauv cov tshuaj lom neeg, cov txheej txheem purification feem ntau yog crystallization, sublimation, distillation, chromatography, thiab lwm yam. Feem ntau chemistry, peb siv cov txuj ci sib txawv xws li affinity purification, filtration, centrifugation, evaporation, smelting, refining, distillation, adsorption, thiab lwm yam raws li kev sib cais.
Dab tsi yog qhov sib txawv ntawm kev lim thiab lim dej?
Kev lim dej yog cov txheej txheem ntawm kev tshem tawm cov khib nyiab hauv cov kua los ntawm kev hla cov kua dej los ntawm qhov thaiv uas tuaj yeem tuav cov khoom uas muaj qhov ua kom huv si yog cov txheej txheem ntawm kev tshem tawm cov khoom tsis xav tau los ntawm cov qauv txhawm rau txhawm rau cais cov khoom xav tau. Yog li ntawd, filtration yog ib hom kev ua kom huv huv uas peb tuaj yeem siv los cais cov khoom ntawm cov kua (ntaub los yog kua). Qhov pom muab "filtrate" thaum kawg ntawm tus txheej txheem whereas purification muab ib qho "cais". Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm kev pom thiab kev ua kom huv.
Cov hauv qab no infographic nthuav tawm qhov sib txawv ntawm kev pom thiab kev ua kom huv hauv daim ntawv teev npe rau kev siv ceev.
Summary – Lim vs Purification
Kev pom yog ib hom kev ua kom huv huv uas peb siv los cais cov khoom sib txawv hauv cov qauv. Qhov sib txawv tseem ceeb ntawm kev pom thiab kev ua kom huv yog qhov pom yog ib qho txheej txheem uas cais cov khib nyiab los ntawm cov kua dej los ntawm kev lim tawm cov kua los ntawm kev thaiv qhov thaiv qhov purification yog txheej txheem ntawm kev sib cais cov khoom tsis xav tau los ntawm cov kua dej los ntawm kev sib txawv xws li pom thiab tshuaj tua kab mob.
