Cov kws tshawb fawb Askiv tau tsim cov ceramic hollow fiber ntau ua ke nrog photocatalytic oxidation los kho cov roj txiv ntoo cov dej khib nyiab. Kev lag luam roj xibtes yog ib qho tseem ceeb ntawm kev ua liaj ua teb thoob ntiaj teb, tab sis cov roj txiv ntoo cog cov dej khib nyiab (POME) tsim thaum lub sijhawm tsim khoom muaj cov organic hnyav thiab cov xim sib sib zog nqus, ua rau cov tshuaj lom neeg thiab physicochemical kev kho tsis txaus kom ua tau raws li cov qauv. Kev tso tawm ncaj qha yuav ua rau eutrophication thiab ecological puas tsuaj. Cov kws tshawb fawb tau tsim TiO₂-embedded ob- txheej mullite ceramic hollow fiber ntau los daws cov teeb meem ntawm POME sib sib zog nqus kev kho mob thiab membrane fouling.
I. Kev sim tsim thiab kev npaj
1.Materials thiab Structure: Lub puab txheej yog ntshiab mullite, muab cov neeg kho tshuab kev txhawb nqa thiab ib tug pom substrate; txheej txheej yog mullite + 1~4 wt% TiO₂, imparting photocatalytic kev ua.
2.Kev Npaj: Ib theem hloov pauv + co-sintering txoj kev yog siv. Sintering ntawm 1350℃tshem tawm qhov teeb meem ob - txheej delamination, thiab cov qauv hollow fiber yog npaj los ntawm co-extrusion molding.
3.Membrane Cov ntaub ntawv: tiav daim nyias nyias thickness (tom qab sintering): Ib leeg - txheej membrane (SL): 900 μm, Bilayer membrane: 1090-1310 μm; Membrane ntev siv rau kev sim: 10 cm rau kev kuaj photocatalysis, 7 cm rau flux / retention cutoff test.
II. Cov txiaj ntsig tshawb fawb
1.Structure thiab Performance Correlation: Lub bilayer membrane nthuav tawm kev sib khi nruj yam tsis muaj delamination, thiab TiO₂ tau ua tiav tiav, nrog cov ntsiab lus Ti nce mus rau 3.76% nrog nce ntxiv . 3 wt% TiO₂ (DL3) qhia qhov siab tshaj plaws flexural zog (16.34 MPa) thiab qhov zoo tshaj plaws mechanical stability; 4 wt% TiO₂ (DL4) muaj qhov tsawg tshaj plaws pore loj (28.25 nm), koom nrog rau qib ultrafiltration. TiO₂ loading txo qhov porosity thiab dej ntshiab flux tab sis ho txhim kho antifouling thiab flux stability.
2.Separation thiab Photocatalytic Effects: Lub bilayer membrane yog qhov zoo tshaj plaws rau ib qho - txheej membrane, nrog DL₃ tuav tus nqi ntawm 54.50%, piv rau tsuas yog 11.27% -19.32% rau tib - txheej membrane.
- Kev tshem tawm cov pa phem: DL4 ua tau zoo tshaj plaws nyob rau hauv UV teeb, ua tiav COD tshem tawm tus nqi ntawm 44.92% thiab cov xim tshem tawm ntawm 52.40%, nrog flux ntawm 18.90 L / (m²・h・bar).
- Stability thiab Antifouling: DL3 thiab DL4 tau pom tias muaj qhov nce siab dua qhov rov qab los (FRR) thiab kev ruaj ntseg Performance index (SI), tseem nyob ruaj khov txawm tias tom qab peb lub voj voog, ua rau nws tus kheej zoo heev - ntxuav kev ua haujlwm.
- Ib leeg- txheej membranes raug kev txom nyem los ntawm fouling hnyav thiab poob qis hauv flux, thaum ob npaug - txheej membranes ho txo cov membrane fouling vim TiO₂ photocatalytic degradation ntawm cov pa phem.
III. Qhov zoo, qhov tsis zoo, thiab kev cia siab rau yav tom ntej
Txoj Kev Zoo Tshaj Plaws
- Cov txheej txheem ob - txheej txheem sib npaug ntawm cov neeg kho tshuab lub zog, pom kev ua haujlwm, thiab kev ua haujlwm photocatalytic, daws qhov teeb meem ntawm TiO₂ sib cais thiab rov qab.
- Ceramic membranes tiv taus cov kua qaub, alkalis, thiab kub kub, ua rau lawv tsim nyog rau kev siv dej khib nyiab ntau dua li cov ntaub ntawv polymer.
- Tus kheej- cov khoom siv tu tus kheej txo cov zaus ntxuav.
Cov lus qhia yav tom ntej
- Optimize TiO₂ loading, sintering kub, thiab membrane pore loj los txhim kho degradation efficiency.
- Doping nrog N thiab Zr broadens lub photoresponse ntau yam, ua kom pom lub teeb photocatalysis.
- Cov txheej txheem tsim khoom tau nce ntxiv, thiab kev sim- nplai thiab ntev- ua pov thawj kev ua haujlwm tau ua tiav.
IV. Cov ntsiab lus
A TiO₂-embedded bilayer mullite ceramic hollow fiber membrane tau ua tiav tiav rau kev kho cov txiv ntoo cog cov dej khib nyiab, ua kom muaj txiaj ntsig zoo ntawm kev sib cais thiab cov photocatalytic degradation. Nws nthuav tawm cov txiaj ntsig tseem ceeb hauv kev tiv thaiv - fouling, stability, thiab tus kheej - ntxuav. Cov thev naus laus zis no muab cov kev daws teeb meem ruaj khov rau kev kho qhov tob ntawm cov roj xibtes cov dej khib nyiab thiab muab cov ntaub ntawv tseem ceeb rau kev tsim thiab siv cov ceramics -raws li photocatalytic membranes.
