Kev siv titanium electrode electrochemical technology hauv kev kho dej khib nyiab
Nrog rau txoj kev loj hlob ntawm ib puag ncig kev tshawb fawb thiab thev naus laus zis, kev siv tshuab ua kom muaj kuab paug thiab kev lag luam muaj txiaj ntsig tau maj mam ua tib zoo saib thiab siv. Electrochemical thev naus laus zis los kho cov pa phem ib puag ncig yog ib qho kev tsim tshiab ib puag ncig kev ua qias tuaj. Electrochemical technology muaj qhov zoo ntawm kev ua haujlwm qis. , kev ua haujlwm siab, tsis muaj kev ua qias tuaj nruab nrab, cov cuab yeej siv yooj yim, ob qho tib si huab cua flotation, flocculation, sterilization, tshwj xeeb tshaj yog rau kev tshem tawm cov kab mob biodegradable nyuaj, yog tam sim no muaj kev tshawb fawb ntau dua hauv tsev thiab txawv teb chaws.
1. Electrochemical kev kho cov pa phem: cov txheej txheem electrochemical yog siv hauv cov dej phwj tuaj, cov pa khib nyiab thiab cov hlau hnyav ions thiab lwm cov pa phem.
Daim ntawv thov kev kho mob tuaj yeem muab faib ua oxidation ncaj qha, tsis ncaj oxidation, photoelectrochemical.
Oxidation, electroreduction, thiab electroflotation / electroflocculation, thiab lwm yam.
1.1 Electrochemical oxidation: electrochemical oxidation muab faib ua electrooxidation ncaj qha thiab tsis ncaj electrooxidation, ncaj qha electrochemical oxidation
Tshuaj yog los hloov cov kuab paug organic thiab qee cov kuab paug inorganic rau hauv cov khoom tsis muaj teeb meem los ntawm titanium anodization. Hauv kev kho cov pa phem biorefractory xws li phenol, fluorine-muaj cov organic dyes, cyanide thiab lwm yam kuab paug, anodic oxidation ncaj qha tuaj yeem ua lub luag haujlwm degradation zoo. Indirect anodic oxidation yog los tsim cov khoom nruab nrab nrog cov nyhuv oxidizing muaj zog los ntawm cov tshuaj tiv thaiv anodic lossis oxidize cov tshuaj tua kab mob los ntawm cov tshuaj tiv thaiv nruab nrab uas tsis yog cov tshuaj tiv thaiv anodic, thiab thaum kawg ua tiav lub hom phiaj ntawm oxidative degradation ntawm cov pa phem. Piv txwv li, cov khoom siv nrog luv luv lifespan thiab muaj zog oxidizing muaj peev xwm raug tsim los ntawm anode. Cov kev tshawb fawb tau pom tias cov khoom siv luv luv xws li e-1 (solvated electrons), HO, HO2, O2: thiab lwm yam dawb radicals, uas tuaj yeem decompose cov pa phem. . Kev tshem tawm redox ntawm cov kuab paug organic yog ua los ntawm kev tsim cov redox khub hauv kev daws teeb meem, xws li electrolysis ntawm sodium chloride tov los tsim CIO-.
Siv cov qauv ntawm kev txo qis rau H2O2 ntawm cathode, tom qab ntawd tsim HO, thiab tom qab ntawd oxidizing organic teeb meem, nws tuaj yeem siv los kho phenol, benzene derivatives (anilines), HCHO thiab CN-. Txhawm rau txhawm rau txhawm rau tsim cov HO, cov hlau anode tuaj yeem siv los tsim Fe2 ntxiv, thiab Fenton cov tshuaj tiv thaiv tshwm sim:
Fe2 plus H2O2- → OH- plus HO. Fe 3 plus
HO ua los ntawm cov tshuaj tiv thaiv muaj zog oxidation nyhuv ntawm cov organic teeb meem, thiab Fe3 ntxiv yog hydrolyzed los tsim flocculent hydrogen thiab oxygen.
Hlau oxide tsim flocculation.
1.2 Electrochemical txo: Electrochemical txo yog kev tshem tawm ib puag ncig cov pa phem los ntawm cathodic txo, uas tuaj yeem muab faib ua
Rau cathodic direct txo thiab cathodic indirect txo. Cathodic txo tuaj yeem kho ntau yam kab mob xws li hlau ions
Cov tshuaj, cov organic uas muaj oxygen, sulfur dioxide gas, thiab lwm yam. Qhov ncaj qha electrochemical txo cov organic tebchaw tuaj yeem hloov ntau yam chlorine-muaj cov organic tebchaw rau hauv cov tshuaj tsis muaj tshuaj lom, thaum tseem txhim kho biodegradability ntawm cov khoom xws li:
R-CI + H + 2e -1 → RH + CI-
Kev txo qis cathodic feem ntau yog hais txog kev siv cov txheej txheem electrochemical los tsim qee cov xov xwm redox, xws li .
Ti3 ntxiv, V2 ntxiv thiab Cr2 ntxiv tshem tawm cov pa phem los ntawm kev txo qis, xws li kev txo qis electrochemical ntawm sulfur dioxide, uas tuaj yeem hloov mus rau hauv cov tshuaj sulfur:
SO2 ntxiv 4Cr2 ntxiv rau 4H ntxiv - → S ntxiv 4Cr3 ntxiv rau 2H20
Cr3 plus e-1- → Cr2 plus
Nyob rau tib lub sijhawm, kev txo qis cathodic feem ntau yog ib txoj hauv kev kom rov qab tau cov khoom muaj txiaj ntsig. Piv txwv li, qhov rov qab ntawm cov hlau los ntawm electrodeposition yog ib qho kev txo qis ntawm cathodic. Electrodeposition yog txheej txheem uas cov hlau dawb los yog khi rau hauv lub cathode los ntawm kev siv lub peev xwm ntawm cov hlau sib txawv hauv cov electrolyte. Cov tshuaj tiv thaiv electrochemical ntawm hlau ion rov qab, txoj kev yooj yim tshaj plaws ntawm cov hlau rov qab yog qhov ncaj qha txo cov hlau cations Mn plus plus ne-1-→M Qee zaum, cov hlau tsis muaj nyob hauv lub xeev dawb ionic, tab sis nyob rau hauv ib qho organic los yog inorganic complex Lub koom haum lub xeev ntawm tej yam tshwm sim. Siv tooj liab complexes ua piv txwv, cov tshuaj tiv thaiv deposition nyob rau lub sij hawm no yog: CuCl32- plus e-1 → Cu plus 3CI-.
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