Electro-Fenton cov khoom siv kho dej khib nyiab feem ntau yog ua raws li cov hauv paus ntsiab lus ntawm Fenton catalytic oxidation, sawv cev rau cov txheej txheem oxidation siab heev uas siv rau kev degradation thiab kev kho mob ntawm high-concentration, lom, thiab organic wastewater.
Fenton reagent txoj kev tau tsim los ntawm Fabkis tus kws tshawb fawb Fenton hauv xyoo 1894. Lub ntsiab lus ntawm Fenton reagent cov tshuaj tiv thaiv yog cov txheej txheem catalytic ntawm hydroxyl radicals (•OH) los ntawm H2O2 nyob rau hauv muaj Fe2+. Kev tshawb fawb ntawm electro-Fenton thev naus laus zis tau pib hauv xyoo 1980s los ua ib txoj hauv kev los kov yeej cov kev txwv ntawm Fenton txoj hauv kev thiab txhim kho kev kho dej kom zoo. Electro-Fenton thev naus laus zis suav nrog kev tsim khoom txuas ntxiv ntawm Fe2 + thiab H2O2 los ntawm kev siv hluav taws xob, nrog rau ob qho tib si tam sim ntawd ua kom muaj zog hydroxyl radicals, uas ua rau kev puas tsuaj ntawm cov organic tebchaw.
Qhov tseem ceeb, nws ncaj qha tsim Fenton reagents thaum lub sij hawm electrolysis. Lub hauv paus ntsiab lus ntawm cov tshuaj tiv thaiv electro-Fenton yog kev sib cais ntawm cov pa oxygen ntawm cov khoom siv cathode, uas ua rau cov hluav taws xob tsim hluav taws xob ntawm hydrogen peroxide (H2O2). Cov khoom tsim H2O2 tuaj yeem hnov mob nrog Fe2 + catalyst hauv kev daws teeb meem los tsim cov tshuaj muaj zog oxidizing, hydroxyl radicals (•OH), los ntawm Fenton cov tshuaj tiv thaiv. Kev tsim khoom ntawm •OH los ntawm cov txheej txheem electro-Fenton tau raug lees paub los ntawm kev sojntsuam tshuaj lom neeg thiab cov txheej txheem spectroscopic, xws li spin trapping. Hauv kev siv cov tswv yim, qhov tsis xaiv muaj zog oxidation muaj peev xwm ntawm •OH yog siv los tshem tawm cov organic tebchaw recalcitrant zoo.
O2 + 2H + 2e → H2O2;
H2O2 + Fe2+ → [Fe(OH)2]2+ → Fe3+ + •OH + OH-.
Electro-Fenton thev naus laus zis feem ntau siv tau rau hauv kev kho cov dej khib nyiab los ntawm kev pov tseg, cov kua dej ntau, thiab cov dej khib nyiab los ntawm kev lag luam xws li tshuaj, tshuaj, tshuaj tua kab, dyeing, textile, thiab electroplating. Nws tuaj yeem siv ua ke nrog cov khoom siv electrocatalytic oxidation siab heev los txhim kho biodegradability ntawm cov dej khib nyiab thaum tshem CODCr. Tsis tas li ntawd, nws yog siv rau kev kho mob sib sib zog nqus ntawm cov dej khib nyiab los ntawm qhov chaw pov tseg, cov kua dej ntau, thiab cov dej khib nyiab los ntawm tshuaj lom neeg, tshuaj, tshuaj tua kab, dyeing, textile, electroplating, thiab lwm yam, ncaj qha txo CODCr kom tau raws li cov qauv tso tawm. Nws tseem tuaj yeem ua ke nrog "cov khoom siv hluav taws xob-Fenton" los txo cov nqi ua haujlwm tag nrho.
Post lub sij hawm: Sep-07-2023
