Cov khoom siv kho dej khib nyiab Electro-Fenton feem ntau yog ua raws li cov ntsiab cai ntawm Fenton catalytic oxidation, uas sawv cev rau cov txheej txheem oxidation siab heev uas siv rau kev puas tsuaj thiab kev kho cov dej khib nyiab uas muaj cov concentration siab, lom, thiab organic.
Tus kws tshawb fawb Fabkis Fenton tau tsim txoj kev siv Fenton reagent hauv xyoo 1894. Lub ntsiab lus ntawm Fenton reagent reaction yog catalytic generation ntawm hydroxyl radicals (•OH) los ntawm H2O2 nyob rau hauv lub xub ntiag ntawm Fe2+. Kev tshawb fawb txog electro-Fenton technology tau pib hauv xyoo 1980s ua ib txoj hauv kev los kov yeej cov kev txwv ntawm cov txheej txheem Fenton ib txwm muaj thiab txhim kho kev ua haujlwm ntawm kev kho dej. Electro-Fenton technology cuam tshuam nrog kev tsim cov Fe2+ thiab H2O2 tas mus li los ntawm electrochemical txhais tau tias, nrog ob qho tib si tam sim ntawd reacting los tsim cov hydroxyl radicals uas muaj zog heev, ua rau muaj kev puas tsuaj ntawm cov organic compounds.
Yeej, nws ncaj qha tsim cov tshuaj Fenton reagents thaum lub sijhawm electrolysis. Lub hauv paus ntsiab lus ntawm electro-Fenton reaction yog kev yaj ntawm cov pa oxygen ntawm qhov chaw ntawm cov khoom siv cathode tsim nyog, ua rau lub tshuab hluav taws xob tsim cov hydrogen peroxide (H2O2). Cov H2O2 tsim tawm tuaj yeem cuam tshuam nrog Fe2+ catalyst hauv cov tshuaj kom tsim cov neeg sawv cev oxidizing muaj zog, hydroxyl radicals (•OH), los ntawm Fenton reaction. Kev tsim cov •OH los ntawm cov txheej txheem electro-Fenton tau lees paub los ntawm kev sim tshuaj lom neeg thiab cov txheej txheem spectroscopic, xws li spin trapping. Hauv kev siv tiag tiag, lub peev xwm oxidation tsis xaiv ntawm •OH yog siv los tshem tawm cov tshuaj organic recalcitrant.
O2 + 2H+ + 2e → H2O2;
H2O2 + Fe2+ → [Fe(OH)2]2+ → Fe3+ + •OH + OH-.
Cov thev naus laus zis Electro-Fenton feem ntau siv tau rau kev kho cov dej khib nyiab los ntawm cov chaw pov tseg, cov kua dej uas muaj zog, thiab cov dej khib nyiab los ntawm kev lag luam xws li tshuaj lom neeg, tshuaj, tshuaj tua kab, zas xim, ntaub, thiab electroplating. Nws tuaj yeem siv ua ke nrog cov khoom siv electrocatalytic advanced oxidation los txhim kho qhov biodegradability ntawm cov dej khib nyiab thaum tshem tawm CODCr. Tsis tas li ntawd, nws kuj siv rau kev kho cov dej khib nyiab los ntawm cov chaw pov tseg, cov kua dej uas muaj zog, thiab cov dej khib nyiab los ntawm kev lag luam tshuaj, tshuaj, tshuaj tua kab, zas xim, ntaub, electroplating, thiab lwm yam, ncaj qha txo CODCr kom ua tau raws li cov qauv tso tawm. Nws kuj tseem tuaj yeem ua ke nrog "pulsed electro-Fenton khoom siv" los txo cov nqi ua haujlwm tag nrho.
Lub sijhawm tshaj tawm: Cuaj hlis-07-2023
