Ukadaulo wa Electro-Fenton

Zipangizo zoyeretsera madzi akuda za Electro-Fenton zimadalira kwambiri mfundo za Fenton catalytic oxidation, zomwe zikuyimira njira yapamwamba yoyeretsera madzi yomwe imagwiritsidwa ntchito powononga ndi kuchiza madzi akuda okhala ndi kuchuluka kwakukulu, poizoni, komanso zachilengedwe.

Njira yogwiritsira ntchito Fenton reagent inapangidwa ndi wasayansi wa ku France Fenton mu 1894. Cholinga chachikulu cha Fenton reagent reaction ndi kupanga ma hydroxyl radicals (•OH) kuchokera ku H2O2 pamaso pa Fe2+. Kafukufuku wa ukadaulo wa electro-Fenton unayamba m'zaka za m'ma 1980 ngati njira yogonjetsera zofooka za njira zachikhalidwe za Fenton ndikuwonjezera magwiridwe antchito a mankhwala. Ukadaulo wa Electro-Fenton umaphatikizapo kupanga kosalekeza kwa Fe2+ ndi H2O2 kudzera mu njira zamagetsi, ndipo zonse ziwiri zimachitapo kanthu nthawi yomweyo popanga ma hydroxyl radicals omwe amagwira ntchito kwambiri, zomwe zimapangitsa kuti mankhwala achilengedwe awonongeke.

Kwenikweni, imapanga mwachindunji ma reagents a Fenton panthawi ya electrolysis. Mfundo yayikulu ya electro-Fenton reaction ndi kusungunuka kwa mpweya pamwamba pa chinthu choyenera cha cathode, zomwe zimapangitsa kuti hydrogen peroxide (H2O2) ipangidwe ndi electrochemical. H2O2 yopangidwayo imatha kuchitapo kanthu ndi Fe2+ catalyst mu yankho kuti ipange oxidizing agent wamphamvu, hydroxyl radicals (•OH), kudzera mu Fenton reaction. Kupanga kwa •OH kudzera mu electro-Fenton process kwatsimikiziridwa kudzera mu mayeso a chemical probe ndi njira za spectroscopic, monga spin trapping. Mu ntchito zothandiza, mphamvu ya oxidation yamphamvu yosasankha ya •OH imagwiritsidwa ntchito kuti ichotse bwino mankhwala osinthika achilengedwe.

O2 + 2H+ + 2e → H2O2;

H2O2 + Fe2+ → [Fe(OH)2]2+ → Fe3+ + •OH + OH-.

Ukadaulo wa Electro-Fenton umagwiritsidwa ntchito makamaka pochiza madzi otayidwa kuchokera ku malo otayira zinyalala, madzi okhuthala, ndi madzi otayidwa a mafakitale ochokera ku mafakitale monga mankhwala, mankhwala, mankhwala ophera tizilombo, utoto, nsalu, ndi ma electroplating. Ungagwiritsidwe ntchito limodzi ndi zida zamakono zopangira okosijeni kuti ziwongolere kwambiri kuwonongeka kwa madzi otayidwa pamene akuchotsa CODCr. Kuphatikiza apo, umagwiritsidwa ntchito pochiza madzi otayidwa kuchokera ku malo otayira zinyalala, madzi okhuthala, ndi madzi otayidwa a mafakitale ochokera ku mankhwala, mankhwala, mankhwala ophera tizilombo, utoto, nsalu, ma electroplating, ndi zina zotero, zomwe zimathandiza kuchepetsa CODCr kuti ikwaniritse miyezo yotulutsira zinyalala. Ukhozanso kuphatikizidwa ndi "zida za electro-Fenton zoyendetsedwa ndi pulsed" kuti muchepetse ndalama zonse zogwirira ntchito.