I se tulaga lautele, o le electrochemical oxidation e faasino i le faagasologa atoa o le electrochemistry, lea e aofia ai le tuusao pe le tuusao electrochemical reactions e tutupu i le electrode e faavae i luga o mataupu faavae o le oxidation-reduction reactions. O nei gaioiga e faʻamoemoe e faʻaitiitia pe aveese mea filogia mai vai otaota.
Ile faauigaina vaapiapi, electrochemical oxidation e faasino tonu i le anodic process. I lenei faagasologa, o se vaifofo poʻo se faʻamalologa e faʻafeiloaʻi i totonu o se cell electrolytic, ma e ala i le faʻaaogaina o le saʻo saʻo, o le eletise e maua mai i le anode, e oʻo atu ai i le faʻamaʻiina o mea faʻapitoa. I le isi itu, e mafai ona faʻamaʻiina metala maualalo-valence i ion uʻamea maualuga-valence i le anode, ona auai lea i le faʻamaʻiina o mea faʻapitoa. E masani lava, o nisi vaega fa'atino i totonu o mea fa'aola e fa'aalia ai gaioiga fa'aeletise. I lalo o le faatosinaga a le eletise eletise, o le fausaga o nei vaega galue e oʻo i suiga, suia ai le vailaʻau o vailaʻau oona, faʻaitiitia o latou oona, ma faʻaleleia ai lo latou biodegradability.
E mafai ona faʻavasegaina faʻamaʻi eletise i ni ituaiga se lua: faʻamaʻi tuusaʻo ma faʻamaʻi le tuusao. O le fa'ama'iina sa'o (direct electrolysis) e aofia ai le ave'esea sa'o o mea filogia mai le suavai leaga e ala i le fa'ama'iina i le eletise. O lenei faagasologa e aofia uma ai faiga anodic ma cathodic. O le anodic process e aofia ai le faʻamaʻiina o mea filogia i luga o le anode, faʻaliliuina i latou i ni mea oona poʻo ni mea e sili atu ona faʻaleagaina, ma faʻaitiitia pe faʻaumatia ai mea filogia. O le faiga o le cathodic e aofia ai le faʻaitiitia o mea filogia i luga o le cathode ma e faʻaaoga muamua mo le faʻaitiitia ma le aveeseina o le hydrocarbons halogenated ma le toe faʻaleleia o metala mamafa.
O le cathodic process e mafai foi ona taʻua o le faʻaitiitia o le eletise. E aofia ai le fesiitaiga o eletise e faʻaitiitia ai ion uʻamea mamafa e pei o Cr6 + ma Hg2 + i totonu o latou tulaga faʻamaʻi maualalo. E le gata i lea, e mafai ona faʻaitiitia ai mea faʻapipiʻi chlorinated, suia i latou i ni mea e le oona poʻo ni mea e le oona, e faʻaleleia atili ai lo latou biodegradability:
R-Cl + H+ + e → RH + Cl-
O le fa'ama'iina fa'alaua'itele (le fa'aeletise fa'alaua'itonu) e aofia ai le fa'aogaina o vaila'au fa'ama'i fa'aeletise po'o mea fa'aitiitiga e fai ma fa'agaoioiga po'o fa'amalosi e fa'aliliu ai mea filogia i ni mea e fa'aitiitia ai le oona. E mafai ona toe fa'avasegaina le fa'aeletise fa'alaua'itonu i fa'agasologa e mafai ona fa'afo'isia ma le fa'afoliga. Fa'agasologa toe fa'afo'i (mediated electrochemical oxidation) e a'afia ai le toe fa'afouina ma le toe fa'aaogaina o ituaiga redox i le faagasologa o le eletise. O faiga e le mafai ona toe fa'afo'isia, i le isi itu, e fa'aogaina ai mea e maua mai i fa'aeletonika e le mafai ona fa'afoligaina, e pei o mea fa'ama'i malosi e pei o le Cl2, chlorates, hypochlorites, H2O2, ma le O3, e fa'amuta ai mea fa'aola. O faiga e le mafai ona toe fa'afo'isia e mafai fo'i ona fa'atupuina ai ni mea fa'ama'i fa'ama'i, e aofia ai eletoni fa'amalulu, ·HO fa'ama'i, ·HO2 (hydroperoxyl radicals), ma ·O2- radicals (superoxide anions), lea e mafai ona fa'aaogaina e fa'aleagaina ma fa'aumatia mea filogia e pei o le cyanide, phenols, COD (Chemical Oxygen Demand), ma S2- ions, e iu ai ina liua i latou i ni mea e le afaina.
I le tulaga o le anodic oxidation tuusaʻo, maualalo reactant concentrations e mafai ona faʻatapulaʻaina le faʻaogaina o le eletise eletise ona o le faʻaogaina o le tele o tapulaʻa, ae o lenei tapulaʻa e le o iai mo faiga faʻamaʻi tuusao. I le taimi o faʻamaʻi faʻamaʻi tuusaʻo ma le le tuusao, e mafai ona tupu faʻalavelave faʻapitoa e aofia ai le gaosiga o le H2 poʻo le O2 gas, ae o nei itu e mafai ona pulea e ala i le filifilia o mea eletise ma le mafai ona pulea.
O le fa'ama'i fa'aeletise ua maua e aoga tele mo le togafitia o le suavai leaga i le maualuga o le fa'aogaina o meaola, fa'alavelave lavelave, anoanoa'i o mea e fa'afefeteina, ma le maualuga o lanu. E ala i le fa'aogaina o anodes ma gaioiga fa'aeletise, e mafai e lenei tekonolosi ona fa'atupuina lelei fa'ama'i fa'ama'i hydroxyl. O lenei faiga e o'o atu ai i le fa'apa'iaina o mea fa'aleaganu'u faifai pea i mea e le o'ona, mea e mafai ona fa'aleagaina ma o latou minerale atoatoa i totonu o fa'aputuga pei o le carbon dioxide po'o carbonates.
Taimi meli: Sep-07-2023
