Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió acceptadaData de publicació
Tots els drets reservats
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/155524
Electrochemical destruction of trans-cinnamic acid by advanced oxidation processes: kinetics, mineralization, and degradation route
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
Acidic solutions of trans-cinnamic acid at pH 3.0 have been comparatively treated by anodic oxidation with electrogenerated H2O2 (AO-H2O2), electro-Fenton (EF) and photoelectro-Fenton (PEF). The electrolytic experiments were carried out with a boron-doped diamond (BDD)/air-diffusion cell. The substrate was very slowly abated by AO-H2O2 because of its low reaction rate with oxidizing ¿OH produced from water discharge at the BDD anode. In contrast, its removal was very rapid and at similar rate by EF and PEF due to the additional oxidation by ¿OH in the bulk, formed from Fenton's reaction between cathodically generated H2O2 and added Fe2+. The AO-H2O2 treatment yielded the lowest mineralization. The EF process led to persistent final products like Fe(III) complexes, which were quickly photolyzed upon UVA irradiation in PEF to give an almost total mineralization with 98% total organic carbon removal. The effect of current density and substrate concentration on all the mineralization processes was examined. GC-MS analysis of electrolyzed solutions allowed identifying five primary aromatics and one heteroaromatic molecule, whereas final carboxylic acids like fumaric, acetic and oxalic were quantified by ion-exclusion HPLC. From all the products detected, a degradation route for trans-cinnamic acid is proposed.
Matèries (anglès)
Citació
Citació
FLORES TAPIA, Nelly esther, THIAM, Abdoulaye, RODRÍGUEZ GONZÁLEZ, Rosa ma., CENTELLAS MASUET, Francesc a., CABOT JULIÀ, Pere-lluís, GARRIDO PONCE, José antonio, BRILLAS, Enric, SIRÉS SADORNIL, Ignacio. Electrochemical destruction of trans-cinnamic acid by advanced oxidation processes: kinetics, mineralization, and degradation route. _Environmental Science and Pollution Research_. 2017. Vol. 24, núm. 7, pàgs. 6071-6082. [consulta: 20 de gener de 2026]. ISSN: 0944-1344. [Disponible a: https://hdl.handle.net/2445/155524]