Simultaneous generation of free radicals, Fe(IV) and Fe(V) by ferrate activation: A review - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemical Engineering Journal Année : 2024

Simultaneous generation of free radicals, Fe(IV) and Fe(V) by ferrate activation: A review

Résumé

Ferrate (FeVIO4 2-, Fe(VI)) is a green and effective oxidant that has been extensively studied for removing organic pollutants in water and wastewater. However, practical applications of ferrate are limited due to selfdecomposition at nearly neutral pH and low removal efficiency for electron-deficient pollutants. Therefore, recent research has focused on activating Fe(VI). Although various methods for enhancing Fe(VI) oxidation efficacy have been explored and reviewed extensively, there remains a gap in the systematic comparison of the different highly reactive species involved in the Fe(VI) activation process. To bridge this gap, this review aims to comprehensively present the mechanisms, strategies, and efficiencies of generating key reactive species, including sulfate radicals (SO4 •-), hydroxyl radicals (•OH), and intermediate iron species (Fe(IV) and Fe(V)), in the Fe(VI) activation system. We observed that both iron intermediates and free radicals react at much higher rate constants than their Fe(VI) precursor, resulting in rapid abatement of organic pollutants. The oxidation characteristics of these active species in Fe(VI) activation are discussed. Finally, the practicability of each Fe(VI) activating strategy is evaluated for rapid and efficient removal of organic pollutants in water and wastewater.
Fichier sous embargo
Fichier sous embargo
0 2 15
Année Mois Jours
Avant la publication
vendredi 12 juillet 2024
Fichier sous embargo
vendredi 12 juillet 2024
Connectez-vous pour demander l'accès au fichier

Dates et versions

hal-04390371 , version 1 (12-01-2024)

Identifiants

Citer

Feilong Dong, Chuyun Fu, Mingbao Feng, Da Wang, Shuang Song, et al.. Simultaneous generation of free radicals, Fe(IV) and Fe(V) by ferrate activation: A review. Chemical Engineering Journal, 2024, 481, pp.148669. ⟨10.1016/j.cej.2024.148669⟩. ⟨hal-04390371⟩
6 Consultations
3 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More