Humic acids as complexing agents to drive photo-Fenton at mild pH in saline matrices: Process performance and mechanistic studies

Vallés, I.; Santos Juanes, L.; Amat, A.M.; Palma, D.; Laurenti, E.; Bianco Prevot, A.; Arques, A.

doi:10.1016/j.jece.2023.111391

Cited by 4 publications

(1 citation statement)

References 39 publications

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“…In a recent review, García-Ballesteros et al [169] pointed out that HLSs, which can even be isolated from different wastes, are photosensitive and are able to generate ROS such as hydroxyl radicals and singlet oxygen or triplet excited states upon irradiation (Equations ( 21)-( 24)) [4,170]. This circumstance is particularly convenient when HLSs are complexed with iron to promote homogeneous (photo)-Fenton-like processes at mild pH, preventing Fe deactivation [171].…”

Section: Considerations On Chemical Compositions and Stabilitymentioning

confidence: 99%

An Overview of Environmental Catalysis Mediated by Hydrogen Peroxide

Rigoletto,

Laurenti,

Tummino

2024

Catalysts

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The use of hydrogen peroxide (produced in situ or ex situ) as the main agent in oxidative processes of environmental pollutant removal is widely studied. The degradation of water pollutants, such as dyes, pharmaceuticals, cosmetics, petroleum derivatives, and even pathogens, has been successfully obtained by different techniques. This review gives an overview of the more recent methods developed to apply oxidative processes mediated by H2O2 and other reactive oxygen species (ROS) in environmental catalysis, with particular attention to the strategies (Fenton-like and Bio-Fenton, photo- and electro-catalysis) and the materials employed. A wide discussion about the characteristics of the materials specifically studied for hydrogen peroxide activation, as well as about their chemical composition and morphology, was carried out. Moreover, recent interesting methods for the generation and use of hydrogen peroxide by enzymes were also presented and their efficiency and applicability compared with the Fenton and electro-Fenton methods discussed above. The use of Bio-Fenton and bi-enzymatic methods for the in situ generation of ROS seems to be attractive and scalable, although not yet applied in full-scale plants. A critical discussion about the feasibility, criticalities, and perspectives of all the methods considered completes this review.

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