2020
DOI: 10.1007/s11356-020-09236-8
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Removal of emerging pollutants in aqueous phase by heterogeneous Fenton and photo-Fenton with Fe2O3-TiO2-clay heterostructures

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Cited by 37 publications
(9 citation statements)
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“…Clay materials have been widely used as catalyst support in heterogeneous processes due to their high abundance, minimal toxicity and low cost [54]. These inorganic materials provide greater resistance to organic solvents and high thermal stability and prevent the agglomeration of nanoparticles [39].…”
Section: Supported Heterogeneous Fenton Catalystsmentioning
confidence: 99%
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“…Clay materials have been widely used as catalyst support in heterogeneous processes due to their high abundance, minimal toxicity and low cost [54]. These inorganic materials provide greater resistance to organic solvents and high thermal stability and prevent the agglomeration of nanoparticles [39].…”
Section: Supported Heterogeneous Fenton Catalystsmentioning
confidence: 99%
“…The enhancement of the Fenton reaction takes place by using ultraviolet-visible (UV-Vis) radiation (λ < 580 nm) (Figure 3A) generating additional hydroxyl radicals by (a) photoreduction of ferric ions to ferrous ions leading to the formation of iron complexes under acidic conditions (Equations ( 6) and ( 7)) and (b) hydrogen peroxide photolysis (Equation ( 8)) [54,83]. This oxidation-based technology produces biodegradable intermediates and almost total mineralization under optimum operational conditions.…”
Section: Photo-fentonmentioning
confidence: 99%
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“…Inhibition of the Fenton process due to the solubility of the iron species can be circumvented with the use of ligands where a large number of recent studies focus on the use of ligands like EDDS to operate the reactors at a neutral pH. Generally, the operation pH is at pH 7, with some studies running it at pH 3 [111,116]. More research is on homogenous Fenton, which has a higher reaction kinetics as compared to heterogeneous Fenton.…”
Section: Photo-fentonmentioning
confidence: 99%
“…Therefore, current technologies have not been optimized for the elimination of micropollutants, requiring more specific research in this regard. Several technologies have been proposed and researched to eliminate emerging contaminants from wastewater, including coagulation-flocculation [19] and advanced oxidation processes (AOPs) such as ozonation [20], photocatalysis [21], wet air oxidation [22], and wet air oxidation promoted by hydrogen peroxide [23]. However, processes based on the adsorption of micropollutants onto activated carbon have been presented as the most interesting alternative in WWTPs, since this operation is characterized by its simplicity, low cost, and the non-generation of polluting by-products [24][25][26].…”
Section: Introductionmentioning
confidence: 99%