Exploring mechanisms of different active species formation in heterogeneous Fenton systems by regulating iron chemical environment

Ye, Yin; Lv, Ruolin; Zhang, Weiming; Lu, Junhe; Ren, Yi; Li, Xiaoyang; Lv, Lu; Hua, Ming; Pan, Bo

doi:10.1016/j.apcatb.2021.120282

Cited by 51 publications

(7 citation statements)

References 45 publications

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“…However, SA and ATZ were difficult to remove by the systems, the k 1 values of which were 0.01675–0.03145 and 0.01184–0.01333 min –1 , respectively. Similar regulation was also obtained by previous studies with high-valent metals as active species. , …”

Section: Resultssupporting

confidence: 90%

Comparative Investigation of Doping Cobalt in Graphitic Carbon Nitride with Different Precursors for Peracetic Acid Activation: Decontamination Performance, Catalytic Mechanisms, and Practicability

Ren

et al. 2023

Ind. Eng. Chem. Res.

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In this study, three different cobalt-doped graphitic carbon nitrides (Co/C 3 N 4 ) were developed with precursors of urea, dicyandiamide, and melamine to activate peracetic acid. Optimal conditions of pH 4.0 and the cobalt ratio were obtained, with high decontamination performance and low leaching. Characterizations of Co/C 3 N 4 indicate that Co/C 3 N 4 synthesized with different precursors showed similar chemical and crystal structures while exhibiting differences in surface morphology and pore structure. Due to the high specific surface area and pore volume, Co/C 3 N 4 with a precursor of urea showed the best activity, k 1 , for carbamazepine removal, which was 0.07193 min −1 , higher than those with precursors of dicyandiamide (0.05084 min −1 ) and melamine (0.03499 min −1 ). The main active species for decontamination was identified by quenching experiments, chemical trapping, electron paramagnetic resonance analysis, and isotope labeling, and the results suggest that high-valent cobalt was the main active species and HO • showed minor efficiency for pollutant degradation. The degradation pathway of carbamazepine was proposed, and the results further confirm the main active species of high-valent cobalt, which mainly reacted with the amino group. Moreover, the practicability of Co/C 3 N 4activated peracetic acid was evaluated by recycling use, different pollutant treatments, and real wastewater treatment. The results indicate the systems showed better decontamination performance for carbamazepine, sulfamethoxazole, and bisphenol S, could effectively resist the interference of the substrate in real wastewater, and could efficiently remove CBZ within five reuse cycles. This study understood the activity and mechanisms of Co/C 3 N 4 -activated peracetic acid with different precursors, which might give new ideas on supporter structure design for Fenton-like catalysis improvement.

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Section: Resultssupporting

confidence: 90%

Comparative Investigation of Doping Cobalt in Graphitic Carbon Nitride with Different Precursors for Peracetic Acid Activation: Decontamination Performance, Catalytic Mechanisms, and Practicability

Ren

et al. 2023

Ind. Eng. Chem. Res.

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“…Reports have confirmed that UiO-66 via amino substitution can modulate the chemical environment of Fe and the charge density around Fe, resulting in more ˙OH production. 61 Based on these results and discussions, a possible mechanism for Fenton catalysis of MB by the MFC@Mn-NH 2 -UiO-66@IL composite catalyst is proposed (Fig. 9).…”

Section: Resultsmentioning

confidence: 85%

IL-functionalized Mn(ii)-doped core–shell Fe₃O₄@Zr-MOF nanomaterials for the removal of MB from wastewater based on dual adsorption/Fenton catalysis

Wang

Chen

et al. 2022

New J. Chem.

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“…Next, the formation of Fe(V) through reaction in the Fe(VI)–proline–CBZ system was investigated experimentally using a probe molecule, PMSO. High-valent iron species selectively convert PMSO to PMSO 2 , , indicating Fe(V) generation in the system. As shown in Figure , the formation of PMSO 2 was seen, and there was a stoichiometric transformation from PMSO to PMSO 2 .…”

Section: Resultsmentioning

confidence: 99%

Oxidation of Pharmaceuticals by Ferrate(VI)–Amino Acid Systems: Enhancement by Proline

et al. 2023

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The occurrence of micropollutants in water threatens public health and ecology. Removal of micropollutants such as pharmaceuticals by a green oxidant, ferrate(VI) (Fe VI O 4 2− , Fe(VI)) can be accomplished. However, electron-deficient pharmaceuticals, such as carbamazepine (CBZ) showed a low removal rate by Fe(VI). This work investigates the activation of Fe(VI) by adding nine amino acids (AA) of different functionalities to accelerate the removal of CBZ in water under mild alkaline conditions. Among the studied amino acids, proline, a cyclic AA, had the highest removal of CBZ. The accelerated effect of proline was ascribed by demonstrating the involvement of highly reactive intermediate Fe(V) species, generated by one-electron transfer by the reaction of Fe(VI) with proline (i.e., Fe(VI) + proline → Fe(V) + proline • ). The degradation kinetics of CBZ by a Fe(VI)−proline system was interpreted by kinetic modeling of the reactions involved that estimated the rate of the reaction of Fe(V) with CBZ as (1.03 ± 0.21) × 10 6 M −1 s −1 , which was several orders of magnitude greater than that of Fe(VI) of 2.25 M −1 s −1 . Overall, natural compounds such as amino acids may be applied to increase the removal efficiency of recalcitrant micropollutants by Fe(VI).

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Exploring mechanisms of different active species formation in heterogeneous Fenton systems by regulating iron chemical environment

Cited by 51 publications

References 45 publications

Comparative Investigation of Doping Cobalt in Graphitic Carbon Nitride with Different Precursors for Peracetic Acid Activation: Decontamination Performance, Catalytic Mechanisms, and Practicability

Comparative Investigation of Doping Cobalt in Graphitic Carbon Nitride with Different Precursors for Peracetic Acid Activation: Decontamination Performance, Catalytic Mechanisms, and Practicability

IL-functionalized Mn(ii)-doped core–shell Fe₃O₄@Zr-MOF nanomaterials for the removal of MB from wastewater based on dual adsorption/Fenton catalysis

Oxidation of Pharmaceuticals by Ferrate(VI)–Amino Acid Systems: Enhancement by Proline

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Exploring mechanisms of different active species formation in heterogeneous Fenton systems by regulating iron chemical environment

Cited by 51 publications

References 45 publications

Comparative Investigation of Doping Cobalt in Graphitic Carbon Nitride with Different Precursors for Peracetic Acid Activation: Decontamination Performance, Catalytic Mechanisms, and Practicability

Comparative Investigation of Doping Cobalt in Graphitic Carbon Nitride with Different Precursors for Peracetic Acid Activation: Decontamination Performance, Catalytic Mechanisms, and Practicability

IL-functionalized Mn(ii)-doped core–shell Fe3O4@Zr-MOF nanomaterials for the removal of MB from wastewater based on dual adsorption/Fenton catalysis

Oxidation of Pharmaceuticals by Ferrate(VI)–Amino Acid Systems: Enhancement by Proline

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IL-functionalized Mn(ii)-doped core–shell Fe₃O₄@Zr-MOF nanomaterials for the removal of MB from wastewater based on dual adsorption/Fenton catalysis