Improvement in iron activation ability of alachlor Fenton-like oxidation by ascorbic acid

Bolobajev, Juri; Trapido, Marina; Goi, Anna

doi:10.1016/j.cej.2015.06.115

Cited by 94 publications

(26 citation statements)

References 37 publications

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“…(2). This result is in agreement with the findings of Bolobajev et al in their investigation of AA enhanced Fenton reaction [25]. Additionally, the complexation of Fe(III)/Fe(II) by AA and AA degradation products would also prevent the precipitation of dissolved iron, which was beneficial to HO• generation [38].…”

Section: Resultssupporting

confidence: 91%

“…However, HA and some of its products (i.e., N 2 O and NO 2 − ) might be toxic [24]. Bolobajev et al reported the improvement of HO• generation for alachlor degradation by Fenton-like reaction with the addition of AA [25]. The effects of AA, HA, p-hydroquinone, oxalic, gallic, and humic acids on a heterogeneous Fenton-like system with an iron-loaded natural zeolite as catalyst were compared in Fukuchi’s study.…”

Section: Introductionmentioning

confidence: 99%

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Application of ascorbic acid to enhance trichloroethene degradation by Fe(III)-activated calcium peroxide

Zhang

Brusseau

et al. 2017

Chemical Engineering Journal

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The enhancement effect of an environmentally friendly reducing agent, ascorbic acid (AA), on trichloroethene (TCE) degradation by Fe(III)-activated calcium peroxide (CP) was evaluated. The addition of AA accelerated the transformation of Fe(III) to Fe(II), and the complexation of Fe(III)/Fe(II) with AA and its products alleviated the precipitation of dissolved iron. These impacts enhanced the generation of reactive oxygen species (ROSs). Investigation of ROSs using chemical probe tests, electron paramagnetic resonance (EPR) tests, and radical scavenger tests strongly confirm large production of hydroxyl radicals (HO•) that is responsible for TCE degradation. The generation of Cl− from the degraded TCE was complete in the enhanced CP/Fe(III)/AA system. The investigation of solution matrix effects showed that the TCE degradation rate decreases with the increase in solution pH, while Cl−, SO42− and NO3− anions have minor impact. Conversely, HCO3− significantly inhibited TCE degradation due to pH elevation and HO• scavenging. The results of experiments performed using actual groundwater indicated that an increase in reagent doses are required for effective TCE removal. In summary, the potential effectiveness of the CP/Fe(III)/AA oxidation system for remediation of TCE contaminated groundwater has been demonstrated. Additional research is needed to develop the system for practical implementation.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Application of ascorbic acid to enhance trichloroethene degradation by Fe(III)-activated calcium peroxide

Zhang

Brusseau

et al. 2017

Chemical Engineering Journal

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“…This was because Fe(III) could coordinate with AA to form Fe(III)-AA complex both in solution or on the surface of iron based materials(Figure 2c). The electron transfer from AA to both surface and dissolved Fe(III) thus resulted in the effective Fe(III)/Fe(II) cycle[22,[24][25][26][27][28]. As expected, the reductive effect of AA also promoted the Fe(III)/Fe(II) cycle during the alachlor degradation in the AA/Fe@Fe2O3/H2O2 system.…”

mentioning

confidence: 77%

Ascorbic acid/Fe@Fe2O3: A highly efficient combined Fenton reagent to remove organic contaminants

Hou

Huang

et al. 2016

Journal of Hazardous Materials

214

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In this study, we demonstrate that the combination of ascorbic acid and Fe@Fe2O3 core-shell nanowires (AA/Fe@Fe2O3) offers a highly efficient Fenton reagent. This combined Fenton reagent exhibited extremely high activity on the decomposition of H2O2 to produce OH for the degradation of various organic contaminants, including rhodamine B, methylene blue, alachlor, atrazine, siduron, lincomycin, and chloroamphenicol. The contaminant degradation constants in the AA/Fe@Fe2O3/H2O2 Fenton systems were 38-53 times higher than those in the conventional homogeneous Fenton system (Fe(II)/H2O2) at pH 3.8. Moreover, the OH generation rate constant in the AA/Fe@Fe2O3/H2O2 Fenton system was 1-3 orders of magnitudes greater than those of heterogeneous Fenton systems developed with other iron-containing materials (α-FeOOH, α-Fe2O3, FeOCl, and so on). The high activity of AA/Fe@Fe2O3 was attributed to the effective Fe(III)/Fe(II) cycle and the iron-ascorbate complex formation to stabilize ferrous ions with desirable and steady concentrations. During the AA/Fe@Fe2O3/H2O2 Fenton process, ascorbic acid served as a reducing and complexing reagent, enabling the reuse of Fe@Fe2O3 nanowires. We systematically investigated the alachlor and ascorbic acid degradation and found that they could be effectively degraded in the AA/Fe@Fe2O3/H2O2 system, accompanying with 100% of dechlorination and 92% of denitrification. This study sheds light on the importance of Fe(III)/Fe(II) cycle for the design of high efficient Fenton system and provides an alternative pathway for the organic contaminants removal.

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“…Zero-valent iron (ZVI), ferrous iron (Fe 2+ ), and ferric iron (Fe 3+ ) are the most commonly used activators [7~9]. When using ferrous ion for activating persulfate, a large amount of soluble Fe 2+ will instantly react with persulfate to rapidly release SO 4 − ·.…”

Section: Introductionmentioning

confidence: 99%

Activation performance and mechanism of a novel heterogeneous persulfate catalyst: metal–organic framework MIL-53(Fe) with Fe^II/Fe^III mixed-valence coordinatively unsaturated iron center

Wan

et al. 2017

Catal. Sci. Technol.

139

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In this work, a novel effective heterogeneous catalyst metal-organic framework MIL-53(Fe) has been synthesized for the purpose of activating persulfate (PS). Catalytic performance of MIL-53(Fe) activated under different vacuum conditions was investigated; stability and reusability of the catalyst were evaluated, and the activation mechanism was also investigated. The results indicated that vacuum activation could cause variation of the FeII/FeIII relative amount ratio of the catalyst, and thus would change the catalytic activities of MIL-53(Fe), because FeII or FeIII CUS (coordinative unsaturated metal site) are alternative active sites. It was found that MIL-53(Fe)-2 exhibits good performance for PS activation and could be used for multiple cycles. A removal rate of 98% for Orange G was obtained within 120min (95.7% mineralization efficiency), and 94.3% was attained in the fifth cycle. The mechanism of the activation of PS by MIL-53(Fe) was also suggested, which involves a predominant heterogeneous reaction and an auxiliary homogeneous reaction. The findings of this study provide new insight into the application of the reactive metal-organic frameworks in activating persulfate for the degradation of environmental contaminants.

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Improvement in iron activation ability of alachlor Fenton-like oxidation by ascorbic acid

Cited by 94 publications

References 37 publications

Application of ascorbic acid to enhance trichloroethene degradation by Fe(III)-activated calcium peroxide

Application of ascorbic acid to enhance trichloroethene degradation by Fe(III)-activated calcium peroxide

Ascorbic acid/Fe@Fe2O3: A highly efficient combined Fenton reagent to remove organic contaminants

Activation performance and mechanism of a novel heterogeneous persulfate catalyst: metal–organic framework MIL-53(Fe) with Fe^II/Fe^III mixed-valence coordinatively unsaturated iron center

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Improvement in iron activation ability of alachlor Fenton-like oxidation by ascorbic acid

Cited by 94 publications

References 37 publications

Application of ascorbic acid to enhance trichloroethene degradation by Fe(III)-activated calcium peroxide

Application of ascorbic acid to enhance trichloroethene degradation by Fe(III)-activated calcium peroxide

Ascorbic acid/Fe@Fe2O3: A highly efficient combined Fenton reagent to remove organic contaminants

Activation performance and mechanism of a novel heterogeneous persulfate catalyst: metal–organic framework MIL-53(Fe) with FeII/FeIII mixed-valence coordinatively unsaturated iron center

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Activation performance and mechanism of a novel heterogeneous persulfate catalyst: metal–organic framework MIL-53(Fe) with Fe^II/Fe^III mixed-valence coordinatively unsaturated iron center