Ascorbic acid/Fe<sup>0</sup> composites as an effective persulfate activator for improving the degradation of rhodamine B

Wang, Xiangyu; Du, Yi; Liu, Huiling; Ma, Jun

doi:10.1039/c8ra01506f

Cited by 20 publications

(8 citation statements)

References 40 publications

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“…A number of reports have highlighted the electrochemical interactions that dyes, such as Rhodamine B exhibit with ascorbic acid [4,[52][53][54][55][56]. Studies have shown that Rhodamine B [57][58][59][60][61], and a number of other related dyes [62][63][64], can form reactive oxygen compounds following the dyes' transformation to their excited state by the absorption of light [65].…”

Section: Effect Of Ascorbic Acid On Rhodamine B Differential Pulse Vo...mentioning

confidence: 99%

Voltammetric Behaviour of Rhodamine B at a Screen-Printed Carbon Electrode and Its Trace Determination in Environmental Water Samples

Honeychurch

2022

Sensors

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The voltammetric behaviour of Rhodamine B was studied at a screen-printed carbon electrode (SPCE), by cyclic and differential pulse voltammetry. Cyclic voltammograms exhibited two reduction peaks (designated R1 and R2) generated from the reduction of the parent compound through, first, one electron reduction (R1) to give a radical species, and then a further one-electron, one-proton reduction to give a neutral molecule (R2). On the reverse positive-going scan, two oxidation peaks were observed. The first, O1, resulted from the oxidation of the species generated at R2, and the second, O2, through the one-electron oxidation of the amine group. The nature of the redox reactions was further investigated by observing the effect of scan rate and pH on the voltammetric behaviour. The developed SPCE method was evaluated by carrying out Rhodamine B determinations on a spiked and unspiked environmental water sample. A mean recovery of 94.3% with an associated coefficient of variation of 2.9% was obtained. The performance characteristics indicated that reliable data may be obtained for Rhodamine B measurements in environmental water samples using this approach.

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Section: Effect Of Ascorbic Acid On Rhodamine B Differential Pulse Vo...mentioning

confidence: 99%

Voltammetric Behaviour of Rhodamine B at a Screen-Printed Carbon Electrode and Its Trace Determination in Environmental Water Samples

Honeychurch

2022

Sensors

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“…•À to participate in the reaction (Wang et al 2018). However, too high Fe 2þ concentration would generate too much nZVI.…”

Section: Effect Of Fe 2þ Concentration On Rh B Degradationmentioning

confidence: 99%

Enhanced catalytic activity and stability of composite of cellulose film and nano zero-valent iron on Juncus effusus for activating peroxydisulfate to degrade Rhodamine B dye

Zhang

et al. 2022

Water Science and Technology

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In this study, a novel peroxydisulfate (PDS) activator (CF-nZVI-JE) was prepared via in-situ loading nano zero-valent iron (nZVI) on Juncus effusus (JE) followed with wrapping a layer of cellulose film (CF). The CF-nZVI-JE had the same 3D structure as the JE, being easy to separate from aqueous solution. The loaded nZVI existed single nanoparticles with a size of 60–100 nm except chain-type agglomeration of nanoparticles due to the stabilization of JE fibers. The activation performance of the CF-nZVI-JE for PDS was evaluated with Rhodamine B (Rh B) as a representative pollutant. Under the optimal activating conditions, the degradation rate of Rh B reached 99% within 30 min in the CF-nZVI-JE/PDS system. After five cycles, the degradation rate of Rh B was still over 85%, suggesting that the CF-nZVI-JE had good reusability. More interestingly, SO4·− and ·OH radicals were simultaneously detected in the CF-nZVI-JE/PDS system, but only SO4·− existed in the JE-ZVI/PDS system, suggesting the different activation mechanism. Meanwhile, the introduction of CF not only facilitated to the mineralization of Rh B but also significantly reduced the release amount of iron ions. Hence, the CF-nZVI-JE can be employed as a promising PDS activator for the treatment of organic wastewater.

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“…Small degradation (<10% PCP removal) was observed in the binary systems except for Fe 3 O 4 /AA, which removed 67% of PCP (Figure 2). A plausible explanation for higher efficiency of Fe 3 O 4 /AA as compared to the other binary systems is the activation of dissolved O 2 and the formation of superoxide radicals, which can either degrade the target pollutant or form hydroxyl radicals in acidic conditions (reactions 4-7) [12,26]. In addition to the formation of Fe(II)-ascorbate complexes that contribute toward higher oxidation efficiency, ascorbic acid decreased the solution pH from 7.2 to 3.8.…”

Section: Combined Treatments In Batch Slurry Experimentsmentioning

confidence: 99%

Enhancement of Pentachlorophenol Removal in a Historically Contaminated Soil by Adding Ascorbic Acid to H2O2/Magnetite System

et al. 2021

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Development of new tools to improve the efficiency of iron minerals in promoting Fenton oxidation for environmental remediation is a highly promising field. Here, we examine for the first time the role of ascorbic acid (AA) in improving the magnetite (Fe3O4)-mediated Fenton oxidation to remove pentachlorophenol (PCP) in a historically contaminated soil. Experiments were performed in batch and flow-through conditions. In batch slurry experiments, the combination of Fe3O4/AA/H2O2 removed up to 95% of PCP as compared to the 43% removal by Fe3O4/H2O2. Dissolved Fe(II) measurements and Mössbauer spectroscopy highlight the role of AA in increasing the Fe(II) generation. Therefore, its presence enabled the Fe3O4 to maintain its structural Fe(II) content even after the oxidation reaction. Despite kinetic limitations in water-saturated columns, use of Fe3O4/AA/H2O2 removed about 70% of PCP contrary to the 20% PCP removal with Fe3O4/H2O2. This oxidation performance was affected by an injection flow rate or column residence time of AA and H2O2 in columns. Thus, the presence of AA significantly improved the ability of magnetite in promoting the Fenton reaction. Owing to the crucial role of AA in the Fe(II)/Fe(III) redox cycling, a mixed-valent character of magnetite makes it a potential catalyst for Fenton oxidation of organic pollutants.

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Ascorbic acid/Fe⁰ composites as an effective persulfate activator for improving the degradation of rhodamine B

Cited by 20 publications

References 40 publications

Voltammetric Behaviour of Rhodamine B at a Screen-Printed Carbon Electrode and Its Trace Determination in Environmental Water Samples

Voltammetric Behaviour of Rhodamine B at a Screen-Printed Carbon Electrode and Its Trace Determination in Environmental Water Samples

Enhanced catalytic activity and stability of composite of cellulose film and nano zero-valent iron on Juncus effusus for activating peroxydisulfate to degrade Rhodamine B dye

Enhancement of Pentachlorophenol Removal in a Historically Contaminated Soil by Adding Ascorbic Acid to H2O2/Magnetite System

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Ascorbic acid/Fe0 composites as an effective persulfate activator for improving the degradation of rhodamine B

Cited by 20 publications

References 40 publications

Voltammetric Behaviour of Rhodamine B at a Screen-Printed Carbon Electrode and Its Trace Determination in Environmental Water Samples

Voltammetric Behaviour of Rhodamine B at a Screen-Printed Carbon Electrode and Its Trace Determination in Environmental Water Samples

Enhanced catalytic activity and stability of composite of cellulose film and nano zero-valent iron on Juncus effusus for activating peroxydisulfate to degrade Rhodamine B dye

Enhancement of Pentachlorophenol Removal in a Historically Contaminated Soil by Adding Ascorbic Acid to H2O2/Magnetite System

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Ascorbic acid/Fe⁰ composites as an effective persulfate activator for improving the degradation of rhodamine B