Highly active iron-containing silicotungstate catalyst for heterogeneous Fenton oxidation of 4-chlorophenol

In this study, Zn-CNT composites were prepared by the infiltration fusion method and characterized by TEM, XPS and N 2 adsorption/desorption experiments. . When 4-CP was spiked in the secondary effluent of a municipal wastewater treatment plant, the removal efficiency of 4-CP and TOC was 47.0% and 45.6%, respectively, under the above-mentioned conditions. The intermediate products were detected by LC-MS and IC, and the possible degradation pathway of 4-CP and the reaction mechanism of the Zn-CNTs/O 2 /Fe 2+ system were tentatively proposed.

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“…40,41 The optimal Zn-CNTs dosage was 2.0 g L À1 in this experiment. , the 4-CP removal efficiency was 75.6% and 98.8%, respectively.…”

Section: 33mentioning

confidence: 99%

Fenton degradation of 4-chlorophenol using H₂O₂in situ generated by Zn-CNTs/O₂ system

Liu

Yang

et al. 2017

RSC Adv.

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“…The reaction was sampled in every 10-20 min, and the samples were filtrated by a 0.45 μm syringe filter hydrophilic membrane to eliminate the particles that may detached from Fe@CC. The concentration of the ARG was determined by spectrophotometry on a spectrophotometer according to the following formula (1).…”

Section: Catalytic Reactionmentioning

confidence: 99%

“…Fenton reaction is one of the extensively studied advanced oxidation process that is effective for pollutants treatment [1][2][3][4][5]. This process shows obvious advantages on oxidizing recalcitrant substances, and it is usually used as pretreatment process to increase the biodegradability of the wastewater by increasing the B/C value [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Fe Oxides Loaded on Carbon Cloth by Hydrothermal Process as an Effective and Reusable Heterogenous Fenton Catalyst

2018

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Iron based heterogeneous Fenton catalysts are attracting much attention for its economic and environmental friendly characteristics. In this study, iron oxides loaded carbon cloth (assigned as Fe@CC) was prepared using hydrothermal hydrolysis of Fe(NO 3 ) 3 . The specific surface area of Fe@CC determined by N 2 adsorption-desorption Brunauer-Emmett-Teller method was up to 1325.5 m 2 /g, which increased by 81.8% compared with that of native carbon cloth mainly due to the loading of iron oxide. XPS (X-ray photoelectron spectroscopy) spectra confirmed that the iron oxide on the carbon surface included mainly FeOOH. Its heterogeneous Fenton-like activity was determined using Acid Red G as a model substrate for degradation. Fe@CC maintained high and relatively stable activity during 11 tests, and it showed high COD (Chemical Oxygen Demand) removal efficiency and high apparent H 2 O 2 utilization efficiency. The homogeneous Fenton reaction using the amount of leached Fe(III) suggested that the surficial reaction on Fe@CC was dominant. The stability and the mechanism for gradual decrease of activity during the first 4 tests were also discussed.

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“…Metal ion served as a kind of homogeneous catalyst that is very hard to recycle or reuse after the degradation process. Moreover, a large amount of iron sludge consisting of Fe(OH) 2 or Fe(OH) 3 produced during the process with the addition of Fe 2+ needs to be disposed of . All the above drawbacks greatly limit large‐scale application of the pulsed high‐voltage discharge system.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, a large amount of iron sludge consisting of Fe(OH) 2 or Fe(OH) 3 produced during the process with the addition of Fe 2+ needs to be disposed of. 27 All the above drawbacks greatly limit large-scale application of the pulsed high-voltage discharge system.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Fe/AC Fenton‐like catalyst and heterogeneous catalysis in decolorization of Sunset Yellow by pulsed high‐voltage discharge

Zhu

Liu

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND A new Fe/AC heterogeneous Fenton‐like catalyst was prepared using a dipping–sintering method. The prepared catalyst was characterized by X‐ray diffraction and scanning electron microscopy. The decolorization of Sunset Yellow was conducted in a self‐designed pulsed high‐voltage discharge system by the catalysis of the prepared heterogeneous catalyst. Effects of preparation conditions of catalyst (carrier material, sintering temperature and dipping time) and operating conditions (catalyst dosage, pH and treatment method) on decolorization efficiency were investigated. RESULTS Spherical activated carbon (AC) was selected as the carrier material and the optimal dipping time and sintering temperature were 8 h and 350 °C, respectively. The efficiency of decolorization of Sunset Yellow was above 90% after 30 min of a pulsed high‐voltage discharge process with 5 g heterogeneous catalyst and at pH 2.00. The utilization of copper mesh not only enhanced the decolorization of Sunset Yellow but also facilitated the reusability of the prepared heterogeneous catalyst. The efficiency of decolorization of Sunset Yellow with prepared Fe/AC heterogeneous Fenton‐like catalyst (5 g) was even a little higher than that with homogeneous catalyst (1.635 mmol L−1 Fe2+). The decolorization efficiency remained above 90% after ten recycles of the catalyst, indicating that the prepared heterogeneous catalyst has good stability and reusability. In addition, a possible catalytic mechanism for the decolorization reaction in a pulsed high‐voltage discharge system with prepared Fe/AC heterogeneous Fenton‐like catalyst was proposed by determination of H2O2 and ·OH concentrations in deionized water. CONCLUSIONS The prepared Fe/AC heterogeneous Fenton‐like catalyst efficiently degrades Sunset Yellow wastewater in a pulsed high‐voltage discharge system. © 2016 Society of Chemical Industry

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Highly active iron-containing silicotungstate catalyst for heterogeneous Fenton oxidation of 4-chlorophenol

Cited by 42 publications

References 37 publications

Fenton degradation of 4-chlorophenol using H₂O₂in situ generated by Zn-CNTs/O₂ system

Fenton degradation of 4-chlorophenol using H₂O₂in situ generated by Zn-CNTs/O₂ system

Fe Oxides Loaded on Carbon Cloth by Hydrothermal Process as an Effective and Reusable Heterogenous Fenton Catalyst

Synthesis of a Fe/AC Fenton‐like catalyst and heterogeneous catalysis in decolorization of Sunset Yellow by pulsed high‐voltage discharge

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Highly active iron-containing silicotungstate catalyst for heterogeneous Fenton oxidation of 4-chlorophenol

Cited by 42 publications

References 37 publications

Fenton degradation of 4-chlorophenol using H2O2in situ generated by Zn-CNTs/O2 system

Fenton degradation of 4-chlorophenol using H2O2in situ generated by Zn-CNTs/O2 system

Fe Oxides Loaded on Carbon Cloth by Hydrothermal Process as an Effective and Reusable Heterogenous Fenton Catalyst

Synthesis of a Fe/AC Fenton‐like catalyst and heterogeneous catalysis in decolorization of Sunset Yellow by pulsed high‐voltage discharge

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Fenton degradation of 4-chlorophenol using H₂O₂in situ generated by Zn-CNTs/O₂ system

Fenton degradation of 4-chlorophenol using H₂O₂in situ generated by Zn-CNTs/O₂ system