Removal of chlorpheniramine in a nanoscale zero-valent iron induced heterogeneous Fenton system: Influencing factors and degradation intermediates

Wang, Lin; Yang, Juan; Li, Yongmei; Lv, Juan; Zou, Jinte

doi:10.1016/j.cej.2015.09.042

Cited by 104 publications

(31 citation statements)

References 49 publications

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“…The number of active sites increased with an increase in the nZVI-BC dose within the range of 0.1-0.3 g/L, leading to the release of more Fe 2+ to react with H 2 O 2 and the generation more •OH, which improved the removal efficiency. When the nZVI-BC dose further increased to 0.4 g/L, the ONZ removal efficiency may have decreased owing to the •OH scavenging effect of extra nZVI-BC through an undesirable reaction (Equation (13)) [14]. Consequently, the optimal nZVI-BC dose was 0.3 g/L in this study.…”

Section: Effect Of Nzvi-bc Dosementioning

confidence: 86%

“…The heterogeneous Fenton process using nZVI was employed for the degradation of organic contaminants, particularly in the treatment of personal care products [13,14]. However, nZVI was easily oxidized in the presence of oxygen and tended to aggregate because of high surface energy [15], which had detrimental effects on the stability and catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

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Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Zhang

Zhao

Yang

et al. 2020

IJERPH

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Biochar (BC)-supported nanoscale zero-valent iron (nZVI-BC) was investigated as a heterogeneous Fenton-like activator to degrade the antibiotic ornidazole (ONZ). The characterization of nZVI-BC indicated that BC could enhance the adsorption of ONZ and reduce the aggregation of nZVI. Thus, nZVI-BC had a higher removal efficiency (80.1%) than nZVI and BC. The effects of parameters such as the nZVI/BC mass ratio, pH, H 2 O 2 concentration, nZVI-BC dose, and temperature were systematically investigated, and the removal of ONZ followed a pseudo-second-order kinetic model. Finally, possible pathways of ONZ in the oxidation process were proposed. The removal mechanism included the adsorption of ONZ onto the surface of nZVI-BC, the generation of •OH by the reaction of nZVI with H 2 O 2 , and the oxidation of ONZ. Recycling experiments indicated that the nZVI-BC/H 2 O 2 system is a promising alternative for the treatment of wastewater containing ONZ.

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Section: Effect Of Nzvi-bc Dosementioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Zhang

Zhao

Yang

et al. 2020

IJERPH

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“…Wang and his co-workers investigated the removal of chlorpheniramine in nZVI catalyzed Fenton system. Chlorpheniramine (615 g/L) was completely oxidized after 60 min when the initial pH was 3.0, H 2 O 2 concentration was 0.1 mM, and the dosage of nZVI was 22.4 mg/L [18]. The pentachlorophenol (PCP) degradation process in the nZVI/H 2 O 2 system was also examined, and the degradation process was completed within 1 h. Moreover, magnetite (Fe 3 O 4 ) was found to be the main corrosion product of nZVI in the nZVI/H 2 O 2 system, it also performed well as an adsorbent and/or catalyst [19].…”

Section: Introductionmentioning

confidence: 99%

Removal of norfloxacin using coupled synthesized nanoscale zero-valent iron (nZVI) with H2O2 system: Optimization of operating conditions and degradation pathway

Zhang

Gao

et al. 2017

Separation and Purification Technology

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a b s t r a c tIn this study, nanoscale zero-valent iron (nZVI) was synthesized in the laboratory by the borohydride reduction method. nZVI was characterized by transmission electron microscopy (TEM), scan electronic microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). In addition, the degradation performance of norfloxacin (NOR) in nZVI/H 2 O 2 Fenton-like system was investigated in detail under various experimental conditions. It was found that the removal of NOR depended on its initial concentration, initial pH, temperature, H 2 O 2 concentration and nZVI dose. At the ambient temperature, the degradation rate of NOR by nZVI/H 2 O 2 Fenton-like reaction under the acidic medium (pH = 3-4) was more than 95% within 40 min of the reaction time, and the mineralization degree was around 50% in terms of total organic carbon (TOC) measurement. Optimal temperature for NOR removal was 308 K, and higher temperature would cause useless decomposition of H 2 O 2 and consequently reduction of NOR degradation. The degradation rate and total removal efficiency of NOR were favored by increasing the nZVI and H 2 O 2 dosages. The optimal conditions for NOR degradation were: initial pH = 4.0, H 2 O 2 concentration = 20 mmol/L, nZVI dose = 100 mg/L, temperature = 308 K. The rate constants (K obs ) of NOR degradation could be fitted well with a pseudo-second-order kinetic equation. Several degradation intermediates of NOR were detected and confirmed, including C 15 H 20 FN 3 O (m/z 278), C 9 H 11 FN 2 (m/z 167), C 7 H 7 FN 2 (m/z 139), and C 7 H 8 FN (m/z 126), respectively. Based on the identified intermediates and the Gaussian quantum statistics molecular bonding energy calculation, the possible pathway for NOR degradation under nZVI/H 2 O 2 Fenton-like reaction was discussed.

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“…The heterogeneous solid catalysts used for this purpose include iron oxides in bulk 6 or supported on carbon, [7][8][9][10] alumina, [11][12][13][14][15][16][17] or silica 18 ; pillared clays containing Fe 19,20 ; natural and artificial iron-exchanged zeolites 21,22 ; iron oxide natural minerals 23,24 ; mixed oxides 25 ; and zero-valent iron. [26][27][28] These catalysts, especially those containing Fe(III) oxides, need ultraviolet radiation to accelerate the reduction of Fe 3+ to Fe 2+ , since the reaction of Eqn (2) is much slower than the decomposition of H 2 O 2 in the presence of Fe 2+ indicated in Eqn (1). This is known as a photo-Fenton (homogeneous) 29 or photo-Fenton-like (heterogeneous) 30 process, which is generally more efficient than the non-irradiated Fenton process but has the drawback of higher operating costs in terms of energy and UV-lamp consumption.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization, and application of nano‐FeO_x/Al₂O₃/cordierite monolithic catalysts for heterogeneous dark Fenton reaction

Martínez

Fixman

Cánepa

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: Advanced oxidation processes are an interesting alternative for wastewater treatment. The classic Fenton process, involving ferrous ions and hydrogen peroxide, requires strict pH adjustment and further iron removal. To overcome these difficulties, heterogeneous reaction with solid catalysts has been proposed. Until now, the solid catalysts have been employed as powders in agitated batch reactors. In this work, the application of structured catalysts for processes in flow is proposed. Nano-FeO x /Al 2 O 3 /cordierite monolithic catalysts were prepared making firstly an alumina coating, and then impregnation with aqueous solution of iron nitrate at various concentrations. The synthesized catalysts were characterized using various techniques and then they were studied for the dark Fenton reaction. RESULTS: The coating adherence in the structured catalysts was better than 93%. Also, high homogeneity of the coating was confirmed. From results of physicochemical characterization, it was deduced that the active phase would consist of oligonuclear (FeO) n nanoclusters highly dispersed on the surface of the alumina support. The catalytic activity was evaluated in phenol peroxidation in aqueous phase (without light, pH 3, 30°C), as a model reaction. The monolithic catalysts were active and chemically stable. The most active catalyst (phenol conversion > 90% at 80 min of reaction) was reused 12 times. CONCLUSIONS: The monolithic catalysts show a high potential for application in heterogeneous dark Fenton-type reactions. Then, wastewater treatment by means of advanced oxidation processes could be carried out in continuous mode without further operation to separate the catalyst.

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Removal of chlorpheniramine in a nanoscale zero-valent iron induced heterogeneous Fenton system: Influencing factors and degradation intermediates

Cited by 104 publications

References 49 publications

Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Removal of norfloxacin using coupled synthesized nanoscale zero-valent iron (nZVI) with H2O2 system: Optimization of operating conditions and degradation pathway

Preparation, characterization, and application of nano‐FeO_x/Al₂O₃/cordierite monolithic catalysts for heterogeneous dark Fenton reaction

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Removal of chlorpheniramine in a nanoscale zero-valent iron induced heterogeneous Fenton system: Influencing factors and degradation intermediates

Cited by 104 publications

References 49 publications

Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Fenton-Like Oxidation of Antibiotic Ornidazole Using Biochar-Supported Nanoscale Zero-Valent Iron as Heterogeneous Hydrogen Peroxide Activator

Removal of norfloxacin using coupled synthesized nanoscale zero-valent iron (nZVI) with H2O2 system: Optimization of operating conditions and degradation pathway

Preparation, characterization, and application of nano‐FeOx/Al2O3/cordierite monolithic catalysts for heterogeneous dark Fenton reaction

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Preparation, characterization, and application of nano‐FeO_x/Al₂O₃/cordierite monolithic catalysts for heterogeneous dark Fenton reaction