Degradation of ibuprofen by a synergistic UV/Fe(III)/Oxone process

Rao, Yongfang; Xue, Dan; Pan, Huaimin; Feng, Jiangtao; Li, Yingjie

doi:10.1016/j.cej.2015.07.057

Cited by 88 publications

(30 citation statements)

References 63 publications

(79 reference statements)

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“…PMS, as the major component of the commercial chemical Oxone (2KHSO 5 ·KHSO 4 ·K 2 SO 4 ), is a water‐soluble, environmentally friendly, safe to handle strong and stable oxidizing reagents. The cost of PMS ($2.2 per kg) is close to that of H 2 O 2 ($1.5 per kg) . Besides, as the solid oxidant, PMS is much easier to store and transport than commercial H 2 O 2 solution.…”

Section: Introductionmentioning

confidence: 89%

“…However, since PMS itself is far more chemically stable in solutions and has very low reactivity with contaminants, activation processes are very necessary for its application [19][20][21][22][23][24][25]. Recently, related studies [19][20][21][22][23][24][25] indicate that ultrasonic, UV light, high temperatures and several transition metal ions such as Co 21 , Ag 1 , Cu 21 , Fe 21 , Fe 31 , etc. have significant effects for activating Oxone solution to produce sulfate radicals and hydroxyl radicals.…”

Section: Introductionmentioning

confidence: 99%

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Removal of nitric oxide from flue gas using sulfate/hydroxyl radicals from activation of oxone with cobalt and high temperature

Liu

Wang

et al. 2017

Env Prog and Sustain Energy

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A simple and efficient method for removing NO from flue gas using sulfate and hydroxyl free radicals from activation of Oxone with cobalt and high temperature has been developed. A comparison of NO removal efficiencies and the yields of sulfate and hydroxyl free radicals in several reaction systems were carried out. Co2+ concentration, Oxone concentration, solution pH, flue gas flow rate, stirring rate, solution temperature, and NO inlet concentration were evaluated as the key factors impacting on NO removal efficiency. The highest removal efficiency of 94.9% for NO was achieved under optimal conditions. The sulfate and hydroxyl radicals as the major reactive species which are responsible for removing NO were determined using ESR spectrometer. The NO is finally oxidized to nitric acid through a series of redox reactions. The chemical reaction mechanism of NO removal has also been proposed. These results prove the feasibility of this new NO removal technology. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1013–1021, 2017

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Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Removal of nitric oxide from flue gas using sulfate/hydroxyl radicals from activation of oxone with cobalt and high temperature

Liu

Wang

et al. 2017

Env Prog and Sustain Energy

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“…So far, advanced oxidation processes (AOPs) have been found to be one of the most promising methods to treat persistent organic pollutants in water [3][4][5][6][7]. Due to the in-situ formed highly reactive and non-selective hydroxyl radicals (HO•) during the process, AOPs are capable of mineralizing almost all organic compounds to CO 2 , H 2 O, and small organic compounds [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Kinetic and Mechanistic Study of Rhodamine B Degradation by H2O2 and Cu/Al2O3/g-C3N4 Composite

et al. 2020

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The classic Fenton reaction, which is driven by iron species, has been widely explored for pollutant degradation, but is strictly limited to acidic conditions. In this work, a copper-based Fenton-like catalyst Cu/Al2O3/g-C3N4 was proposed that achieves high degradation efficiencies for Rhodamine B (Rh B) in a wide range of pH 4.9–11.0. The Cu/Al2O3 composite was first prepared via a hydrothermal method followed by a calcination process. The obtained Cu/Al2O3 composite was subsequently stabilized on graphitic carbon nitride (g-C3N4) by the formation of C−O−Cu bonds. The obtained composites were characterized through FT-IR, XRD, TEM, XPS, and N2 adsorption/desorption isotherms, and the immobilized Cu+ was proven to be active sites. The effects of Cu content, g-C3N4 content, H2O2 concentration, and pH on Rh B degradation were systematically investigated. The effect of the catalyst dose was confirmed with a specific reaction rate constant of (5.9 ± 0.07) × 10−9 m·s−1 and the activation energy was calculated to be 71.0 kJ/mol. In 100 min 96.4% of Rh B (initial concentration 20 mg/L, unadjusted pH (4.9)) was removed in the presence of 1 g/L of catalyst and 10 mM of H2O2 at 25 °C, with an observed reaction rate constant of 6.47 × 10−4 s−1. High degradation rates are achieved at neutral and alkaline conditions and a low copper leaching (0.55 mg/L) was observed even after four reaction cycles. Hydroxyl radical (HO·) was identified as the reactive oxygen species by using isopropanol as a radical scavenger and by ESR analysis. HPLC-MS revealed that the degradation of Rh B on Cu/Al2O3/CN composite involves N-de-ethylation, hydroxylation, de-carboxylation, chromophore cleavage, ring opening, and the mineralization process. Based on the results above, a tentative mechanism for the catalytic performance of the Cu/Al2O3/g-C3N4 composite was proposed. In summary, the characteristics of high degradation rate constants, low ion leaching, and the excellent applicability in neutral and alkaline conditions prove the Cu/Al2O3/g-C3N4 composite to be a superior Fenton-like catalyst compared to many conventional ones.

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“…Rao et al [26] conducted a study on ibuprofen degradation by UV/Fe/PS system and observed that simultaneous application of UVand Fe has a significant role in persulfate activating and facilitate the degradation process. Until this part of the research, the role of UV and Fe in DMP degradation was expressed.…”

Section: Introductionmentioning

confidence: 99%

Degradation of dimethyl phthalate using persulfate activated by UV and ferrous ions: optimizing operational parameters mechanism and pathway

Badi

Esrafili

Pasalari

et al. 2019

J Environ Health Sci Engineer

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The present study aimed to model and optimize the dimethyl phthalate (DMP) degradation from aqueous solution using UV C / Na 2 S 2 O 8 /Fe 2+ system based on the response surface methodology (RSM). A high removal efficiency (97%) and TOC reduction (64.2%) were obtained under optimum conditions i.e. contact time = 90 min, SPS concentration = 0.601 mM/L, Fe 2+ = 0.075 mM/L, pH = 11 and DMP concentration = 5 mg/L. Quenching experiments confirmed that sulfate radicals were predominant radical species for DMP degradation. The effect of CO 3 − on DMP degradation was more complicated than other aquatic background anions. The possible pathway for DMP decomposition was proposed according to HPLC and GC-MS analysis. The average oxidation state (AOS) and carbon oxidation state (COS) values as biodegradability indicators demonstrated that the UV C /SPS/Fe 2+ system can improve the bioavailability of DMP over the time. Finally, the performance of UV C /SPS/Fe 2+ system for DMP treatment in different aquatic solutions: tap water, surface runoff, treated and raw wastewater were found to be 95.7, 88.5, 80.5, and 56.4%, respectively.

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Degradation of ibuprofen by a synergistic UV/Fe(III)/Oxone process

Cited by 88 publications

References 63 publications

Removal of nitric oxide from flue gas using sulfate/hydroxyl radicals from activation of oxone with cobalt and high temperature

Removal of nitric oxide from flue gas using sulfate/hydroxyl radicals from activation of oxone with cobalt and high temperature

Kinetic and Mechanistic Study of Rhodamine B Degradation by H2O2 and Cu/Al2O3/g-C3N4 Composite

Degradation of dimethyl phthalate using persulfate activated by UV and ferrous ions: optimizing operational parameters mechanism and pathway

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