Sodium hydroxide-enhanced acetaminophen elimination in heat/peroxymonosulfate system: Production of singlet oxygen and hydroxyl radical

Cai, Hengyu; Zou, Jing; Lin, Jinbin; Li, Jiawen; Huang, Yixin; Zhang, Shuyin; Yuan, Baoling; Ma, Jun

doi:10.1016/j.cej.2021.132438

Cited by 137 publications

(26 citation statements)

References 72 publications

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“…As previously reported, TBA was mainly used to quench •OH, while ethanol had a strong quenching effect on both •OH and SO4 − • [39]. In addition, FFA was used as a quencher of 1 O2 according to previous reports [53]. When the concentrations of TBA were 1 and 5 mM (Figure 8a), DMP removal efficiencies decreased by 16% and 52%, respectively.…”

Section: Probable Mechanism and Reusabilitymentioning

confidence: 57%

Electrospinning of ZIF-67 Derived Co-C-N Composite Efficiently Activating Peroxymonosulfate to Degrade Dimethyl Phthalate

Pang

et al. 2022

Water

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In this work, an efficient cage-core peroxymonosulfate (PMS) catalyst was synthesized by applying an electrospinning–calcination process to the cobalt–zeolitic imidazole framework (ZIF-67) crystals for the catalytic degradation of dimethyl phthalate (DMP). The morphology and surface properties of the synthesized materials (ZIF-67, Z600 and ZP400/600/800) were well characterized. ZP600 showed great performance for the catalytic degradation of DMP in the initial pH range of 7.5–10.5. The removal rate of DMP could reach 90.4% in 60 min under optimum dosages of reagents (catalyst = 0.1 g/L, PMS = 0.5 mM, DMP = 6 ppm), and the mineralization degree of contaminant could reach 65%. By quenching experiments, it was determined that sulfate radical (SO4−·) and hydroxyl radical (·OH) dominated the degradation process. Moreover, due to the good magnetism, ZP600 could be easily separated from liquid and showed great reusability in five-cycle reaction experiments. Surprisingly, with the cover of cage-like polyacrylonitrile (PAN) fibers, the cobalt leaching amount of ZP600 decreased by about 87%. This study would expand the application of the electrospinning process in the development of functional materials for water purification.

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Section: Probable Mechanism and Reusabilitymentioning

confidence: 57%

Electrospinning of ZIF-67 Derived Co-C-N Composite Efficiently Activating Peroxymonosulfate to Degrade Dimethyl Phthalate

Pang

et al. 2022

Water

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“…In general, SO 5 •– has moderate oxidizing potential and formation efficiency. The production of SO 4 •– and • OH was detected by the EPR test with DMPO as the trapping agent . In Figure e, the signals of DMPO–SO 4 and DMPO–OH were not excited by the PP membrane, which suggests the noncatalytic nature of the PDA layer.…”

Section: Resultsmentioning

confidence: 93%

“…•− and • OH was detected by the EPR test with DMPO as the trapping agent. 33 In Figure 3e, the signals of DMPO−SO 4 and DMPO−OH were not excited by the PP membrane, which suggests the noncatalytic nature of the PDA layer. However, in the presence of PBA−LDH (LPP-20), both DMPO−SO 4 (1:1:1) and DMPO−OH (1:2:2:1) appeared, which implies that both SO 4…”

Section: Characterization and Morphology Of The Fabricated Membranementioning

confidence: 99%

Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation

Liu

Xue

et al. 2022

ACS EST Water

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In this study, a Prussian blue analogue (PBA)-intercalated magnesium aluminum hydrotalcite (PBA–LDH) material was used to successfully modify the membrane surface by layer-by-layer synthesis with an intermediate layer inspired by dopamine polymerization (polydopamine (PDA)). The PBA–LDH@PDA membrane was endowed with highly efficient peroxymonosulfate (PMS) activation and superb antifouling properties. Quenching experiments implied that SO4 •– mainly contributed to the sulfadiazine (SDZ) degradation in the PBA–LDH@PDA membrane-activated PMS system and performed well under various conditions. On the other hand, the PBA–LDH@PDA membrane was confirmed to exhibit separation by loose nanofiltration. The fouling performance of the membrane identified an extremely low flux attenuation even when 60 mg/L bovine serum albumin (BSA) was filtered. Multicycle filtration experiments demonstrated extremely low fouling accumulation of the membrane. The loose nanofiltration membrane with PMS activation properties possesses multiple advantages: activation of PMS by the filtration process provides a space in which the catalyst, oxidant, and foulant can completely react; the two goals of fouling mitigation and target foulant removal can be mutually realized by controlling the operating parameters (e.g., PMS dosage and filtration pressure). Overall, this study provides a beneficial strategy for improving the efficiency of membrane filtration and foulant removal.

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“…ESR and radical scavenging experiments were typical means to analyze the oxidation mechanism.Hydroxyl radicals (•OH), free chlorine, and superoxide radicals (HO 2 •/O 2 • − ) were considered as the main reactive oxides in the reaction process. TBA, NaHCO 3 , p-BQ as exclusive scavengers for hydroxyl radicals, free chlorine and superoxide radicals, respectively(Cai et al, 2022;Luna-Trujillo et al, 2020;Yang et al, 2018). Figure4showed that the addition of TBA or p-BQ barely inhibited the AN degradation.…”

mentioning

confidence: 92%

Singlet oxygen generation for selective oxidation of emerging pollutants in a flow-by electrochemical system based on natural air diffusion cathode

Xie

Yao

2022

Environ Sci Pollut Res

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The decay of free radicals involved in side reactions is one of the challenges faced by electrochemical degradation of organic pollutants. To this end, a non-radical oxidation process was constructed by a natural air diffusion cathode (ADC) and a RuO 2 -Ti anode for cathodic hydrogen peroxide activation by anodic chlorine evolution. The ADC fabricated by the carbon black of BP2000 produced a stable concentration of hydrogen peroxide of 339.94 mg/L (current e ciency of 73.4%) without aeration, which was superior to the cathode made by the carbon black of XC72. The ow-by electrochemical system consisted of an ADC and a RuO 2 -Ti anode showed high selectivity to aniline compared to benzoate.Quenching experiments revealed the main active intermediate responsible for the pollutant degradation was singlet oxygen ( 1 O 2 ), which was also identi ed by the electron spin resonance (ESR) analysis. Finally, the steady-stable content of 1 O 2 was quantitatively determined to be 6.25×10 − 11 M by the method of furfuryl alcohol (FFA) probe. Our ndings provide a fast, low energy consumption and well controlled electrochemical oxidation method for selective degradation of organic pollutants.

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Sodium hydroxide-enhanced acetaminophen elimination in heat/peroxymonosulfate system: Production of singlet oxygen and hydroxyl radical

Cited by 137 publications

References 72 publications

Electrospinning of ZIF-67 Derived Co-C-N Composite Efficiently Activating Peroxymonosulfate to Degrade Dimethyl Phthalate

Electrospinning of ZIF-67 Derived Co-C-N Composite Efficiently Activating Peroxymonosulfate to Degrade Dimethyl Phthalate

Layer-by-Layer-Assembled Loose Nanofiltration Membrane for Persulfate Activity Enhancement: Performance and Process Regulation

Singlet oxygen generation for selective oxidation of emerging pollutants in a flow-by electrochemical system based on natural air diffusion cathode

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