Sono-activated persulfate oxidation of bisphenol A: Kinetics, pathways and the controversial role of temperature

Darsinou, Barbara; Frontistis, Zacharias; Αντωνοπούλου, Μαρία; Konstantinou, Ioannis; Mantzavinos, Dionissios

doi:10.1016/j.cej.2015.06.061

Cited by 208 publications

(40 citation statements)

References 42 publications

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“…Even though PS can act as a direct oxidant, its reaction rates are limited for more recalcitrant contaminants. The combination US/PS using low frequency ultrasound (20−100 kHz) has been widely investigated and has been proved to be effective for removing several kinds of pollutants such as dyes [21], pharmaceuticals [20], endocrine disruption compounds [22], chlorinated aliphatic hydrocarbons [23,24], aromatic hydrocarbons [25], heavy metals [26] and others [27,28] (20 kHz) were also conducted to show the dependence of the PS-enhanced effect to the operating frequency. An attempt was made to explain the mechanism of the sono-activation of PS as well as the dependence of the PS-enhanced effect to the operational conditions.…”

Section: Introductionmentioning

confidence: 99%

Persulfate-enhanced sonochemical degradation of naphthol blue black in water: Evidence of sulfate radical formation

Ferkous

Merouani

Hamdaoui

et al. 2017

Ultrasonics Sonochemistry

136

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This work explores the effect of persulfate (PS) on the sonochemical degradation of organic pollutants taking naphthol blue black (NBB), an anionic diazo dye, as a substrate model. The sonolytic experiments were conducted in the absence and presence of PS under various experimental conditions including acoustic power (10-80W), frequency (20 and 585kHz) and saturating gas (argon, air and nitrogen). Experimental results showed that PS decomposition into sulfate radical (SO) takes place by sonolysis and increasing PS concentration up to 1g/L would result in an increase in the NBB degradation rate. It was found that the PS-enhanced effect was strongly operating parameters dependent. The positive effect of PS decreased with increasing power and the best enhancing effect was obtained for the lowest acoustic power. Correspondingly, the PS-enhanced effect was more remarkable at low frequency (20kHz) than that observed at high frequency ultrasound (585kHz). Nitrogen saturating gas gave the best enhanced effect of PS than argon and air atmospheres. Theoretical (computer simulation of bubble collapse) and experimental measurements of the yields of free radical generation under the different experimental conditions have been made for interpreting the obtained effects of PS on the sonochemical degradation of the dye pollutant. The experimental findings were attributed to the fact that radical-radical recombination reactions occur at faster rate than the radical-organic reaction when the concentration of free radicals is too high (at higher sonochemical conditions).

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Section: Introductionmentioning

confidence: 99%

Persulfate-enhanced sonochemical degradation of naphthol blue black in water: Evidence of sulfate radical formation

Ferkous

Merouani

Hamdaoui

et al. 2017

Ultrasonics Sonochemistry

136

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“…The analytical protocol (columns, mobile phase, detector) is described in detail elsewhere (Darsinou et al, 2015). The limit of detection was 4.7 mg/L and the limit of quantitation was 12.4 mg/L.…”

Section: Methodsmentioning

confidence: 99%

“…Liquid chromatography time-of-flight mass spectrometry (LC-TOF-MS) operated in negative ionization mode was used for the identification of transformation by-products (TBPs) as described in detail in our previous work (Darsinou et al, 2015). LC analyses were run with water (LC-MS grade) with 0.01% formic acid (solvent A) and acetonitrile (solvent B) as mobile phase with a flow rate of 0.3 mL/ min.…”

Section: Methodsmentioning

confidence: 99%

“…Finally, sulfate radicals react with water at all pH values leading to the formation of hydroxyl radicals, which become the main oxidizing species at alkaline conditions (Matzek and Carter, 2016;Zhao et al, 2014), according to equations (5) and (6) Although sulfate radicals have a lower redox potential than hydroxyl radicals, they are more selective towards certain organics (Darsinou et al, 2015;Lutze et al, 2015) and this may justify the reactivity recorded at lower pH values, where sulfate radicals prevail.…”

Section: Effect Of Solution Phmentioning

confidence: 99%

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Activation of sodium persulfate by magnetic carbon xerogels (CX/CoFe) for the oxidation of bisphenol A: Process variables effects, matrix effects and reaction pathways

et al. 2017

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a b s t r a c tAn advanced oxidation process comprising sodium persulfate (SPS) and a novel magnetic carbon xerogel was tested for the degradation of bisphenol A (BPA), a model endocrine-disrupting compound. The catalyst, consisting of interconnected carbon microspheres with embedded iron and cobalt microparticles, was capable of activating persulfate to form sulfate and hydroxyl radicals at ambient conditions.The pseudo-first order degradation rate of BPA in ultrapure water (UPW) was found to increase with (i) increasing catalyst (25e75 mg/L) and SPS (31e250 mg/L) concentrations, (ii) decreasing BPA concentration (285e14,200 mg/L), and (iii) changing pH from alkaline to acidic values (9e3).Besides UPW, tests were conducted in drinking water, treated wastewater, groundwater and surface water; interestingly, the rate in UPW was always lower than in any other matrix containing several organic and inorganic constituents. The effect of natural organic matter (in the form of humic acids) and alcohols was detrimental to BPA degradation owing to the scavenging of radicals. Conversely, chlorides at concentrations greater than 50 mg/L had a positive effect due to the formation and subsequent participation of chlorine-containing radicals.Liquid chromatography time-of-flight mass spectrometry was employed to identify major transformation by-products (TBPs) of BPA degradation in the absence and presence of chlorides; in the latter case, several chlorinated TBPs were detected confirming the role of Cl-related radicals. Based on TBPs, main reaction pathways are proposed.

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“…The reactions of SO 4 •− radicals are selective and can take place easily via DET from the electron‐rich aromatic ring to the sulfate radical. In contrast to SO 4 •− radicals, hydroxyl radicals are non‐selective and can react with the aromatic ring in the aqueous solution via either hydrogen abstraction route or addition reaction . The observed by‐products can be further degraded into lower‐molecular‐weight molecules such as oxalic, malic and formic acids and finally mineralized to H 2 O and CO 2 through continuous attack of SO 4 •− and • OH radicals …”

Section: Resultsmentioning

confidence: 99%

Heterogeneous catalytic degradation of methylparaben using persulfate activated by natural magnetite; optimization and modeling by response surface methodology

Rostamifasih

Pasalari

Mohammadi

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND In this study, a naturally magnetic semiconductor mineral (NM‐SCM) was used as a highly active, easily separable and green catalyst to activate persulfate (SPS) for the degradation of methylparaben (MeP) in aqueous solution by a heterogeneous catalyst system (SPS/NM‐SCM). NM‐SCM properties were characterized using field emission scanning electron microscope (FESEM), Brunauer–Emmett–Teller (BET), X‐ray diffraction (XRD), energy‐dispersive X‐ray (EDX) and vibrating sample magnetometer (VSM) analyses. The effects of contributing factors such as solution pH, NM‐SCM loading, SPS dosage and initial MeP concentration on MeP degradation were analyzed using response surface methodology (RSM) and Box–Behnken design (BBD). RESULTS The RSM model obtained from the present study (R2 > 0.99) showed a suitable correlation between the predicted values and experimental results of MeP degradation. Under optimized conditions (pH 6.5, SPS 5 mmol L−1, NM‐SCM 0.3 g L−1 and MeP 10 µmol L−1), a removal efficiency of 99.5% and a mineralization degree of 37% were achieved. The removal efficiency of MeP was reduced in the presence of inorganic ions as follows: chloride > nitrate > carbonate > phosphate. After five successive catalyst reuses, the degradation efficiency was >90%, indicating the excellent potential reusability of NM‐SCM catalyst. CONCLUSION Owing to the generation of highly reactive oxidizing species (SO4•−) and easy separation of the catalyst, the integration of NM‐SCM and SPS has great potential for the degradation of MeP from water and wastewater matrices. © 2019 Society of Chemical Industry

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Sono-activated persulfate oxidation of bisphenol A: Kinetics, pathways and the controversial role of temperature

Cited by 208 publications

References 42 publications

Persulfate-enhanced sonochemical degradation of naphthol blue black in water: Evidence of sulfate radical formation

Persulfate-enhanced sonochemical degradation of naphthol blue black in water: Evidence of sulfate radical formation

Activation of sodium persulfate by magnetic carbon xerogels (CX/CoFe) for the oxidation of bisphenol A: Process variables effects, matrix effects and reaction pathways

Heterogeneous catalytic degradation of methylparaben using persulfate activated by natural magnetite; optimization and modeling by response surface methodology

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