Sulfate radical-based degradation of polychlorinated biphenyls: Effects of chloride ion and reaction kinetics

Fang, Guodong; Dionysiou, Dionysios D.; Wang, Yu; Al-Abed, Souhail R.; Zhou, Dongmei

doi:10.1016/j.jhazmat.2012.05.074

Cited by 374 publications

(123 citation statements)

References 43 publications

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“…The way these ions interfere with the process is case-specific depending on the persulfate activation method, the type of substrate, the complexity of the water matrix and the concentration levels of the ions under consideration; in this respect, it is not surprising that various studies have reported both detrimental and beneficial effects of ions on substrate degradation (Matzek and Carter, 2016;Lutze et al, 2015;Bennedsen et al, 2012;Fang et al, 2012). The effect of chloride in the range 50e500 mg/L on BPA degradation over the CX/CoFe catalyst is shown in Fig.…”

Section: The Role Of Chloride Ionmentioning

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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Section: The Role Of Chloride Ionmentioning

confidence: 99%

“…Sulfate radicals primarily react with chloride to form chlorine radicals (equation (8)) that further react with chloride to form the dichloride radical (equation (9)) (Lutze et al, 2015;Bennedsen et al, 2012;Fang et al, 2012):…”

Section: The Role Of Chloride Ionmentioning

confidence: 99%

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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“…2-chlorobiphenyl (2-CB), by coupling Fe 2+ /Fe 3+ with peroxymonosulfate (PMS) (Rastogi et al, 2009). Sulfate radical-based AOPs were also tested for PCB removal and the presence of chloride ion inhibited their transformation (Fang et al, 2012). Persulfate oxidation processes were applied to PFOA using UV-visible light (Hori et al, 2005(Hori et al, , 2008 and PFOS using an UV lamp (Yang et al, 2013).…”

Section: Miscellaneousmentioning

confidence: 99%

“…They are a recognized class of aquatic pollutants with associated long-term risks both to humans and animals (Fang et al, 2012;Rastogi et al, 2009). Dioxins and dioxin-like compounds include three main classes of compounds, namely polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (PCB-DL).…”

Section: Polychlorinated Biphenyls (Pcbs) Dioxins and Dioxin-like Comentioning

confidence: 99%

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An overview on the advanced oxidation processes applied for the treatment of water pollutants defined in the recently launched Directive 2013/39/EU

Ribeiro

Nunes

Pereira

et al. 2015

Environment International

806

319

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Environmental pollution is a recognized issue of major concern since a wide range of contaminants has been found in aquatic environment at ng L −1 to μg L −1 levels.In the year 2000, a strategy was defined to identify the priority substances concerning aquatic ecosystems, followed by the definition of environmental quality standards (EQS) in 2008. Recently it was launched the Directive 2013/39/EU that updates the water framework policy highlighting the need to develop new water treatment technologies to deal with such problem. This review summarizes the data published in the last decade regarding the application of advanced oxidation processes (AOPs) to treat priority compounds and certain other pollutants defined in this Directive, excluding the inorganic species (cadmium, lead, mercury, nickel and their derivatives).The Directive 2013/39/EU includes several pesticides

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Oxidative absorption of NO by sodium persulfate coupled with Fe²⁺, Fe₃O₄, and H₂O₂

Gao

Kang

et al. 2014

Env Prog and Sustain Energy

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The oxidative absorption of nitric oxide (NO) by sodium persulfate (Na2S2O8) coupled with Fe2+, Fe3O4, and H2O2 was investigated in a bubble column reactor. Moreover, the effect of temperature on NO removal has been studied. At high temperatures, Fe2+ and Fe3O4 could effectively activate persulfate to form sulfate radicals, leading to high removal efficiency of NO. About 62% and 86% of NO were removed at 75 and 90°C, respectively. Also, the optimum Fe2+ concentration for 0.2 mol L−1 persulfate was 1.0 mmol L−1 at 75°C, under which the removal efficiency of NO was observed to be 89%. However, beyond 1.0 mmol L−1 Fe2+, the increase in Fe2+concentration was unfavorable to NO removal due to the scavenging of radicals by the excess Fe2+. Additionally, the presence of 2.85 mmol L−1 Fe3O4 increased the NO removal efficiency by 11% compared to that obtained in the absence of Fe3O4. It was proposed that activation ability of Fe3O4 to persulfate was attributed to Fe2+ on the Fe3O4 surface. Moreover, the addition of H2O2 led to the increase of the NO removal for some time, but followed by a drop because of the depletion of H2O2. It was suggested that H2O2 served as an oxidant rather than an activator of persulfate. © 2014 American Institute of Chemical Engineers Environ Prog, 2014 © 2014 American Institute of Chemical Engineers Environ Prog, 34: 117–124, 2015

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Sulfate radical-based degradation of polychlorinated biphenyls: Effects of chloride ion and reaction kinetics

Cited by 374 publications

References 43 publications

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

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

An overview on the advanced oxidation processes applied for the treatment of water pollutants defined in the recently launched Directive 2013/39/EU

Oxidative absorption of NO by sodium persulfate coupled with Fe²⁺, Fe₃O₄, and H₂O₂

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Sulfate radical-based degradation of polychlorinated biphenyls: Effects of chloride ion and reaction kinetics

Cited by 374 publications

References 43 publications

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

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

An overview on the advanced oxidation processes applied for the treatment of water pollutants defined in the recently launched Directive 2013/39/EU

Oxidative absorption of NO by sodium persulfate coupled with Fe2+, Fe3O4, and H2O2

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Product

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Oxidative absorption of NO by sodium persulfate coupled with Fe²⁺, Fe₃O₄, and H₂O₂