Determination of hydroxyl radicals in advanced oxidation processes with dimethyl sulfoxide trapping and liquid chromatography

Tai, Chao; Peng, Jinfeng; Liu, Jingfu; Jiang, Guibin; Zou, Hong

doi:10.1016/j.aca.2004.08.019

Cited by 251 publications

(115 citation statements)

References 37 publications

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“…The concentrations of leaching Fe and Mn cations were determined on a PE-3100 Flame Atomic Absorption Spectrophotometer (FAAS) with the hollow-cathode lamps operate at the wavelength of 248.3 and 279.5 nm. The Å OH concentration was analyzed by High Performance Liquid Chromatography (HPLC) [40,41]. The experiment details of operation are provided in Text A.1 in Supplementary Data.…”

Section: Heterogeneous Fenton Reactionmentioning

confidence: 99%

The distinct effects of Mn substitution on the reactivity of magnetite in heterogeneous Fenton reaction and Pb(II) adsorption

Liang

Zhu

Wei

et al. 2014

Journal of Colloid and Interface Science

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Section: Heterogeneous Fenton Reactionmentioning

confidence: 99%

The distinct effects of Mn substitution on the reactivity of magnetite in heterogeneous Fenton reaction and Pb(II) adsorption

Liang

Zhu

Wei

et al. 2014

Journal of Colloid and Interface Science

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“…The probe compound should be characterized by few and very stable reaction products and by a well-known and established reaction constant with reactive radicals. Dimethyl sulfoxide [15], salicylic acid [16], phenols or pyrocathecols [17] are among the most commonly used compounds. Recently, Lindsey and Tarr [18] selected benzoic acid and n-propanol as chemical probes to quantify the hydroxyl radicals production in Fenton's systems, allowing to measure both hydroxyl radical formation rate and concentration.…”

Section: Introductionmentioning

confidence: 99%

Influence of the operating conditions on highly oxidative radicals generation in Fenton's systems

Ciotti

Baciocchi

Tuhkanen

2009

Journal of Hazardous Materials

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a b s t r a c tIn this work, an indirect method for estimating the total amount and concentration of oxidative radicals in aqueous and slurry-phase Fenton's systems was developed. This method, based on the use of benzoic acid as probe compound, was applied for evaluating the effect of the operating conditions on the radicals amount produced, their production efficiency (i.e. moles of radicals generated per mole H 2 O 2 ) and their concentration. A Rotatable Central Composite design (RCC) was used to select the operating conditions in order to get a statistically meaningful data set. Hydrogen peroxide and ferrous ion concentrations ranged between 0.2-1 mM and 0.2-0.5 mM, respectively; humic acid concentration between 0 and 15 mg/L, whereas the soil/water weight ratio in slurry-phase systems between 1:10 and 9:10. The probe compound concentration was 9 or 0.1 mM in experiments aimed to evaluate the total amount or concentration of oxidative radicals, respectively. The obtained results indicated that the amount of radicals generated in both aqueous and soil slurry Fenton's system increased with higher H 2 O 2 concentration and, more specifically, that their production efficiency increased with increasing Fe(II):H 2 O 2 molar ratio. Addition of dissolved organic compounds as humic acid did not notably affect the oxidative radicals amount and concentration. On the contrary, a one order of magnitude reduction in both radicals amount generated and concentration was observed when soil was added to the reaction environment.

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“…Since hydroxyl radical with E°= 2.80 V/ SHE is a much stronger oxidant than hydroxyphenol radical with oxidizing potential at 1.65 V/SHE (Brillas et al 2009), hydroxyl radical was still considered as the governing oxidant in the second stage of Fenton process. Furthermore, adsorption or complexation of DMSO with generated iron oxides is considered negligible, as DMSO cannot form complexes with iron or other metal ions (Tai et al 2004).…”

Section: Kinetics Of Dmso Degradation During Fluidized-bed Fenton Promentioning

confidence: 99%

Degradation of dimethyl sulfoxide through fluidized-bed Fenton process: kinetic analysis

Chen

Matira

et al. 2016

Int. J. Environ. Sci. Technol.

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In this study, fluidized-bed Fenton process (FBF) was used to degrade dimethyl sulfoxide (DMSO), one of the most widely used solvents. Oxidation by Fenton's reagent, Fe ?2 and H 2 O 2 , is one of the cheapest advanced oxidation processes due to the high availability of the reagents. FBF is a modified approach that reduces the large amount of iron oxide sludge formed in conventional Fenton process. The optimal treatment efficiencies by FBF with 2 h of reaction were 95.22 % of DMSO degradation and 34.38 % of COD removal at the conditions of 5 mM DMSO, 68.97 g/L SiO 2 carrier, pH initial 3.0, 5 mM Fe 2? , and 32.5 mM H 2 O 2 . The kinetic study was also done to investigate the two stages involved in the oxidation. The first stage fitted the zero reaction order with overall initial rate's apparent rate constant, k 1 , of -0.099. The second stage fitted the first order of DMSO degradation, with rate constant, k 2 , of -0.0005.

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Determination of hydroxyl radicals in advanced oxidation processes with dimethyl sulfoxide trapping and liquid chromatography

Cited by 251 publications

References 37 publications

The distinct effects of Mn substitution on the reactivity of magnetite in heterogeneous Fenton reaction and Pb(II) adsorption

The distinct effects of Mn substitution on the reactivity of magnetite in heterogeneous Fenton reaction and Pb(II) adsorption

Influence of the operating conditions on highly oxidative radicals generation in Fenton's systems

Degradation of dimethyl sulfoxide through fluidized-bed Fenton process: kinetic analysis

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