Oxidative Degradation of MTBE by Pyrite-Activated Persulfate: Proposed Reaction Pathways

Liang, Chenju; Guo, Yi-Yu; Chien, Yi-Chi; Wu, Yan

doi:10.1021/ie100740d

Cited by 86 publications

(47 citation statements)

References 32 publications

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“…The higher water solubility and persistence of MTBE can cause it to move faster than many other component of gasoline when released into aquifer. The toxicity of MTBE to animals and humans is well documented and it has been established that the MTBE is carcinogenic to animals (Belpoggi et al, 1995, Kamalan et al, 2009Liang et al, 2010). Franklin (2000) reported that MTBE has become one of the most problematic pollutants in urban soils and groundwater worldwide.…”

Section: Introductionmentioning

confidence: 99%

Stabilization and Solidification of a Clay Soil Contaminated with MTBE

2017

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Stabilization and solidification a clay soil contaminated with MTBE Abstract:This paper presents an investigation into stabilization and solidification of a clay soil contaminated with MTBE (Methyl Butyl Ether) using two different agents (cement and mixture of bentonite and cement) through a program of laboratory experiments. The samples were prepared in two stages. In the first stage they were prepared with 20 and 30% cement but in the second stage they were prepared with 20 and 30% mixtures of bentonite and cement (with ratios of bentonite to cement equal to 1:1 and 3:1).Unconfined compression tests (UCT) and leaching tests using GC (Gas Chromatography) apparatus were conducted on the samples that were prepared in the above two stages at different curing times. The results show that by using cement, the strength of the soil is increased. The results of the leaching tests on contaminated soil show a major reduction in the concentration of MTBE. Adding cement to contaminated soil causes reduction in concentration of MTBE but by increasing the curing time the concentration of MTBE is increased. It is also indicted that using combination of bentonite and cement leads to reduction in MTBE concentration and the amount of reduction is decreased by increasing the curing time. The bentonite-cement ratio of 3:1 is more effective than 1:1 in reducing the concentration of MTBE.

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Section: Introductionmentioning

confidence: 99%

Stabilization and Solidification of a Clay Soil Contaminated with MTBE

2017

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“…Firstly, persulfate was used as oxidant for in situ chemical oxidation (ISCO) technology to remedy groundwater and soil contaminants. Through thermal or chemical activation, persulfate can be transformed into sulfate radicals with more powerful oxidation potential to degrade refractory pollutants in groundwater or soil [17][18][19][20]. With success of ISCO soil and groundwater remediation, sulfate radical-based AOPs were emerging applied to the wastewater treatment purpose.…”

Section: Introductionmentioning

confidence: 99%

UV irradiation catalyzed persulfate advanced oxidation process for decolorization of Acid Blue 113 wastewater

Shu

Chang

Huang

2015

Desalination and Water Treatment

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A B S T R A C TA UV/persulfate advanced oxidation process was proposed to decolorize and mineralize a synthesized Acid Blue 113 (AB113) dyeing wastewater. Various operating parameters which affected the removal efficiencies of dye and total organic carbon (TOC) such as reaction time, persulfate dosage, initial dye concentration, initial pH, and UV intensity were studied. Results presented effective removal of AB113 azo dye by UV/persulfate process based on both color and TOC indicators. However, reaction with either UV irradiation alone or persulfate alone can reach low-removal efficiency of AB113. In UV/persulfate process, the higher the persulfate dosage applied, the higher the color and TOC removal efficiencies can be obtained up to 6.3 mM persulfate concentration. The color removal efficiency and reaction rate constant decreased with increase in the initial dye concentration. The initial pH was shown no significant effect on removal efficiency. UV intensity affected AB113 removal efficiency significantly when the persulfate dosage was as low as 1.05 mM. Results of UVVisible spectrophotometry indicated the diminishing of chromophore group of AB113 at 566 nm and naphthalene rings at 272 nm.

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“…So far, the treatment of organic pollutants such as atrazine (Chan and Chu 2009), pharmaceuticals and personal care products (e.g. Chan et al 2010;Matta et al 2011;Nfodzo and Choi 2011;Rickman and Mezyk 2010), methyl tert-butyl ether (Liang et al 2010), polycyclic aromatic aromatic hydrocarbons (Wang et al 2008), phenols (e.g. Anipsitakis et al 2006;Yang et al 2008), and so on using SO 4 -Á has been reported.…”

Section: Introductionmentioning

confidence: 99%

Chemical oxidation of N,N-diethyl-m-toluamide by sulfate radical-based oxidation: kinetics and mechanism of degradation

Tay

Rahman

Abas

2012

Int. J. Environ. Sci. Technol.

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A study was undertaken in order to understand the kinetics and mechanism of the chemical oxidation of N,N-diethyl-m-toluamide, an insect repellent, by sulfate radical. In this experiment, sulfate radical was generated using peroxymonosulfate with iron(II) and cobalt(II) as activator. The second-order rate constant for the reaction of the sulfate radical with N,N-diethyl-m-toluamide was found to be (1.9 ± 0.1) 9 10 9 M -1 s -1 at pH 7 and a temperature of 25°C. Experiments for the chemical oxidation of N,N-diethyl-m-toluamide in river water and secondary wastewater revealed that the percentage of the removal of N,N-diethyl-m-toluamide was slightly influenced by the water matrices. However, the selected oxidation systems are not effective for the removal of N,N-diethyl-mtoluamide in seawater. Transformation by-products of N,N-diethyl-m-toluamide generated using peroxymonosulfate/iron(II) sulfate, peroxymonosulfate/iron(II) chloride, peroxymonosulfate/cobalt(II) sulfate and peroxymonosulfate/cobalt(II) chloride systems were identified. The results indicated that there are slight differences in the distributions of the transformation by-products detected depending on the activator. The common transformation by-products detected in all selected oxidation systems areMonohydroxylated N,N-diethyl-m-toluamide were detected only when the peroxymonosulfate/iron(II) system was applied. For the peroxymonosulfate/cobalt(II) systems, additional isomers of monohydroxylated N-ethyl-m-toluamide were detected. Peroxymonosulfate/cobalt(II) also transformed 2-(diethylamino)-1-m-tolylethanone into N-ethyl-N-(2-oxo-2-m-tolylethyl)acetamide and monohydroxylated 2-(ethyl(vinyl)amino)-1-m-tolylethanone as transformation by-products.

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Oxidative Degradation of MTBE by Pyrite-Activated Persulfate: Proposed Reaction Pathways

Cited by 86 publications

References 32 publications

Stabilization and Solidification of a Clay Soil Contaminated with MTBE

Stabilization and Solidification of a Clay Soil Contaminated with MTBE

UV irradiation catalyzed persulfate advanced oxidation process for decolorization of Acid Blue 113 wastewater

Chemical oxidation of N,N-diethyl-m-toluamide by sulfate radical-based oxidation: kinetics and mechanism of degradation

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