Kinetics of heat-assisted persulfate oxidation of methyl tert-butyl ether (MTBE)

Huang, Kun-Chang; Couttenye, Richard A.; Hoag, George E.

doi:10.1016/s0045-6535(02)00330-2

Cited by 523 publications

(177 citation statements)

References 23 publications

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“…Even though treatment methods of dye wastewater had been developed throughout the years, however the classical methods of disposal are not adequate due to the fact that partial oxidation or reduction of the chemical dyes would produce highly toxic byproducts. At the present time conventional practice of wastewater decontamination can be classified as biological [1], physical [2], chemical [3] and advanced oxidation process [4] methods. Beside these categories of treatment methods, the electrochemical methods have been proved to be very effective specifically to wastewater containing water soluble toxic inorganic and organic compounds [5,6]; these methods are mainly characterized by being inexpensive to operate and the systems are stable during the treatment operation.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and Photoelectrochemical Decoloration of Amaranth Dye Azo Using Composited Dimensional Stable Anodes

Salazar‐Gastélum¹,

Reynoso‐Soto²,

Lin³

et al. 2013

JEP

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In this paper we report the results of our experimental work conducted to decoloration of a well-known highly toxic Amaranth dye by electrochemical and photoelectrochemical methods. Used throughout this investigation were two different Dimensional Stable Anode (DSA) electrodes, namely, IrO 2 -Ru 2 O-SnO 2 -TiO 2 /Ti and Ru 2 O-SnO 2 -TiO 2 /Ti. The experimental results show that IrO 2 -Ru 2 O-SnO 2 -TiO 2 /Ti electrode has higher performance on amaranth decoloration than Ru 2 O-SnO 2 -TiO 2 /Ti electrode, but with the disadvantage of higher energy consumption. For higher degradation of Amaranth dye with both DSA electrodes, the process was carried out via photoelectrochemical method. Our experimental results clearly shown the decrease in absorbance of all UV-Vis peaks due to the mineralization of the azo dye; also, it was noteworthy photoelectrochemical process consumes less energy under the same experimental conditions than electrochemical process. The IrO 2 -Ru 2 O-SnO 2 -TiO 2 /Ti electrode reaches a higher degradation degree of Amaranth solutions than Ru 2 O-SnO 2 -TiO 2 /Ti electrode using a photoelectrochemical technique.

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Section: Introductionmentioning

confidence: 99%

Electrochemical and Photoelectrochemical Decoloration of Amaranth Dye Azo Using Composited Dimensional Stable Anodes

Salazar‐Gastélum¹,

Reynoso‐Soto²,

Lin³

et al. 2013

JEP

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“…• More persulfate ions mean an increment on the ionic strength of the solution, Huang et al (2002) reported an inversely relationship of ionic strength with kinetic rate constant.…”

Section: Effect Of the Concentration And Type Of Oxidizing Agent (Sodmentioning

confidence: 98%

“…• At a higher concentration of oxidant, it is possible that other side reactions are favored, as the sulfate radical formation from persulfate ion involves reactions where other species are generated (Huang et al 2002 ), that do not promote the degradation of NB. • More persulfate ions mean an increment on the ionic strength of the solution, Huang et al (2002) reported an inversely relationship of ionic strength with kinetic rate constant.…”

Section: Effect Of the Concentration And Type Of Oxidizing Agent (Sodmentioning

confidence: 99%

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Photochemical Degradation of Nitrobenzene by S2o8–2 Ions and Uv Radiation

Pérez‐Sicairos

Hernández‐Calderón

Salazar‐Gastélum

et al. 2016

Rev. Int. Contam. Ambie.

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In this work nitrobenzene (NB) degradation was studied through an advanced oxidation process (AOP) by using a photochemical reactor and two kinds of oxidizing reagent: potassium persulfate (K 2 S 2 O 8 ) and sodium persulfate (Na 2 S 2 O 8 ), to promote generation of HO• radicals. It was determined the effect of different parameters on nitrobenzene degradation, such as: wavelength of UV lamps, concentration of oxidizing reagent, type of oxidizing reagent and number of UV lamps in the reactor. By using UV lamps with radiation wavelength of 254 nm, NB degradation reached almost 100 % meanwhile, irradiating at 350 nm resulted in < 35 % degradation. For experiments using UV lamps of 254 nm, the reaction rate increased with the radiant energy, being higher by using four UV lamps than two UV lamps for a reaction time of 60 min. The specific energy consumption for two UV lamps showed the lowest value being of 2626.0 KW.h/Kg of NB degraded.Palabras clave: remediación de agua, catálisis homogénea, agente oxidante, persulfato, oxidación avanzada RESUMEN En este trabajo se estudió la degradación de nitrobenceno (NB) mediante un proceso de oxidación avanzada empleando un reactor fotoquímico y dos agentes oxidantes: persulfato de potasio (K 2 S 2 O 8 ) y persulfato de sodio (Na 2 S 2 O 8 ), con el objetivo de generar radicales HO• . Se determinó el efecto de diferentes parámetros en la degradación de nitrobenceno, tales como: longitud de onda de la lámparas UV, concentración del agente oxidante, tipo de agente oxidante y número de lámparas en el reactor. Con la lámpara de 254 nm se alcanzó una remoción de NB cercana al 100 % mientras que con la lámpara de 350 nm se obtuvo un porcentaje de degradación < 35 %. Para el caso de las lámparas de 254 nm se encontró que la tasa de degradación se incrementa con la energía radiante, es decir, aumenta al emplear cuatro lámparas respecto de utilizar dos para un tiempo de reacción de 60 min. Al considerar el consumo energético específico, con el arreglo de dos lámparas UV se tiene el menor valor, siendo de 2626.0 KW/h/kg de NB degradado.

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“…Recently, persulfate (PS, S2O8 2-) with a redox potential equal to 2.01 V [1], attracts high attention due to its easy storage and transport, high stability, high aqueous solubility, and comparatively low cost [2][3]. Extensive research works have been held on the activation of PS under: interaction of heat [4][5], base activation [6], ultraviolet (UV) light (sensitive wavelength 220-310 nm) [7][8][9][10] activation, ultrasound activation [11], and transition metals activation [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Degradation of Acid Orange 7 in Aqueous Solution Under Presence of Iron(iii), Persulphate and Visible Light Irradiation

Zhong

Zhao

et al. 2017

IVUZKKT

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Kinetics of heat-assisted persulfate oxidation of methyl tert-butyl ether (MTBE)

Cited by 523 publications

References 23 publications

Electrochemical and Photoelectrochemical Decoloration of Amaranth Dye Azo Using Composited Dimensional Stable Anodes

Electrochemical and Photoelectrochemical Decoloration of Amaranth Dye Azo Using Composited Dimensional Stable Anodes

Photochemical Degradation of Nitrobenzene by S2o8–2 Ions and Uv Radiation

Degradation of Acid Orange 7 in Aqueous Solution Under Presence of Iron(iii), Persulphate and Visible Light Irradiation

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