Comparative study on the sonophotocatalytic degradation of hazardous waste

Talebian, Nasrin; Nilforoushan, Mohammad Reza; Mogaddas, Fatemeh Jazaeri

doi:10.1016/j.ceramint.2012.11.085

Cited by 45 publications

(29 citation statements)

References 62 publications

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“…However pH 5, only demonstrated rate constant 0.010 min -1 and 50.0% of degradation efficiency. This result was parallel with an articles reported by Talebian et al [7] and Cho and Zoh [9] which stated that photocatalytic and sonophotocatalytic activities reached a maximum in acidic conditions due to the strong pH dependence of the charged state of semiconductor, TiO 2 . This result can be explained by the point of zero charge (pHpsz) of the TiO 2 which is at pH 6.8.…”

Section: Resultssupporting

confidence: 81%

“…3 (b) showed significant difference of degradation rate between photocatalysis and sonophotocatalysis systems although they illustrated the similar trend. This result is in good agreement with reported in Talebian et al [7]. In addition, the synergetic effect will be produced in combination of sonolysis and photocatalysis (sonophotocatalysis) for all the substrate concentration.…”

Section: Effect Of Initial Dye Concentrationssupporting

confidence: 82%

“…The increasing in degradation efficiency with increasing of catalyst loading in this reaction due to an increase in the available surface area or active site of the catalyst. Therefore, more OH would be generated when catalyst loading was increased [7,[10][11]. In addition, coefficient of determination (R 2 ) range (0.9635 -0.9953) for this figure indicates good correlation with the linear pattern.…”

Section: Effect Of Catalyst Loadingmentioning

confidence: 83%

“…One of the main mechanisms for the enhancement of sonophotocatalytic degradation is the use of ultrasound which creates the conditions of increased turbulence mixing in the liquid-solid systems. Thus, the mass transfer limitations will improve and the surface area available will increase due to the catalyst fragmentation and de-agglomeration [7,12]. During ultrasonic irradiation of liquid-powder slurries, created cavitation can accelerate solid particles to high velocities.…”

Section: Photocatalytic and Sonophotocatalytic Degradations Of Rr120mentioning

confidence: 99%

“…Ultrasound irradiation results in acoustic cavitation and bubble collapse cause intense local heating, high pressure and short lifetime; these transient, localized hot spots lead to high energy chemical reactions. Thus, organic compounds are highly degraded and inorganic compounds can be oxidized in this type of technique [2,7]. Although many significant research of degradation and oxidation of the compounds have been conducted using this technique, the exact mechanism has yet to be explored [8].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Sonophotocatalytic degradation of Reactive Red 120 (RR120) in the presence of TiO2: Kinetic study

Fadzeelah

Fadzri

2016

AIP Conference Proceedings

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Photo-, sono-and sonophotocatalytic degradation of methylene blue using Abstract. This paper is reporting the sonophotocatalytic degradation of Reactive Red 120 (RR120) under UV light and in the presence of TiO 2 enhanced by ultrasonic irradiation. The result then was compared with photocatalytic degradation. The effects of pH, catalyst loading and initial dye concentration on the degradation rate were studied. In this study, degradation experiments were performed using photoreactor system which comprised a batch photoreactor, UV lamp and ultrasonic mist probe. The probe was used in order to introduce the effect of ultrasonic irradiation in the photoreactor system. The degradation efficiencies of sonophotocatalysis system were obviously depend to the parameter conditions such as pH, catalyst loading and initial dye concentration. Meanwhile, the ultrasonic irradiation in the sonophotocatalysis system enhanced the degradation rate but not changed its trend. Besides, this system exhibited higher rate constant and degradation efficiency compared to photocatalysis system due to an increase in the available surface area or active site of the catalyst and decreasing of mass transfer limitations.

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Section: Resultssupporting

confidence: 81%

Section: Effect Of Initial Dye Concentrationssupporting

confidence: 82%

Section: Effect Of Catalyst Loadingmentioning

confidence: 83%

Section: Photocatalytic and Sonophotocatalytic Degradations Of Rr120mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Sonophotocatalytic degradation of Reactive Red 120 (RR120) in the presence of TiO2: Kinetic study

Fadzeelah

Fadzri

2016

AIP Conference Proceedings

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Sonophotocatalytic Degradation of Pollutants by ZnO‐Based Catalysts: A Review

Asli

Taghizadeh

2020

ChemistrySelect

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Sonophotocatalyticprocess (SPC) is the simultaneous use of ultraviolet radiation (UV), ultrasonic radiation (US), and semiconductor materials as photocatalysts and sonocatalysts for the generation of reactive oxygen species (ROS). These free radicals oxidize several pollutant molecules in various industrial wastewaters. The objective of this review was to compare the papers published on the sonophotocatalytic degradation of different pollutants in the presence of zinc oxide-based particles. The elimination rate of contaminants in this process was compared with individual methods such as sonocatalysis and photo-catalysis. The experimental conditions, including the catalyst dosage, the pollutant concentration, the radiation power, the applied frequency, the initial pH, and the reaction time were further investigated. ZnO nanoparticles are well-known as semiconductor materials with good sonophotocatalytic activity. In general, sonophotocatalysis is emerging as one of the most efficient treatment techniques for degrading the recalcitrant pollutants in the aqueous medium. It is expected that these technologies result in more progressive research with the most degradation efficiency.

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Semiconductor Catalyst: Investigation for the Degradation of BB9 Azo Dye by Sonophotocatalytic Process

Ertugay,

Acar

2024

ChemistrySelect

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The degradability of an azo dye, Basic Blue 9 (BB9), by heterogeneous sonocatalytic, photocatalytic, and sonophotocatalytic oxidation process was examined using simultaneous irradiation of UV‐C at 254 nm and power ultrasound at 20 kHz accompanied with a heterogeneous catalyst zinc oxide (ZnO) in the study. The effect of ZnO dose and initial dye concentration was investigated on the dye degradation in sonocatalytic, photocatalytic, and sonophotocatalytic processes at pH 5.5 (natural pH). The results obtained from the experimental studies were evaluated with the parameters of color removal, pseudo‐first‐order rate constant, and half‐life time. It was observed that the degradation of BB9 dye by the sonophotocatalytic process was higher compared to both sonocatalytic and photocatalytic degradation. as follows: 97.46, 48.64 and 56.88 %. The combination of sono and photocatalytic showed a remarkable synergistic effect in BB9 degradation. The kinetics of sonophotocatalytic oxidations, depending on the initial BB9 dye concentration, were found to follow the Langmuir‐Hinshelwood model. In addition, the effect of ZnO on the sonophotocatalytic oxidation process was higher compared to titanium dioxide and zero‐valent iron as follows: 97.47, 80.77 and 80.62 %.

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Comparative study on the sonophotocatalytic degradation of hazardous waste

Cited by 45 publications

References 62 publications

Sonophotocatalytic degradation of Reactive Red 120 (RR120) in the presence of TiO2: Kinetic study

Sonophotocatalytic degradation of Reactive Red 120 (RR120) in the presence of TiO2: Kinetic study

Sonophotocatalytic Degradation of Pollutants by ZnO‐Based Catalysts: A Review

Semiconductor Catalyst: Investigation for the Degradation of BB9 Azo Dye by Sonophotocatalytic Process

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