Titanium dioxide mediated solar photocatalytic degradation of thiram in aqueous solution: Kinetics and mineralization

Kaneco, Satoshi; Li, Ning; Itoh, Kumiko; Katsumata, Hideyuki; Suzuki, Tohru; Ohta, Kouji

doi:10.1016/j.cej.2008.07.029

Cited by 55 publications

(31 citation statements)

References 23 publications

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“…It has been indicated that the build-up of electronehole pairs within the photocatalyst is smaller than the oxidizable organic substrate concentration and hence a linear rate law was observed at low fluxes whereas the photocatalytic degradation efficiency was shown to be limited to the electronehole recombination which is predominant at flux above 10 16 photon s À1 cm À2 . Kaneco et al (2009) investigated the effect of irradiance on the solar photocatalytic destruction of thiram with various light intensities on sunny and cloudy days. The degradation efficiency increased rapidly with increase in the light intensity up to 0.4 mW/cm 2 , and above the intensity the efficiency increased gradually.…”

Section: Light Intensity and Wavelengthmentioning

confidence: 99%

Influence of parameters on the heterogeneous photocatalytic degradation of pesticides and phenolic contaminants in wastewater: A short review

Ahmed

Rasul

Brown

et al. 2011

Journal of Environmental Management

750

316

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In recent years, the application of heterogeneous photocatalytic water purification processes has gained wide attention due to its effectiveness in degrading and mineralizing the recalcitrant organic compounds as well as the possibility of utilizing the solar UV and visible-light spectrum. This paper aims to review and summarize the recent works on the titanium dioxide (TiO(2)) photocatalytic oxidation of pesticides and phenolic compounds, predominant in storm and wastewater effluents. The effects of various operating parameters on the photocatalytic degradation of pesticides and phenols are discussed. Results reported here suggest that the photocatalytic degradation of organic compounds depends on the type and composition of the photocatalyst and, light intensity, initial substrate concentration, amount of catalyst, pH of the reaction medium, ionic components in water, solvent types, oxidizing agents/electron acceptors, catalyst application mode, and calcination temperature in the water environment. A substantial amount of research has focused on the enhancement of TiO(2) photocatalysis by modification with metal, non-metal and ion doping. Recent developments in TiO(2) photocatalysis for the degradation of various pesticides and phenols are also highlighted in this review. It is evident from the literature survey that photocatalysis has good potential to remove a variety of organic pollutants. However, there is still a need to determine the practical utility of this technique on a commercial scale.

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Section: Light Intensity and Wavelengthmentioning

confidence: 99%

Influence of parameters on the heterogeneous photocatalytic degradation of pesticides and phenolic contaminants in wastewater: A short review

Ahmed

Rasul

Brown

et al. 2011

Journal of Environmental Management

750

316

View full text Add to dashboard Cite

show abstract

“…Semiconductor photocatalysis has received increased attention due to its inherent ability to lead to complete mineralisation of organic carbon into carbon dioxide and water (Erquez & Pichat, 2006;Kaneco, Itoh, Katsumata, Suzuki, & Ohta, 2009;Kaniou, Pitarakis, Barlagianni, & Poulios, 2009;Pera-Titus, García-Molina, Baños, Giménez, & Esplugas, 2004;Rao, Sivasankar, & Sadasivam, 2005;Uddin, Hasnat, Samed, & Majumdar, 2007) without a mass transfer. Moreover, this process can be performed under ambient conditions using atmospheric oxygen as the oxidant (Chatterjee & Dasgupta, 2005).…”

Section: Introductionmentioning

confidence: 99%

Photodegradation of Chlorophenoxyacetic Acids by ZnO/r-Fe2O3 Nanocatalysts: A Comparative Study

Abdullah¹,

Mun²,

Zainal³

et al. 2013

IJC

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ZnO/γ-Fe 2 O 3 nanocomposite was synthesized via simple precipitation. The synthesized nanocatalysts underwent heat treatment at 450 o C for an hour. The characteristics of the nanocomposite were investigated by XRD, TEM, and BET surface area measurement. Zeta potential analysis was used to examine the surface charge properties of the nanocatalysts. The synthesized nanocomposite has an average particle size of 11 nm and a surface area of 20 m 2 g -1 . The potential of ZnO/γ-Fe 2 O 3 as a photocatalyst was evaluated by photodegrading chlorophenoxyacetic acids (PAA, 2,4-D, 2,4,5-T and 4CA). The decomposition of chlorophenoxyacetic acids by ZnO/γ-Fe 2 O 3 followed 4CA > 2,4,5-T ≈ 2,4-D > PAA. The result indicates the applicability of ZnO/γ-Fe 2 O 3 nanocomposite as a photocatalyst in removing organic pollutants in wastewater.

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“…Furthermore, it increases with TiO 2 dosage, due to the rise in the number of active sites accessible for the photocatalytic reaction. However, for TiO 2 concentrations above 12.5 mM the increase in • OH generation is less pronounced because the catalyst excess can lead to an increase in the opacity of the suspension and a decrease in light penetration [33,34]. This trend is satisfactorily represented (Fig.…”

Section: Catalyst Dosage Influencementioning

confidence: 79%

Influence of radiation and TiO2 concentration on the hydroxyl radicals generation in a photocatalytic LED reactor. Application to dodecylbenzenesulfonate degradation

Dominguez

Ribao

Rivero

et al. 2015

Applied Catalysis B: Environmental

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a b s t r a c tOne of the main issues associated to the development of photocatalysis is the lack of adequate indexes that allow the comparison of the results obtained in different experimental setup designs. The hydroxyl radicals ( • OH) generation rate is a key factor to determine the overall oxidation rate.In this work, using a Light Emitting Diodes (LEDs) reactor aimed to maximize light efficiency and minimize energy consumption, the • OH generated have been determined as a function of the radiation and catalyst concentration following an indirect method based on the reaction between • OH and dimethyl sulfoxide (DMSO) to produce formaldehyde.Finally, the methodology has been applied to analyze the degradation kinetics of the anionic surfactant dodecylbenzenesulfonate (DBS), frequently used in shampoo formulations and detergents for washing machines. We propose a method based on the indirect determination of • OH radicals generation rate that allows the assessment and comparison of the kinetics of photocatalytic oxidation of pollutants.

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Titanium dioxide mediated solar photocatalytic degradation of thiram in aqueous solution: Kinetics and mineralization

Cited by 55 publications

References 23 publications

Influence of parameters on the heterogeneous photocatalytic degradation of pesticides and phenolic contaminants in wastewater: A short review

Influence of parameters on the heterogeneous photocatalytic degradation of pesticides and phenolic contaminants in wastewater: A short review

Photodegradation of Chlorophenoxyacetic Acids by ZnO/r-Fe2O3 Nanocatalysts: A Comparative Study

Influence of radiation and TiO2 concentration on the hydroxyl radicals generation in a photocatalytic LED reactor. Application to dodecylbenzenesulfonate degradation

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