Heterogeneous photocatalytic degradation of diuron on zinc oxide: Influence of surface-dependent adsorption on kinetics, degradation pathway, and toxicity of intermediates

Meephon, Sutaporn; Rungrotmongkol, Thanyada; Puttamat, Somchintana; Praserthdam, Supareak; Pavarajarn, Varong

doi:10.1016/j.jes.2019.04.016

Cited by 44 publications

(21 citation statements)

References 49 publications

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“…However, there was no significant change with the addition of ammonium oxalate (hole scavenger) and t‐butanol (

{OH}^{∙}

scavenger). The redox potential of O 2 /

O_{2}^{∙ -}

is −0.33 V (Meephon, Rungrotmongkol, Puttamat, Praserthdam, & Pavarajarn, 2019), which is more positive than the ZnO conduction band potential (−0.64 V). This means that the

O_{2}^{∙ -}

radical was easily produced by adsorbed oxygen using the electrons of the ZnO conduction band.…”

Section: Resultsmentioning

confidence: 99%

Optimization of photocatalytic degradation of rhodamine B using Box–Behnken experimental design: Mineralization and mechanism

Madjene

Assassi

Chokri

et al. 2020

Water Environment Research

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The aim of this work was to optimize the photocatalytic degradation of rhodamine B (RhB) using a four-factor Box-Behnken experimental design, and the study was carried out under artificial irradiation (24-W UV lamp) using ZnO in suspension. The Box-Behnken model has been validated with an error less than 5%. A total (100%) RhB removal and COD abatement rates were reached under optimal conditions of treatment time, ZnO dose, and stirring speed at different concentrations of dye. The study of the effect of irradiation type (solar and UV lamp) on the degradation of RhB showed that solar irradiation gave a better rate of degradation with complete discoloration after 2 hr. The study of RhB degradation mechanism indicates that O •− 2 were the main active species for the degradation of this pollutant. The comparison between the degradation of RhB alone and RhB prepared with varnish (as it is usually used in industry) revealed that degradation of RhB alone is faster comparing than that of RhB/varnish mixture. The results showed that the biodegradability was improved after a contact time of 60 min with a BOD 5 /COD ratio increasing from 0.23 to 0.90. © 2020 Water Environment Federation • Practitioner points • Optimization of the photocatalytic degradation of rhodamine B using a four-factor Box-Behnken experimental design. • Investigation of dye mineralization. • The degradation mechanism of rhodamine. • Biodegradability assessment based on the BOD 5 /COD ratio.

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“…However, there was no significant change with the addition of ammonium oxalate (hole scavenger) and t‐butanol (

{OH}^{∙}

scavenger). The redox potential of O 2 /

O_{2}^{∙ -}

is −0.33 V (Meephon, Rungrotmongkol, Puttamat, Praserthdam, & Pavarajarn, 2019), which is more positive than the ZnO conduction band potential (−0.64 V). This means that the

O_{2}^{∙ -}

radical was easily produced by adsorbed oxygen using the electrons of the ZnO conduction band.…”

Section: Resultsmentioning

confidence: 99%

Optimization of photocatalytic degradation of rhodamine B using Box–Behnken experimental design: Mineralization and mechanism

Madjene

Assassi

Chokri

et al. 2020

Water Environment Research

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“…Photocatalysis is a clean green chemical process and low‐temperature technique that has gained a huge recognition for treating wastewater (Ta et al ., 2019). Photocatalysis has a great potential to completely degrade lethal organic compounds in wastewater into harmless and safe compounds such as carbon dioxide and water (Meephon et al ., 2019). The photocatalytic process operates under mild conditions and can be powered by sunlight.…”

Section: Photocatalysis Technique For the Treatment Wastewatermentioning

confidence: 99%

Photocatalysis of xenobiotic organic compounds in greywater using zinc oxide nanoparticles: a critical review

Yashni

Al‐Gheethi

Hossain

et al. 2020

Water & Environment J

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The direct discharge of raw bathroom greywater has increased the concentrations of various pollutants in the water bodies. Typically, greywater contains large quantities of xenobiotic organic compounds (XOCs) owing to an increase in consumption of personal care and bath products. Therefore, it urges for a suitable technology to eliminate these compounds from contaminated waters. Photocatalytic degradation using Zinc Oxide nanoparticles (ZnO NPs) has the potentiality to eliminate various XOCs. However, ZnO NPs have high tendency to aggregate, which may lower the photocatalytic degradation rate. Therefore, there is an urgency to modify ZnO NPs to overcome the limitation. The present review was conducted to determine a suitable method for the modification ZnO NPs. Besides, the potential of the modified ZnO NPs in degrading XOCs in greywater as a photocatalyst was also discussed.

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“…These three isotherms are concave, which demonstrates that the CNC/CTM nanocomposite adsorbent is benecial for DUR removal. 57 The isotherm curvature signies that as the solute concentration increases, the active sites of the adsorbent are gradually lled with solute molecules, and it is difficult for the solute to nd an effective adsorption site on the adsorbent. In the DUR adsorption isotherm, there is no complete plateau, i.e., there are still adsorption sites that are not lled with solute molecules during the adsorption process, which is consistent with the results reported in the literature.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Nanocellulose–organic montmorillonite nanocomposite adsorbent for diuron removal from aqueous solution: optimization using response surface methodology

Yang

et al. 2020

RSC Adv.

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Heterogeneous photocatalytic degradation of diuron on zinc oxide: Influence of surface-dependent adsorption on kinetics, degradation pathway, and toxicity of intermediates

Cited by 44 publications

References 49 publications

Optimization of photocatalytic degradation of rhodamine B using Box–Behnken experimental design: Mineralization and mechanism

Optimization of photocatalytic degradation of rhodamine B using Box–Behnken experimental design: Mineralization and mechanism

Photocatalysis of xenobiotic organic compounds in greywater using zinc oxide nanoparticles: a critical review

Nanocellulose–organic montmorillonite nanocomposite adsorbent for diuron removal from aqueous solution: optimization using response surface methodology

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