Experimental and numerical study of methylparaben decomposition in aqueous solution using the UV/H<sub>2</sub>O<sub>2</sub> process

Nguyen, Viet-Dung; Pierens, Xavier; Benhabib, Karim

doi:10.1080/03601234.2019.1571365

Cited by 10 publications

(3 citation statements)

References 41 publications

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“…Type III ketones are mainly derived from terrestrial plants, which are rich in oxygen, less hydrogen, more polycyclic aromatic hydrocarbons, and less straightchain structure (Mullakaev et al 2017). Compared with the other two, this ketone has a lower ability to produce oil, but has a strong growth ability and is the main source of shale gas (Nguyen et al 2019). Most type I and type II ketones produce liquid hydrocarbons, but the liquid hydrocarbons produced will generate a lot of gas after decomposition.…”

Section: Types Of Organic Mattermentioning

confidence: 99%

RETRACTED ARTICLE: Coastline geological parameters and beach motion image simulation based on particle swarm optimization

Zou

2021

Arab J Geosci

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This paper uses the function of neural network-based nonlinear mapping and particle group optimization algorithm to optimize the system, and then uses the particle group optimization algorithm of inertia weight, so as to achieve the goal of optimizing the weight of neural network training. By choosing to encode the geological parameters of the coastline with mpeg-4 and obtain the relevant data, the relevant data of the beach motion image can be obtained, so that the simulation experiment can be carried out. This paper introduces the process of establishing a multi-modal pore size distribution fitting model based on probability density function, and conducts an experimental analysis on the geological parameters and pore structure of two typical shale storage layer samples in China. Finally, the multi-peak opening distribution fitting model and the pore size distribution are obtained through quantitative fitting curves, and the geological parameters of the marine continental shale that affect the pore size distribution are investigated, and the pore size distribution of the shale and the geology of the shale are investigated. In-depth parameter analysis is to explore the thermal maturity of organic matter, and the relationship between its content and mineral composition. In addition, the coastal image simulation is researched focusing on the characteristics of coastal beach recreational sports, the problems existing in the development process, and future development countermeasures. Finally, it is pointed out that the future development trend of coastal beach leisure sports, through the integration of local leisure sports-related characteristics and professional development, so as to achieve the implantation of culture in sports, and the organic combination of the two promotes the economic and ecological environment.

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Section: Types Of Organic Mattermentioning

confidence: 99%

RETRACTED ARTICLE: Coastline geological parameters and beach motion image simulation based on particle swarm optimization

Zou

2021

Arab J Geosci

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“…Currently, it is appropriate investigating alternative treatments to biological ones for decomposing DCF in waters. To address this challenge, Advanced oxidation processes (AOPs) arise due to their high efficiency in degrading a wide variety of recalcitrant organic compounds (Capodaglio et al 2018;Leyva et al 2018), where irradiation with ultraviolet light stands out and its combination with hydrogen peroxide (Nguyen et al 2019;Dhawle et al 2021;Lei et al 2021;Graumans et al 2021). Studies reported by Sohn et al (2024) demonstrate that the UV/H2O2 process is highly effective in removing many emerging micropollutants detected in drinking water treatment plants.…”

Section: Introductionmentioning

confidence: 99%

Kinetic modelling of aromaticity and water colour changes during diclofenac oxidation by UV/H2O2

Villota,

Echevarria,

De Luis

2024

Preprint

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Diclofenac (DCF) is degraded by UV/H2O2 following first-order kinetics to highly aromatic species, while generating an intense yellow tint in the water. During the oxidation, turbidity remains under 1 NTU. The formation of aromatic intermediates has been modelled considering a first-order series reaction system, where DCF degrades to aromatic species (anilines and phenols), according to a kinetic constant kDCF,254=0.3 (1/min), until the maximum concentration of aromatic compounds \({\text{[}{\text{A}}_{\text{254}}\text{]}}_{\text{max }}\text{=0.2116 }{\text{[}{\text{H}}_{\text{2}}{\text{O}}_{\text{2}}\text{]}}_{\text{0}}^{\text{0.6}}\text{ – 0.9327 }{\text{[}{\text{H}}_{\text{2}}{\text{O}}_{\text{2}}\text{]}}_{\text{0 }}^{\text{0.3}}\text{+ 3.3602}\). The aromaticity then decreases, following kArom (1/min), as carboxylic acids (acetic, formic) and inorganic ions (CO2, NO3−, Cl−) are created. The evolution of colour presents the kinetics of a reaction intermediate following first-order kinetics, where DCF degrades to coloured intermediates (quinone-like compounds), in agreement with kDCF,455=0.2 (1/min), until reaching a maximum intensity \({\text{[Colour]}}_{\text{max }}\text{=0.0043 }{\text{[}{\text{H}}_{\text{2}}{\text{O}}_{\text{2}}\text{]}}_{\text{0}}^{}\text{ - 0.0538 }{\text{[}{\text{H}}_{\text{2}}{\text{O}}_{\text{2}}\text{]}}_{\text{0 }}^{\text{0.5}}\text{+ 0.2758. }\) After, tint diminishes following a kinetic constant kColour (1/min). Conducting with ratios over 1 mol DCF : 6 mol H2O2, waters with colourless appearance, low aromaticity and DCF degradation output >95% are attained. Both aromaticity and colour elimination rates increase with the oxidant concentration, reaching their maximum kArom=0.08 (1/min) and kColour=0.14 (1/min) when using 1 mol DCF : 150 mol H2O2. When performing with higher molar ratios, the kinetic constants slow down, due to the self-decomposition of H2O2 that acts as a HO• scavenger agent.

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“…Many of these pollutants are recalcitrant and they cannot be biologically degraded; therefore, advanced oxidation processes (AOP) are necessary in order to mineralize these water contaminants and thus clean polluted water. One such powerful AOP is a combination of UV radiation with H 2 O 2 (UV/H 2 O 2 ) [1][2][3][4][5][6][7][8][9][10]. UV radiation may photolyze the organic substance by itself; however, UV most effectively dissociates H 2 O 2 leading to the formation of highly oxidative radicals which interact with organic pollutants and mineralize them.…”

Section: Introductionmentioning

confidence: 99%

UV/H2O2 degradation of diclofenac in a photocatalytic fuel cell

Dhawle

Mantzavinos

Lianos

2021

Applied Catalysis B: Environmental

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The purpose of this work was to construct an integrated reactor which could photoelectrocatalytically generate hydrogen peroxide under solar radiation and simultaneously degrade a recalcitrant pollutant by the UV/H 2 O 2 process. Diclofenac has been chosen as water soluble model pollutant. Hydrogen peroxide has been produced by atmospheric oxygen reduction in a photocatalytic fuel cell. The cell comprised a transparent photoanode electrode bearing a combined CdS/TiO 2 photocatalyst and a carbon cloth cathode bearing nanoparticulate carbon without any other electrocatalyst. Diclofenac was dissolved in the cathode compartment where hydrogen peroxide was generated and the pollutant was degraded by UV radiation support. Degradation was monitored by UV-Vis spectrophotometry and by high performance liquid chromatography. The results show that an integrated reactor functionality is realistic and effective and it provides an alternative route for sustainable operation aiming at environmental remediation.

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Experimental and numerical study of methylparaben decomposition in aqueous solution using the UV/H₂O₂ process

Cited by 10 publications

References 41 publications

RETRACTED ARTICLE: Coastline geological parameters and beach motion image simulation based on particle swarm optimization

RETRACTED ARTICLE: Coastline geological parameters and beach motion image simulation based on particle swarm optimization

Kinetic modelling of aromaticity and water colour changes during diclofenac oxidation by UV/H2O2

UV/H2O2 degradation of diclofenac in a photocatalytic fuel cell

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Experimental and numerical study of methylparaben decomposition in aqueous solution using the UV/H2O2 process

Cited by 10 publications

References 41 publications

RETRACTED ARTICLE: Coastline geological parameters and beach motion image simulation based on particle swarm optimization

RETRACTED ARTICLE: Coastline geological parameters and beach motion image simulation based on particle swarm optimization

Kinetic modelling of aromaticity and water colour changes during diclofenac oxidation by UV/H2O2

UV/H2O2 degradation of diclofenac in a photocatalytic fuel cell

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Experimental and numerical study of methylparaben decomposition in aqueous solution using the UV/H₂O₂ process