Titanium(IV) Oxide Modified with Activated Carbon and Ultrasounds for Caffeine Photodegradation: Adsorption Isotherm and Kinetics Study

Zawadzki, Piotr; Kudlek, Edyta; Dudziak, Mariusz

doi:10.12911/22998993/126985

Cited by 4 publications

(8 citation statements)

References 13 publications

(13 reference statements)

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“…Mobility is necessary for the photocatalytic action of TiO 2 to be able to prolong its usefulness, as reported by Jiménez [2015]. TiO 2 can be combined with other elements to improve the photo degradation efficiency in specific applications [Zawadzki et al, 2020].…”

Section: Discussion and Conclusion On The Quality Of Water Obtainedmentioning

confidence: 97%

Gray Water Recovery System Model by Solar Photocatalysis with TiO<sub>2</sub> Nanoparticles for Crop Irrigation

Carbajal-Morán¹,

Quiñones²,

Camarena³

2021

J. Ecol. Eng.

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The objective of the study was to establish the configuration of the system model to allow the effective recovery of gray water by solar photocatalysis with TiO 2 nanoparticles for irrigation of crops. A programmable solar photoreactor based on an S7 1500 PLC and online measurement sensors were used as materials. The inductive method was used to analyze the samples and the deductive method to determine the water quality. The research design used was experimental based on the response surface methodology (MSR) with 20 experiments, 6 of which were central experiments and 6 were axial experiments; these experiments were carried out on sunny days. As a result of the research, a gray water recovery model was obtained, part of this being an electronic system with a programmable photocatalyst, which allowed the development of the experiments. It was concluded that with a solar UV index of 12.21, a dose of titanium dioxide (TiO 2 ) nanoparticles 1.973 g/L and with an exposure period of 60.041 minutes of the solar photocatalyst to UV radiation on sunny days, gray water was recovered in 90% with a confidence level of 95% and a significance α = 0.05, which translates into excellent quality according to the water quality index established in Peru (ICA-PE).

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Section: Discussion and Conclusion On The Quality Of Water Obtainedmentioning

confidence: 97%

Gray Water Recovery System Model by Solar Photocatalysis with TiO<sub>2</sub> Nanoparticles for Crop Irrigation

Carbajal-Morán¹,

Quiñones²,

Camarena³

2021

J. Ecol. Eng.

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“…The maximum wavelength of procion red solution is 470 nm. The degradation percentage of procion dye and the adsorption percentage formulas are shown in Equations ( 1) and (2).…”

Section: Zno-zeolite Nanocomposite Application For Photocatalytic Deg...mentioning

confidence: 99%

“…The photocatalytic oxidation process combines UV irradiation with a catalyst; TiO 2 , CdS, ZnO [2]. The photocatalytic reaction produces hydroxyl radicals as an oxidator to break down the pollutant gradually in a stepwise process [3].…”

Section: Introductionmentioning

confidence: 99%

ZnO-Zeolite nanocomposite application for photocatalytic degradation of procion red and its adsorption isotherm

et al. 2022

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In this paper, the photocatalytic degradation of procion red dye, one of the most frequently used dyes in the textile industry, was studied. The objective of the research is to study the ZnO-Zeolite nanocomposite application to degrade procion red dye by using different irradiation sources. The adsorption isotherm was also investigated. The ZnO-Zeolite nanocomposite was prepared by a sol-gel process. Photodegradation test was applied under the sunlight irradiation, ultraviolet (UV) lamp, and in a darkroom. The dye degradation was also examined by the synthetic zeolite and ZnO for a comparison. Another objective of this study is to analyse the appropriate adsorption isotherm to describe the degradation process of procion red dye by using ZnO-Zeolite nanocomposite. The adsorption ability of the nanocomposite was described by Langmuir and Freundlich isotherms. The adsorption of the nanocomposite was reported to depend on the degradation time. The highest photodegradation result of 98.24 % was achieved by irradiating 50 mg/l of procion red dye under the sunlight for 120 minutes. The result showed that the Langmuir adsorption isotherm was the appropriate adsorption equation for the degradation process of procion red dye by using ZnO-Zeolite nanocomposite with R2 value of 0.995.

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“…1 ). In recent years, researchers have focused on modifications of advanced oxidation processes (Cheng et al, 2019 ; Zawadzki et al, 2020 ; Zawadzki, 2020 ; Nguyen et al, 2020 ). Modifications simplify the way catalysts are activated, and increase the degree of pollutant removal efficiency with variable wastewater quality.…”

Section: Introductionmentioning

confidence: 99%

Visible Light–Driven Advanced Oxidation Processes to Remove Emerging Contaminants from Water and Wastewater: a Review

Zawadzki

2022

Water Air Soil Pollut

Self Cite

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The scientific data review shows that advanced oxidation processes based on the hydroxyl or sulfate radicals are of great interest among the currently conventional water and wastewater treatment methods. Different advanced treatment processes such as photocatalysis, Fenton’s reagent, ozonation, and persulfate-based processes were investigated to degrade contaminants of emerging concern (CECs) such as pesticides, personal care products, pharmaceuticals, disinfectants, dyes, and estrogenic substances. This article presents a general overview of visible light–driven advanced oxidation processes for the removal of chlorfenvinphos (organophosphorus insecticide), methylene blue (azo dye), and diclofenac (non-steroidal anti-inflammatory drug). The following visible light–driven treatment methods were reviewed: photocatalysis, sulfate radical oxidation, and photoelectrocatalysis. Visible light, among other sources of energy, is a renewable energy source and an excellent substitute for ultraviolet radiation used in advanced oxidation processes. It creates a high application potential for solar-assisted advanced oxidation processes in water and wastewater technology. Despite numerous publications of advanced oxidation processes (AOPs), more extensive research is needed to investigate the mechanisms of contaminant degradation in the presence of visible light. Therefore, this paper provides an important source of information on the degradation mechanism of emerging contaminants. An important aspect in the work is the analysis of process parameters affecting the degradation process. The initial concentration of CECs, pH, reaction time, and catalyst dosage are discussed and analyzed. Based on a comprehensive survey of previous studies, opportunities for applications of AOPs are presented, highlighting the need for further efforts to address dominant barriers to knowledge acquisition.

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Titanium(IV) Oxide Modified with Activated Carbon and Ultrasounds for Caffeine Photodegradation: Adsorption Isotherm and Kinetics Study

Cited by 4 publications

References 13 publications

Gray Water Recovery System Model by Solar Photocatalysis with TiO<sub>2</sub> Nanoparticles for Crop Irrigation

Gray Water Recovery System Model by Solar Photocatalysis with TiO<sub>2</sub> Nanoparticles for Crop Irrigation

ZnO-Zeolite nanocomposite application for photocatalytic degradation of procion red and its adsorption isotherm

Visible Light–Driven Advanced Oxidation Processes to Remove Emerging Contaminants from Water and Wastewater: a Review

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