Photocatalytic degradation of organic contaminants in water

Oh, Youn-Chul

doi:10.31274/rtd-180813-10983

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…Among the advanced oxidation processes used in water and wastewater treatment, photocatalysis, as a green chemical pathway, plays an important role as it is capable of degrading and mineralizing contaminants such as dyes, phenols and pesticides into harmless products under mild conditions (Ike et al 2002;Oh 2004;Wang et al 2009;De la Fuente et al 2010;Ameta et al 2012;Rammohan and Nadagouda 2013;Umar and Aziz 2013;Pirilä et al 2015;Liang et al 2020). This process involves chemical reactions that take place in the presence of light and a photocatalyst.…”

Section: Photocatalyst Nanoparticles For the Degradation Of Alkylphen...mentioning

confidence: 99%

Innovative technologies to remove alkylphenols from wastewater: a review

et al. 2022

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Alkylphenols and alkylphenol polyethoxylates are emerging hazardous contaminants due in particular to their endocrine-disrupting properties. These compounds originate from consumer products such as paints and latex paints, adhesives, inks, formulation of pesticides, paper industry, textile and leather industry, petroleum recovery chemicals, metal working fluids, personal care products, washing agents, cleaners, and detergents. Since classical wastewater treatments have not been designed to remove alkylphenols, these compounds end up polluting ecosystems. Here we review three advanced methods to remove alkylphenols and derivatives. First, innovative polymers, such as cyclodextrin polymers and molecularly imprinted polymers, allow to remove alkylphenols from effluents by adsorption. Second, biotechnologies such as microalgae, biodeg-radation in constructed wetlands and sequential anaerobic-aerobic digestion treatments. Third, advanced oxidation processes to degrade recalcitrant alkylphenols, e.g., ozone-carbon coupling, electrochemical degradation, photocatalysis, zero-valent iron-activated persulfate coupling, and catalytic ozonation.

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Section: Photocatalyst Nanoparticles For the Degradation Of Alkylphen...mentioning

confidence: 99%

Innovative technologies to remove alkylphenols from wastewater: a review

et al. 2022

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“…It has been suggested that preliminary adsorption is a prerequisite for highly efficient photocatalytic. Because recombination of the photogenerated electron and hole is so rapid, interfacial electron transfer is kinetically competitive only when the relevant donor or acceptor is preadsorbed before photolysis [28]. This process was followed for a time of 90 min with the experimental conditions: [MG] = 5x10 -5 g/mol, V = 110 ml and the measured spectra are represented in Fig.…”

Section: 𝛼 ℎ𝜈 = 𝐴 √ ℎ𝜈 − 𝐸 𝑔mentioning

confidence: 99%

UV-Induced Photocatalytic Degradation of Methyl Green Dye by ZnO Nanowires and Nanorods Obtained by Spray Pyrolysis

Hadjeris

Herissi

2022

NHC

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ZnO nanorods and ZnO nanowires were obtained using solutions of zinc chloride and zinc acetate dihydrate, respectively, as precursors. The thin films were deposited by ultrasonic spray pyrolysis onto glass substrates at 350 °C and their morphological, structural, and optical properties were investigated. ZnO nanostructures morphologies were observed by SEM and images showed that a large amount of ZnO nanorods and nanowires were deposited onto the full substrates surfaces. The films have polycrystalline nature and hexagonal wurtzite structure with (002) and (101) preferential orientations for ZnO nanorods and nanowires, respectively. The crystallite size was found to be in the range of 30 nm. The films exhibit an optical transparency in the visible region of about 60 % for ZnO nanowires and 30 % for ZnO nanorods. The different ZnO films were used as photocatalysts to study the photodegradation of methyl green dye induced by UV light. ZnO nanorods exhibited higher photodegradation efficiency and a larger rate constant than ZnO nanowires leading to an improvement from 60 % to 80 % of the degradability of the dye.

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Advanced Treatments for the Removal of Alkylphenols and Alkylphenol Polyethoxylates from Wastewater

Crini

Cosentino

Bradu

et al. 2021

Environmental Chemistry for a Sustainable World

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Since the 2000s, among organic contaminants, alkylphenols and alkylphenol polyethoxylates have been listed as hazardous substances by several national, European and international agencies because they are considered endocrine disruptors. Among the molecules classified as priority substances in terms for monitoring and action, nonylphenols and octylphenols and their polyethoxylated derivatives receive particular attention, especially in developing countries. Effluents from treatments plants are considered to be the largest source of alkylphenols in the environment. Although legislation concerning their use has become increasingly strict, these substances are still found in the environment, especially in water resources.The existing water and wastewater treatment plants have not been designated for these emerging contaminants. Conventional treatments such as biodegradation, sand filtration, carbon adsorption and/or chemical oxidation in place are not effective in their elimination removal. No appropriate methods have been developed to deal them at the urban or industrial scale. Thus, alkylphenols have become a relevant research topic for scientists interested in water engineering issues related to

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Photocatalytic degradation of organic contaminants in water

Cited by 4 publications

References 7 publications

Innovative technologies to remove alkylphenols from wastewater: a review

Innovative technologies to remove alkylphenols from wastewater: a review

UV-Induced Photocatalytic Degradation of Methyl Green Dye by ZnO Nanowires and Nanorods Obtained by Spray Pyrolysis

Advanced Treatments for the Removal of Alkylphenols and Alkylphenol Polyethoxylates from Wastewater

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