Modeling the degradation and disinfection of water pollutants by photocatalysts and composites: A critical review

Ateia, Mohamed; Alalm, Mohamed Gar; Awfa, Dion; Johnson, Matthew S.; Yoshimura, Chihiro

doi:10.1016/j.scitotenv.2019.134197

Cited by 121 publications

(39 citation statements)

References 94 publications

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“…In addition to considerations related to reactor design, other challenges regard the role of the water matrix. Most studies report photocatalytic experiments on ideal lab conditions such as pure water solutions of a single pollutant at an easily quantifiable concentration (from few mg.L -1 to even max solubility) [63]. While rigorously controlled conditions are adopted for the sake of the characterization of novel photocatalysts, they are far from the real scenario.…”

Section: Photocatalytic Activity In Complex Water Matrices and Real Samplesmentioning

confidence: 99%

Towards Scaling-up Photocatalytic Process for Multiphase Environmental Applications: A Review

Mg¹,

Djellabi²,

Meroni³

et al. 2021

Preprint

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Recently, we have witnessed a booming development of composites and multi-dopant metal oxides to be employed as novel photocatalysts. Yet the practical application of photocatalysis for environmental purposes is still elusive. Concerns about the unknown fate and toxicity of nanoparticles, unsatisfactory performance in real conditions, mass transfer limitations and durability issues have so far discouraged investments in full-scale applications of photocatalysis. Herein, we provide a critical overview of the main challenges that are limiting large-scale application of photocatalysis in air and water/wastewater purification. We then discuss the main approaches reported in the literature to tackle these shortcomings, such as the design of photocatalytic reactors that retain the photocatalyst, the study of degradation of micropollutants in different water matrices, and the development of gas-phase reactors with optimized contact time and irradiation. Furthermore, we provide a critical analysis of research-practice gaps such as treatment of real water and air samples, degradation of pollutants with actual environmental concentrations, photocatalyst deactivation, and cost and environmental life-cycle assessment.

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Section: Photocatalytic Activity In Complex Water Matrices and Real Samplesmentioning

confidence: 99%

Towards Scaling-up Photocatalytic Process for Multiphase Environmental Applications: A Review

Mg¹,

Djellabi²,

Meroni³

et al. 2021

Preprint

Self Cite

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“…where C is concentration of reactant, t is time, k rate constant of reaction, and θ the surface coverage of adsorbed reactant. By assuming surface homogeneity, θ is replaced from classical Langmuir isotherm (43) and Eq. (1) convert to:…”

Section: Kinetics Studymentioning

confidence: 99%

A Sharp Jump in Photocatalytic Activity of Elemental Sulfur for Dye Degradation in Alkaline Solution

Peyman

Azizian

2020

Photochem & Photobiology

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Elemental sulfur is a low‐cost and abundant substance as one of the largest by‐products of the oil industry which was widely used in many industrial activities. Cyclo‐octasulfur (S8) is one of the sulfur allotropes that is a very stable substance in standard conditions. In this study, we report a low‐cost and fast method for the degradation of methyl violet in water under visible light and also sunlight by using elemental sulfur (S8). The results show that sulfur is a good photocatalyst which operates under visible light and can be utilized for degradation of methyl violet. The photocatalytic degradation of methyl violet in acidic, neutral, and alkaline media was investigated, and it was found that the photocatalytic efficiency increases dramatically in alkaline solution. The effects of the initial concentration of the dye, photocatalyst dosage, solution pH, and photocatalyst reusability were investigated. The kinetics of the reaction were studied in detail, and the photocatalytic rate equation was presented.

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“…Spiraling worries about epidemic and pandemic viral diseases, such as severe acute respiratory syndrome coronavirus (SARS-CoV), swine influenza virus (H1N1), middle-east respiratory syndrome coronavirus (MERS-CoV), and novel coronavirus disease-2019 (COVID-19), have drawn the attention of many scientists for viral treatments [17] , [18] , [19] , [20] , [21] , [22] , [23] . Accordingly, to treat the diseases caused by viruses, different methods have been utilized and many attempts have been allocated for disinfection of various viruses presented in the environment [24] , [25] . For waterborne viruses, there is a diversity of disinfection processes like ultraviolet (UV) disinfection, membrane filtration, and chemical disinfectants (ozone, chlorine dioxide, and chlorine) [26] .…”

Section: Introductionmentioning

confidence: 99%

Review on heterogeneous photocatalytic disinfection of waterborne, airborne, and foodborne viruses: Can we win against pathogenic viruses?

Habibi‐Yangjeh

Asadzadeh‐Khaneghah

Feizpoor

et al. 2020

Journal of Colloid and Interface Science

428

103

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Modeling the degradation and disinfection of water pollutants by photocatalysts and composites: A critical review

Cited by 121 publications

References 94 publications

Towards Scaling-up Photocatalytic Process for Multiphase Environmental Applications: A Review

Towards Scaling-up Photocatalytic Process for Multiphase Environmental Applications: A Review

A Sharp Jump in Photocatalytic Activity of Elemental Sulfur for Dye Degradation in Alkaline Solution

Review on heterogeneous photocatalytic disinfection of waterborne, airborne, and foodborne viruses: Can we win against pathogenic viruses?

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