Greywater as a sustainable water source: A photocatalytic treatment technology under artificial and solar illumination

Tsoumachidou, Sophia; Velegraki, Theodora; Antoniadis, Apostolos; Poulios, Ioannis

doi:10.1016/j.jenvman.2016.08.025

Cited by 51 publications

(15 citation statements)

References 63 publications

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“…The observed trend can be attributed to the fact that an increase in the catalyst dosage can provide larger surface area for FVX oxidation and also may increase the amount of active sites which also may enhance photocatalytic efficiency. 28 Further increase of P25 concentration led to a slight decrease of the photodegradation efficiency, a behavior similar to that in previous studies, 29,30 which may be due to a possible aggregation of the catalyst (particle-particle interactions) resulting in a loss of surface area available for light-harvesting. 31 Furthermore, there may be an increase in the opacity of the solution leading to a decrease of light penetration causing reduced activation of the catalyst resulting in marginal change or even reduced degradation due to the negative contributions of aggregation or reduced energy.…”

Section: Heterogeneous Photocatalytic Oxidation Of Fvx Effect Of Catasupporting

confidence: 83%

“…Enhancement of the photocatalytic process by the addition of oxidizing agents, such as hydrogen peroxide, with the ability to capture photogenerated electrons, is an extensively studied procedure. 29,30,34 This is due to various individual phenomena taking place such as the increase of trapped eavoiding e -/h + recombination, enhancement of HO • generation and secondary oxidizing species, increase of intermediate compounds oxidation rate, and decrease in potential problems caused by low O 2 concentration. 35 It is well known that, H 2 O 2 accepts a photogenerated electron from the conduction band and thus promotes charge separation, while it can also form HO • radicals via superoxide.…”

Section: Effect Of Electron Scavengersmentioning

confidence: 99%

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Heterogeneous and homogeneous photocatalytic degradation of psychoactive drug Fluvoxamine: kinetic study, inorganic ions and phytotoxicity evaluation

Tsoumachidou

Κούρας

Poulios

2018

J of Chemical Tech & Biotech

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BACKGROUND Pharmaceutically active compounds, emerging extensively in ecosystems as pollutants, have become an important environmental and public health issue, since they can contaminate drinking water and pose threats to wildlife and human health. As a result, efforts should be made to develop methods to inactivate or eliminate this class of substance in the environment. RESULTS The photocatalytic degradation of psychoactive drug Fluvoxamine has been investigated. In the case of heterogeneous photocatalytic oxidation, the effect of TiO2 P25 concentration (0.1–1 g L‐1), initial concentration of H2O2 (0.25–0.2 g L‐1) and Fe3+ (0.00175–0.014 g L‐1) and pH of the solution on initial reaction rates were evaluated, while for homogeneous photocatalytic oxidation the effect of the amount of H2O2 (0.25–0.2 g L‐1) and Fe3+ (0.00175–0.014 g L‐1) were investigated. In addition, the conversion of the heteroatoms in the FVX molecule to inorganic ions (NO3‐, NH4+, F‐) during the photocatalytic process has been observed and phytotoxicity testing, using three plant species, was carried out in order to examine the effect of photocatalytic oxidation on the toxicity of FVX. CONCLUSION According to the results presented in this study, both heterogeneous and homogeneous photocatalytic oxidation is an efficient methodology for FVX degradation. © 2017 Society of Chemical Industry

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Section: Heterogeneous Photocatalytic Oxidation Of Fvx Effect Of Catasupporting

confidence: 83%

Section: Effect Of Electron Scavengersmentioning

confidence: 99%

Heterogeneous and homogeneous photocatalytic degradation of psychoactive drug Fluvoxamine: kinetic study, inorganic ions and phytotoxicity evaluation

Tsoumachidou

Κούρας

Poulios

2018

J of Chemical Tech & Biotech

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“…Conversely, the high COD/BOD 5 ratio and the nutrients deficiency in greywater could be a limiting factor for the application of biological treatment processes. Moreover, many XOCs still exist after the biological treatment which emphasizes the need for more progressive treatment choices (Tsoumachidou et al ., 2017). Besides, the biological treatment systems have their own drawbacks such as the formation of foaming which decreases their degradation rate.…”

Section: Greywater Treatment Technologiesmentioning

confidence: 99%

“…The studies revealed that the photocatalytic treatment could reduce dissolved organic carbon (DOC) by 72% after 210 min of bench‐scale treatment. Moreover, the decrease in toxicity, phytotoxicity and biodegradability of the simulated wastewater was observed after solar‐induced photocatalytic treatment (Tsoumachidou et al ., 2017).…”

Section: Greywater Treatment Technologiesmentioning

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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“…Various examination can be carried out to conclude the effect of photocatalysis; some of the important test are as follows: bioluminescence assay [12], immobilization test [13], estrogen test, genotoxicity assessment (cell line test) [14] and zone of inhibition (Kirby-Bauer method), and phytotoxicity test [15].…”

Section: Examination Of Photocatalytic Detoxificationmentioning

confidence: 99%

Photocatalysis for Wastewater Treatment with Special Emphasis on Plastic Degradation

Arumugam¹,

Meenkashisundaram²,

Sharma³

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Advanced oxidation process such as photocatalysis is seen as a potential future technology to offer clean water for various human needs. Through this process, different organic pollutants and recalcitrant chemicals are effectively removed from both water and wastewater. Some of the AOPs, such as ozonation (O 3), catalysis by iron ions, electrodes, metal oxides, UV/Fenton, UV/hydrogen peroxide (H 2 O 2), etc., generate harmful intermediates which restrict their full-scale implementation. Alternatively, irradiation techniques such as photocatalysis are a viable option and have shown to treat wastewater contaminated with hazardous chemicals, organic dyes, pesticides, antibiotics, viruses, bacteria, protozoa, etc., without producing toxic levels of by-products. This chapter reviews emerging aspects of photocatalysis for treatment of various recalcitrant pollutants with a special emphasis on polyethylene degradation. It summarizes the source, types, mechanism, and parameters of wastewater treatment using photocatalytic activity. Polyethylene is well known as serious cause of threats to human health and environment. Polyethylene, polystyrene, plastic film, and polypropylene degradation has been shown to occur via photocatalysis. This could be achieved using TiO 2 , ZnO, and doped and undoped metal oxides as photocatalysts. Also, photocatalytic degradation is compared with microbial techniques for polyethylene degradation along with brief reports on novel photobioreactors; a combination of microbial and photocatalytic reactors in degradation of polyethylene.

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Greywater as a sustainable water source: A photocatalytic treatment technology under artificial and solar illumination

Cited by 51 publications

References 63 publications

Heterogeneous and homogeneous photocatalytic degradation of psychoactive drug Fluvoxamine: kinetic study, inorganic ions and phytotoxicity evaluation

Heterogeneous and homogeneous photocatalytic degradation of psychoactive drug Fluvoxamine: kinetic study, inorganic ions and phytotoxicity evaluation

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

Photocatalysis for Wastewater Treatment with Special Emphasis on Plastic Degradation

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