A critical review on application of photocatalysis for toxicity reduction of real wastewaters

Rueda-Márquez, Juan José; Levchuk, Irina; Ibáñez, Pilar Fernández; Sillanpää, Mika

doi:10.1016/j.jclepro.2020.120694

Cited by 571 publications

(195 citation statements)

References 104 publications

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“…where they are adsorbed and, under the action of photons, activated and decomposed [31]. A desorption of the reaction products and their removal from the photocatalyst surface complete the process [32].…”

Section: Introductionmentioning

confidence: 99%

An Eco-Friendly Solution for the Efficient Elimination of Pentoxifylline from Water: An Operational Performance Investigation

Gavrilă¹,

Simion²,

Grigoraș³

et al. 2020

Rev. Chim.

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In recent years, more and more pollutants (including pharmaceuticals, personal care products, pesticides, herbicides, hormones, chemicals) are detected in the aquatic environment. Even if they are encountered in very low concentrations, the toxicological data reveal that they represent a major risk both for the water living organisms and for human beings. Moreover, an important resistance to the classical methods applied at wastewater treatment plants characterizes them. Aeration, coagulation, flocculation, sedimentation, filtration, adsorption, oxidation, activated sludge treatments are often either insufficient or completely ineffective. To overcome these drawbacks, many researches were dedicated to the development of new effective techniques for the removal of these water pollutants. Advanced oxidation methods are widely reported as being of the most efficient ones. In this article, we investigate the utility of the photocatalysis as a sustainable alternative for the enhanced elimination of an emergent water micropollutant. We evaluate here the impact of several parameters (catalyst type and concentration, contaminant concentration, radiant flux intensity) on the process efficiency. The targeted compound involved in the experiments was the pentoxifylline (a drug used in the treatment of diseases such as diabetic neuropathy, osteoradionecrosis or hepatic fibrogenesis). The registered pollutant removal rate under the selected reaction conditions (photocatalyst type: ZnO; photocatalyst concentration: 0.5 g/L; incident light flux: 9.52 mW/cm2; natural pH) reached values near to 100 % providing new insights on the viability and the efficiency of the evaluated methodology.

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Section: Introductionmentioning

confidence: 99%

An Eco-Friendly Solution for the Efficient Elimination of Pentoxifylline from Water: An Operational Performance Investigation

Gavrilă¹,

Simion²,

Grigoraș³

et al. 2020

Rev. Chim.

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“…Future studies should seek quantitative identification of intermediates and by‐products, and provide more accurate dynamic models. In addition, there is evidence that the byproducts of degradation, such as glycolaldehyde and formaldehyde, are highly ecotoxic . Hence, special attention should be paid to further research on how to eliminate the generation of these degradation by‐products for the practical application of drinking water reuse AOPs.…”

Section: Discussionmentioning

confidence: 99%

Photocatalytic Advanced Oxidation Processes for Water Treatment: Recent Advances and Perspective

Liu

Wang

2020

Chemistry An Asian Journal

190

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Nowadays, an ever-increasing variety of organic contaminants in water has caused hazards to the ecological environment and human health. Many of them are persistent and non-biodegradable. Various techniques have been studied for sewage treatment, including biological, physical and chemical methods. Photocatalytic advanced oxidation processes (AOPs) have received increasing attention due to their fast reaction rates and strong oxidation capability, low cost compared with the non-photolytic AOPs. This review is dedicated to summarizing up-to-date research progress in photocatalytic AOPs, such as Fenton or Fenton-like reaction, ozonation and sulfate radical-based advanced oxidation processes. Mechanisms and activation processes are discussed. Then, the paper summarizes photocatalytic materials and modification strategies, including defect chemistry, morphology control, heterostructure design, noble metal deposition. The future perspectives and challenges are also discussed.

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“… Remove virus and bacteriophages upto 0.001 m size [6] , [71] , [172] , [191] Advanced oxidation Photocatalysis Ozone-based Oxidation Cold plasma Fenton reagent Photo- Fenton Electro Fenton Ultrasound Wet-Air Oxidation Technology Supercritical Wet-Air Oxidation Technology (SCWO) Nano-catalyst based advanced oxidation process Rapid release of high reactive species (OH* radicals) that oxidizes or destroys enteric viruses and nucleic acids, cell membrane/ capsid of bacteriophages without the release of byproducts. Inactivates enveloped viruses upto 99.99％ [6] , [142] , [159] , [171] , [193] , [195] , [214] , [237] , [238] , [198] , [199] , [200] , [201] , [202] , [203] , [204] , [205] , [206] , [217] , [218] , [219] , [220] Other Processes Stabilization/algal ponds Constructed wetland and water bodies Synergic functions of sunlight Bacteriophages also gets inactivated [188] , [190] …”

Section: Inactivation Of Virusmentioning

confidence: 99%

“…Magnetic metals (iron (Fe), cobalt (Co) and nickel (Ni)), semiconductor nanoparticles (NP) such as metal oxides and doped structures (TiO 2 , ZnO, CuO, MgO, SnO 2 , WO 3 , SiO 2 , Fe 2 O 3 , Nb 2 O 3 , TiO 2 /CuO, Ag/TiO 2 , TiO 2 /Pt, Fe 2 O 3 /TiO 2 , Au/TiO 2 and TiO 2 doped with N-, C-, S-), noble metals (gold (Au), silver (Ag) and platinum (Pt)) based inorganic NPs and engineered carbon NPs (carbon nanotubes (CNTs), C 60 , and C 70 fullerenes) [200] . TiO 2 is a potential photocatalyst semiconductor material due to its strong oxidizing power [201] , prolonged stability high reactivity and faster disinfection kinetics. Illumination of UV light at a wavelength (<385 nm), TiO 2 generates an electron-hole on the surface pair by photon energy and generated hydroxyl radicals (*OH), and the electrons present in the conduction band produced superoxide ions (O 2 − ).…”

Section: Inactivation Of Virusmentioning

confidence: 99%

SARS-CoV-2 in environmental perspective: Occurrence, persistence, surveillance, inactivation and challenges

Mohan

Hemalatha

Kopperi

et al. 2021

Chemical Engineering Journal

125

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A critical review on application of photocatalysis for toxicity reduction of real wastewaters

Cited by 571 publications

References 104 publications

An Eco-Friendly Solution for the Efficient Elimination of Pentoxifylline from Water: An Operational Performance Investigation

An Eco-Friendly Solution for the Efficient Elimination of Pentoxifylline from Water: An Operational Performance Investigation

Photocatalytic Advanced Oxidation Processes for Water Treatment: Recent Advances and Perspective

SARS-CoV-2 in environmental perspective: Occurrence, persistence, surveillance, inactivation and challenges

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