Synergistic effect of TiO2 photocatalytic advanced oxidation processes in the treatment of refinery effluents DOI Creative Commons

André Fernandes,

Patrycja Makoś‐Chełstowska, Zhaohui Wang

et al.

Chemical Engineering Journal, Journal Year: 2019, Volume and Issue: 391, P. 123488 - 123488

Published: Nov. 14, 2019

Different types of photolytic and photocatalytic advanced oxidation processes (AOPs) were used for treatment refinery effluents from bitumen production. The efficiency was evaluated by analyzing chemical oxygen demand (COD), biological (BOD5), volatile organic compounds (VOCs) sulfide ions concentration. studies revealed a synergistic effect application external oxidants (O3, H2O2, O3/H2O2) with TiO2 UV applied improved COD BOD5 reduction as well the degradation VOCs present in effluents. Among studied process combined peroxone (TiO2/UV/O3/H2O2) optimal most economical technology. It allows to reduce 38 32% respectively degrade 84% total 280 min treatment. At this conditions reduced exceeds over 30% theoretical value based on dose oxidants, which proves importance photocatalysis developed completely depleted all experiments first 30 addition AOPs technology decrease cost using less amount chemicals achieving similar when comparing non-catalytic technologies. these technologies can be conducted two alternative scenarios; whether deplete sulfides concentration or maximize efficiency. In both options, are promising pre-treatment before other effective at neutral/acidic pH values stage. Further should developed, scaling up pilot scale real case scenario check possibility its implementation industrial practice.

Language: Английский

Generation and Detection of Reactive Oxygen Species in Photocatalysis DOI
Yoshio Nosaka,

Atsuko Y. Nosaka

Chemical Reviews, Journal Year: 2017, Volume and Issue: 117(17), P. 11302 - 11336

Published: Aug. 4, 2017

The detection methods and generation mechanisms of the intrinsic reactive oxygen species (ROS), i.e., superoxide anion radical (•O2-), hydrogen peroxide (H2O2), singlet (1O2), hydroxyl (•OH) in photocatalysis, were surveyed comprehensively. Consequently, major photocatalyst used heterogeneous photocatalytic systems was found to be TiO2. However, besides TiO2 some representative photocatalysts also involved discussion. Among various issues we focused on reactions ROS aqueous suspensions photocatalysts. On careful account experimental results presented so far, proposed following apprehension: adsorbed •OH could regarded as trapped holes, which are a rapid adsorption-desorption equilibrium at TiO2-solution interface. Because shifts adsorption side, holes must actually dominant oxidation whereas solution would exert reactivity mainly for nonadsorbed reactants. most probable routes generating surfaces two polymorphs TiO2, anatase rutile, discussed along with plausible rational reaction processes. In addition four ROS, three that is organic peroxides, ozone, nitric oxide, less common photocatalysis briefly reviewed.

Language: Английский

Citations

3510
Visible-light activation of TiO2 photocatalysts: Advances in theory and experiments DOI
Vinodkumar Etacheri, Cristiana Di Valentin, Jenny Schneider

et al.

Journal of Photochemistry and Photobiology C Photochemistry Reviews, Journal Year: 2015, Volume and Issue: 25, P. 1 - 29

Published: Aug. 28, 2015

Language: Английский

Citations

1259
Removal of emerging contaminants from the environment by adsorption DOI

Carmalin Sophia A.,

Éder C. Lima

Ecotoxicology and Environmental Safety, Journal Year: 2017, Volume and Issue: 150, P. 1 - 17

Published: Dec. 16, 2017

Language: Английский

Citations

826
Review on the criteria anticipated for the fabrication of highly efficient ZnO-based visible-light-driven photocatalysts DOI
Mahsa Pirhashemi, Aziz Habibi‐Yangjeh, Shima Rahim Pouran

et al.

Journal of Industrial and Engineering Chemistry, Journal Year: 2018, Volume and Issue: 62, P. 1 - 25

Published: Feb. 9, 2018

Language: Английский

Citations

807
Recent advances in photocatalysis for environmental applications DOI
Ciara Byrne, Gokulakrishnan Subramanian, Suresh C. Pillai

et al.

Journal of environmental chemical engineering, Journal Year: 2017, Volume and Issue: 6(3), P. 3531 - 3555

Published: Aug. 3, 2017

Language: Английский

Citations

725
Heterogeneous Fenton catalysts: A review of recent advances DOI Creative Commons
Nishanth Thomas, Dionysios D. Dionysiou, Suresh C. Pillai

et al.

Journal of Hazardous Materials, Journal Year: 2020, Volume and Issue: 404, P. 124082 - 124082

Published: Oct. 2, 2020

Heterogeneous Fenton catalysts are emerging as excellent materials for applications related to water purification. In this review, recent trends in the synthesis and application of heterogeneous abatement organic pollutants disinfection microorganisms discussed. It is noted that complexity cell wall increases, resistance level towards various disinfectants increases it requires either harsh conditions or longer exposure time complete disinfection. case viruses, enveloped viruses (e.g. SARS-CoV-2) found be more susceptible than non-enveloped viruses. The introduction plasmonic with broadens visible light absorption efficiency hybrid material, incorporation semiconductor material improves rate regeneration Fe(II) from Fe(III). A special emphasis given use antibacterial applications. Composite magnetite ferrites remain a champion area because their easy separation reuse, owing magnetic properties. Iron minerals supported on clay materials, perovskites, carbon zeolites metal-organic frameworks (MOFs) dramatically increase catalytic degradation contaminants by providing high surface area, good mechanical stability, improved electron transfer. Moreover, insights zero-valent iron its capacity remove wide range pollutants, heavy metals bacterial contamination also Real world role natural matter summarised. Parameter optimisation source, dosage catalyst, concentration H

Language: Английский

Citations

636
Recent developments in physical, biological, chemical, and hybrid treatment techniques for removing emerging contaminants from wastewater DOI
Shams Forruque Ahmed,

M. Mofijur,

Samiha Nuzhat

et al.

Journal of Hazardous Materials, Journal Year: 2021, Volume and Issue: 416, P. 125912 - 125912

Published: April 23, 2021

Language: Английский

Citations

600
Piezoelectric materials for catalytic/photocatalytic removal of pollutants: Recent advances and outlook DOI
Liang Zhang, Chang-Feng Yan, Sami Rtimi

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2018, Volume and Issue: 241, P. 256 - 269

Published: Sept. 15, 2018

Language: Английский

Citations

571
Heterogeneous photocatalysis and its potential applications in water and wastewater treatment: a review DOI
Syed Nabeel Ahmed, Waseem Haider

Nanotechnology, Journal Year: 2018, Volume and Issue: 29(34), P. 342001 - 342001

Published: May 22, 2018

There has been a considerable amount of research in the development sustainable water treatment techniques capable improving quality water. Unavailability drinkable is crucial issue especially regions where conventional drinking systems fail to eradicate aquatic pathogens, toxic metal ions and industrial waste. The this area have given rise new class processes called advanced oxidation processes, particularly form heterogeneous photocatalysis, which converts photon energy into chemical energy. Advances nanotechnology improved ability develop specifically tailor properties photocatalytic materials used area. This paper discusses many those nanomaterials, both metal-based metal-free, studied for waste purification recent years. It also design performance recently reactors, along with advancements visible-light photocatalysis. Additionally, effects fundamental parameters such as temperature, pH, catalyst-loading reaction time reviewed. Moreover, different that can increase efficiency well recyclability systematically presented, followed by discussion on actual wastewater samples future challenges associated it.

Language: Английский

Citations

538
Magnetically separable nanocomposites based on ZnO and their applications in photocatalytic processes: A review DOI

Maryam Shekofteh-Gohari,

Aziz Habibi‐Yangjeh,

Masoud Abitorabi

et al.

Critical Reviews in Environmental Science and Technology, Journal Year: 2018, Volume and Issue: 48(10-12), P. 806 - 857

Published: June 18, 2018

Among the most challenging problems that human beings appear to face are depleting energy sources and increasing environmental pollutions. Heterogeneous photocatalytic processes rewarding technology generate renewable degrade pollutants. In these processes, semiconductors used as photocatalysts. ZnO is a widely photocatalyst, because of its strong oxidation ability, cost effectiveness, non-toxicity, versatility in synthesis, abundance nature, ease crystallization. However, pure has some drawbacks, due wide band gap, poor solar-light utilization, rapid recombination photoinduced charge carriers. Modification using different strategies including coupling with narrow gap semiconductors, noble metal deposition, surface sensitization by organic dyes, elemental doping can easily address shortcomings. addition, separation photocatalysts from treated systems limits their broad applications. Incorporation magnetic materials will help recycling external field. This combination leads new generation photocatalysts, known magnetically separable The present review provides helpful insights into preparation based on applications for degradations

Language: Английский

Citations

524