scholarly journals Heterogeneous Photocatalytic Oxidation an Effective Tool for Wastewater Treatment – A Review

10.5772/30134 ◽  
2012 ◽  
Author(s):  
Cheng Chee ◽  
Azrina Abd ◽  
Shaliza Ibrahim ◽  
Manickam Matheswaran ◽  
Pichiah Sarav
Keyword(s):  
Wastewater Treatment ◽  
Photocatalytic Oxidation

Coking Wastewater Physico-Chemical Treatment Technology Evolvement Review

2013 ◽  
Vol 864-867 ◽  
pp. 88-95 ◽  
Author(s):  
Zhi Jiao Liu ◽  
Yun Lng Yang
Keyword(s):  
Wastewater Treatment ◽  
Water Oxidation ◽  
Photocatalytic Oxidation ◽  
Recovery Process ◽  
Coking Wastewater ◽  
Fenton Reagent ◽  
Treatment Technology ◽  
Gas Treatment ◽  
Physico Chemical ◽  
Treatment Research

Coal coking wastewater is generated from coking, coal gas purification and coking product recovery process, its composition is complex and difficult to degrade. By introducing the coking wastewater treatment research and application, such as adsorption,coagulation and sedimentation, flue gas treatment and other physical methods, as well advanced oxidation, wet oxidation, Fenton reagent method, photocatalytic oxidation, ultrasonic oxidation, ozone oxidation method, electrochemical oxidation, supercritical water oxidation, incineration and plasma technology, this paper puts forward the trend of coking wastewater treatment technology.

Evaluation of an alternative method for wastewater treatment containing pesticides using solar photocatalytic oxidation and constructed wetlands

2017 ◽  
Vol 195 ◽  
pp. 133-139 ◽  
Author(s):  
Chrysanthi Berberidou ◽  
Vasiliki Kitsiou ◽  
Dimitra A. Lambropoulou ◽  
Αpostolos Antoniadis ◽  
Eleftheria Ntonou ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Photocatalytic Oxidation ◽  
Alternative Method

Simultaneous photocatalytic oxidation of pharmaceuticals and inactivation of Escherichia coli in wastewater treatment plant effluents with suspended and immobilised TiO2

2012 ◽  
Vol 65 (11) ◽  
pp. 2016-2023 ◽  
Author(s):  
Cristina Pablos ◽  
Rafael van Grieken ◽  
Javier Marugán ◽  
Alejandra Muñoz
Keyword(s):  
Escherichia Coli ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Photocatalytic Oxidation ◽  
Emerging Contaminants ◽  
Fixed Bed ◽  
Treatment Plant ◽  
Fixed Bed Reactor ◽  
Low Concentrations ◽  
Chemical Composition Of Water

Simultaneous Escherichia coli inactivation and oxidation of pharmaceuticals in simulated wastewater treatment plant effluents has been investigated using a photocatalytic treatment with TiO2 in suspension and immobilised onto a fixed-bed reactor. Non-photocatalytic reference experiments of dark adsorption and photolysis showed a higher sensitivity of E. coli towards the chemical composition of water in comparison with the concentration of pharmaceuticals that remains unaffected. Moreover, it must be underlined that the presence of pharmaceuticals (including antibiotics) did not seem to affect the bacterial viability at such low concentrations. Concerning photocatalytic experiments, both suspended and immobilised TiO2 were able to simultaneously inactivate and oxidise both kinds of pollutants (bacteria and pharmaceuticals). The fixed-bed reactor showed similar activity to that of the slurry without deactivation after several cycles of reuse. That makes TiO2 photocatalysis a quite interesting technology for the treatment of drinking water supplies or wastewater plant effluents, allowing the removal of emerging contaminants such as pharmaceuticals during the disinfection treatment.

scholarly journals Performance of different photocatalytic oxidation processes in petroleum wastewater treatment: A Comparative Study

2017 ◽  
Vol 19 (1) ◽  
pp. 167-175 ◽  
Keyword(s):  
Wastewater Treatment ◽  
Photocatalytic Oxidation ◽  
Oxygen Demand ◽  
Fenton Process ◽  
Oxidation Processes ◽  
Alkaline Conditions ◽  
Acidic Conditions ◽  
Main Factors ◽  
Neutral Conditions ◽  
Photocatalytic Processes

<p>The present study was conducted to compare the performance of different solar photocatalytic processes (TiO<sub>2</sub> photocatalysis, photo-Fenton, photo-Fenton coupled with TiO<sub>2</sub> photocatalysis, and photo-Fenton coupled with TiO<sub>2</sub>/ZnO photocatalysis) for the treatment of petroleum wastewater. The removal efficiency of chemical oxygen demand (COD) is evaluated. TiO<sub>2</sub> dosage and pH are the main factors that improve the COD removal in the TiO<sub>2</sub> photocatalysis process while Fe<sup>+2</sup> and H<sub>2</sub>O<sub>2</sub> concentration are the main factors in photo-Fenton process. The photo-Fenton coupled with TiO<sub>2</sub>/ZnO photocatalysis is the most efficient process for treatment of petroleum wastewater at the neutral conditions (pH 7). Therefore, no need to adjust pH during this treatment. In acidic conditions (pH&lt;7), the photo-Fenton process is more efficient than the TiO<sub>2</sub> photocatalysis process while it is less efficient than the TiO<sub>2</sub> photocatalysis process in alkaline conditions (pH&gt;7).</p>

Graphene and its Composite Materials for Water Decontamination

2020 ◽  
Vol 3 (1) ◽  
pp. 41-48
Author(s):  
Manas Roy ◽  
Mitali Saha
Keyword(s):  
Wastewater Treatment ◽  
Composite Materials ◽  
Water Treatment ◽  
Mechanical Strength ◽  
Photocatalytic Oxidation ◽  
Clean Water ◽  
Water Deficiency ◽  
Water Decontamination ◽  
Sustainable Environment ◽  
Treatment Technologies

Acute water cataclysm on account of eco-noxious anthropogenic exploitation caused massive setbacks on the global prerequisite of clean water. Subsequently, with the purpose of circumventing the worldwide unpolluted water deficiency, wastewater treatment technologies have received extraordinary precedence to disinfect water for a sustainable environment. Presently, diverse, efficient materials are being used to remove organic/ inorganic noxious substances from wastewater, among which graphene and its composites have received remarkable attention for water decontamination technology by virtue of their substantial surface area, mechanical strength, mesoporosity, nanosheet arrangement and outstanding absorption proficiency for the contaminant. The present review accentuates the contemporary progresses in the implementation of graphene along with its composite as a potential adsorbent for the exclusion of pernicious inorganic mixture of miscellaneous pollutants, as photocatalysts for the breakdown of venomous organic toxins by employing photocatalytic oxidation. The prospect of graphene and its nanocomposites towards comprehensive water treatment approaches has been discussed.

Photocatalytic oxidation of volatile organic compounds present in airborne environment adjacent to sewage treatment plants

2004 ◽  
Vol 49 (1) ◽  
pp. 111-114 ◽  
Author(s):  
C. Raillard ◽  
V. Héquet ◽  
P. Le Cloirec ◽  
J. Legrand
Keyword(s):  
Wastewater Treatment ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Photocatalytic Oxidation ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Hazardous Substances ◽  
Municipal Sewage ◽  
Volatile Organic ◽  
The Impact

Emissions of volatile organic compounds (VOCs) from wastewater in municipal sewage or industrial wastewater treatment plants are often overlooked as sources of exposure to hazardous substances. The impact of such emissions on local airborne environments represents a growing source of scientific, toxicological and public health interest. Actually, VOCs are suspected to be quite dangerous for human health. Some of them belong to the family of odorous compounds and can cause serious annoyance in the neighbourhood of the emission sources. A way to remove VOCs released from sewers and wastewater treatment facilities could be to degrade them by photocatalytic oxidation. TiO2-based photocatalysts are known to be efficient for this kind of application. In the present work TiO2 P25 Degussa was deposited on glass supports. These materials were tested for the degradation of butanone-2 in a photocatalytic reactor. The influence of water vapour (relative humidity) was shown using the Langmuir-Hinshelwood kinetic model.

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