Comparison of Advanced Oxidation Processes (AOPs) based on O3 and H2O2 for the Remediation of Real Wastewaters

2011 ◽  
Vol 14 (2) ◽  
Author(s):  
Rui C. Martins ◽  
Rosa M. Quinta-Ferreira
Keyword(s):  
Hydrogen Peroxide ◽  
Advanced Oxidation Processes ◽  
Treatment Strategies ◽  
Advanced Oxidation ◽  
Catalytic Ozonation ◽  
Oxidation Processes

AbstractSeveral treatment strategies based in ozone and hydrogen peroxide (single, catalytic ozonation over Mn-Ce-O and Fe

scholarly journals A study on ozonation and ozone based advanced oxidation processes for the removal of naphthenic acids from water: kinetic studies modelling and optimal control

2021 ◽  
Author(s):  
Ali Kamel H. Al jibouri
Keyword(s):  
Hydrogen Peroxide ◽  
Optimal Control ◽  
Advanced Oxidation Processes ◽  
Operating Cost ◽  
Advanced Oxidation ◽  
Kinetic Studies ◽  
Naphthenic Acids ◽  
Catalytic Ozonation ◽  
Oxidation Processes ◽  
Outlet Stream

Industrial wastewater is one of the largest environmental challenges of this century. Most of these wastewaters contain non-biodegradable pollutants which need special treatment methods. Advanced oxidation processes (AOP’s), such as, ozonation, catalytic ozonation and ozone/ hydrogen peroxide have proved their effectiveness on the degradation of bio-recalcitrant pollutants. The main drawback in these processes is the high operating cost. The objective of this study was to develop innovative continuous ozonation and ozone based processes that can effectively degrade industrial non-biodegradable pollutants. Naphthenic acids (NAs) was used as the model pollutant in this study due to its importance as a major pollutant in oil and oil sands industries. The target was to convert bio-recalcitrant NAs into biodegradable substances with minimum consumption of ozone gas (operating cost). These processes can be followed by the biodegradation process to fully remove the rest of the pollutants. This research passed through several stages including screening of operating parameters, kinetic studies, and modeling, followed by optimal control of these processes. It was found that ozone concentration had the most significant effect on the NAs degradation compared to other parameters. The kinetics of direct and indirect (radical) ozonation of NAs were investigated and rate constants and activation energies of these reactions were determined. Catalytic ozonation of NAs was explored using alumina supported metal oxides and unsupported catalysts. Activated carbon was found to be the most effective catalyst. The addition of hydrogen peroxide into the ozonation systems significantly improved the removal of NAs compared with the ozonation only process. Models based on mass balance for the ozonation and ozone/ hydrogen peroxide processes were developed to predict the concentration profiles of reacting species. Optimal control policies of ozone/oxygen gas flow rate versus time were developed and validated to minimize NAs concentration in the liquid outlet stream from the continuous ozonation and ozone/ hydrogen peroxide processes. The experimental results demonstrated that the optimal control policies successfully minimized NAs concentration in the outlet stream. At the same time, ozone gas consumption was reduced to its minimum, i.e., just enough to minimize the concentration of NAs in the outlet stream.

scholarly journals A study on ozonation and ozone based advanced oxidation processes for the removal of naphthenic acids from water: kinetic studies modelling and optimal control

2021 ◽  
Author(s):  
Ali Kamel H. Al jibouri
Keyword(s):  
Hydrogen Peroxide ◽  
Optimal Control ◽  
Advanced Oxidation Processes ◽  
Operating Cost ◽  
Advanced Oxidation ◽  
Kinetic Studies ◽  
Naphthenic Acids ◽  
Catalytic Ozonation ◽  
Oxidation Processes ◽  
Outlet Stream

Industrial wastewater is one of the largest environmental challenges of this century. Most of these wastewaters contain non-biodegradable pollutants which need special treatment methods. Advanced oxidation processes (AOP’s), such as, ozonation, catalytic ozonation and ozone/ hydrogen peroxide have proved their effectiveness on the degradation of bio-recalcitrant pollutants. The main drawback in these processes is the high operating cost. The objective of this study was to develop innovative continuous ozonation and ozone based processes that can effectively degrade industrial non-biodegradable pollutants. Naphthenic acids (NAs) was used as the model pollutant in this study due to its importance as a major pollutant in oil and oil sands industries. The target was to convert bio-recalcitrant NAs into biodegradable substances with minimum consumption of ozone gas (operating cost). These processes can be followed by the biodegradation process to fully remove the rest of the pollutants. This research passed through several stages including screening of operating parameters, kinetic studies, and modeling, followed by optimal control of these processes. It was found that ozone concentration had the most significant effect on the NAs degradation compared to other parameters. The kinetics of direct and indirect (radical) ozonation of NAs were investigated and rate constants and activation energies of these reactions were determined. Catalytic ozonation of NAs was explored using alumina supported metal oxides and unsupported catalysts. Activated carbon was found to be the most effective catalyst. The addition of hydrogen peroxide into the ozonation systems significantly improved the removal of NAs compared with the ozonation only process. Models based on mass balance for the ozonation and ozone/ hydrogen peroxide processes were developed to predict the concentration profiles of reacting species. Optimal control policies of ozone/oxygen gas flow rate versus time were developed and validated to minimize NAs concentration in the liquid outlet stream from the continuous ozonation and ozone/ hydrogen peroxide processes. The experimental results demonstrated that the optimal control policies successfully minimized NAs concentration in the outlet stream. At the same time, ozone gas consumption was reduced to its minimum, i.e., just enough to minimize the concentration of NAs in the outlet stream.

AH∞control for optimizing the advanced oxidation processes—Case of a catalytic ozonation reactor

2015 ◽  
Vol 44 ◽  
pp. 1-9 ◽  
Author(s):  
Manhal Abouzlam ◽  
Régis Ouvrard ◽  
Driss Mehdi ◽  
Florence Pontlevoy ◽  
Bertrand Gombert ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Catalytic Ozonation ◽  
Oxidation Processes

Chemical Models of Advanced Oxidation Processes

1992 ◽  
Vol 27 (1) ◽  
pp. 23-42 ◽  
Author(s):  
William H. Glaze ◽  
Fernando Beltran ◽  
Tuula Tuhkanen ◽  
Joon-Wun Kang
Keyword(s):  
Hydrogen Peroxide ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Industrial Wastes ◽  
Organic Substances ◽  
Ultrapure Water ◽  
Radical Scavengers ◽  
Oxidation Processes ◽  
Radical Intermediates ◽  
Chemical Models

Abstract Advanced oxidation processes (AOPs) have been defined as near-ambient temperature processes that involve the generation of highly reactive radical intermediates, especially the hydroxyl radical. These processes show promise for the destruction of hazardous organic substances in municipal and industrial wastes, in drinking water and in ultrapure water. Three types of AOPs are considered in this paper: catalyzed decomposition of ozone; ozone with hydrogen peroxide (Peroxone); and photolysis of hydrogen peroxide with ultraviolet radiation. Kinetic models for these processes are being developed based on known chemical and photochemical principles. The models take into account measured effects of radical scavengers such as bicarbonate; dose ratios of the oxidants or UV intensity; pH; and the presence of generic radical scavengers. The models are used to discuss two cases: oxidation of parts-per-million levels of nitrobenzene with ozone, Peroxone and peroxide/UV and oxidation of naphthalene and pentachlorophenol with peroxide/UV.

scholarly journals Catalytic Advanced Oxidation Processes for Sulfamethoxazole Degradation

2019 ◽  
Vol 9 (13) ◽  
pp. 2652 ◽  
Author(s):  
Jéssica Martini ◽  
Carla A. Orge ◽  
Joaquim L. Faria ◽  
M. Fernando R. Pereira ◽  
O. Salomé G. P. Soares
Keyword(s):  
Carbon Nanotubes ◽  
Titanium Dioxide ◽  
Reaction Time ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Catalytic Ozonation ◽  
Ion Concentrations ◽  
Oxidation Processes ◽  
Photocatalytic Ozonation ◽  
Mineralization Degree

The degradation of sulfamethoxazole (SMX) by several advanced oxidation processes (AOPs) is carried out in the presence of different catalysts. The catalysts used consisted of carbon nanotubes (CNT), titanium dioxide (TiO2), a composite of carbon nanotubes and titanium dioxide (TiO2/CNT), and iron supported on carbon nanotubes (Fe/CNT). SMX removal was evaluated by catalytic ozonation, photocatalysis, catalytic oxidation with hydrogen peroxide, and combinations of these processes. The evolution of the SMX concentration during reaction time, the mineralization degree, the toxicity of the treated solution, and the formation of organic intermediates and ions were monitored. Ozonation catalyzed by Fe/CNT and CNT and photocatalytic ozonation in the presence of CNT presented the fastest degradation of SMX, whereas photocatalytic ozonation with CNT showed the best results in terms of organic matter removal (92% of total organic carbon (TOC) depletion). Total mineralization of the solution and almost complete reduction of toxicity was only achieved in the photocatalytic ozonation with H2O2 and Fe/CNT catalysts. The compound 3-amino-5-methylisoxazole was one of the first intermediates formed during SMX degradation. p-Benzoquinone was only formed in photocatalysis. Oxalic and oxamic acids were also detected and in most of the catalytic processes they appeared in small amounts. Ion concentrations increased with the reaction time.

scholarly journals Comparison of Landfill Leachate Treatment Efficiency Using the Advanced Oxidation Processes

2013 ◽  
Vol 39 (2) ◽  
pp. 107-115 ◽  
Author(s):  
Barbara Pieczykolan ◽  
Izabela Płonka ◽  
Krzysztof Barbusiński ◽  
Magdalena Amalio-Kosel
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Compounds ◽  
Advanced Oxidation Processes ◽  
Potassium Dichromate ◽  
Advanced Oxidation ◽  
Fenton’S Reagent ◽  
Nitrogen And Phosphorus ◽  
Leachate Treatment ◽  
Fenton's Reagent ◽  
Oxidation Processes

Abstract Treatment of leachate from an exploited since 2004 landfill by using two methods of advanced oxidation processes was performed. Fenton’s reagent with two different doses of hydrogen peroxide and iron and UV/H2O2 process was applied. The removal efficiency of biochemically oxidizable organic compounds (BOD5), chemically oxidizable compounds using potassium dichromate (CODCr) and nutrient (nitrogen and phosphorus) was examined. Studies have shown that the greatest degree of organic compounds removal expressed as a BOD5 index and CODCr index were obtained when Fenton’s reagent with greater dose of hydrogen peroxide was used - efficiency was respectively 72.0% and 69.8%. Moreover, in this case there was observed an increase in the value of ratio of BOD5/CODCr in treated leachate in comparison with raw leachate. Application of Fenton’s reagent for leachate treatment also allowed for more effective removal of nutrients in comparison with the UV/H2O2 process.

Degradation of the fluoroquinolone enrofloxacin by electrochemical advanced oxidation processes based on hydrogen peroxide electrogeneration

2010 ◽  
Vol 55 (6) ◽  
pp. 2101-2115 ◽  
Author(s):  
Elena Guinea ◽  
José Antonio Garrido ◽  
Rosa María Rodríguez ◽  
Pere-Lluís Cabot ◽  
Conchita Arias ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
Electrochemical Advanced Oxidation Processes

scholarly journals The removal of organic compounds from landfill leachate using ozone-based advanced oxidation processes

2018 ◽  
Vol 45 ◽  
pp. 00046
Author(s):  
Jacek Leszczyński ◽  
Jolanta Walery Maria
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Compounds ◽  
Removal Efficiency ◽  
Landfill Leachate ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Uv Absorbance ◽  
Leachate Treatment ◽  
Oxidation Processes ◽  
Ozone Dose

In this study, the application of ozonation and ozonation with hydrogen peroxide processes for landfill leachate treatment was investigated. The effluents were characterized by COD 710 mgO2/dm3 and BOD5 72 mg O2/dm3. According to the adopted indicators, the determined BOD/COD ratio of 0.1 in raw leachates indicates a stabilized landfill. Ozone was applied at doses of 0.15 - 0.6 gO3/dm3, and hydrogen peroxide at such doses to keep the weight ratios of H2O2/O3 0.4 - 1.6. The maximum COD and UV absorbance removal was respectively 29% and 51% by applying a high ozone dose of 0.6 gO3/dm3. After oxidation, the ratio of BOD/COD was increased from 0.1 up to 0.3. It has been shown that by using hydrogen peroxide in ozonation, organic compounds expressed as COD can be efficiently removed from the effluents. The best conditions for the H2O2/O3 process were obtained with a H2O2/O3 ratio of 0.8 and ozone dose of 0.6 gO3/dm3. Under these conditions, the removal efficiency of COD was 46%.

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