scholarly journals Comparison of advanced oxidation processes in the decomposition of diuron and monuron – efficiency, intermediates, electrical energy per order and the effect of various matrices

2018 ◽  
Vol 4 (9) ◽  
pp. 1345-1360 ◽  
Author(s):  
János Farkas ◽  
Máté Náfrádi ◽  
Tamás Hlogyik ◽  
Bartus Cora Pravda ◽  
Krisztina Schrantz ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Electrical Energy ◽  
Heterogeneous Photocatalysis ◽  
Uv Photolysis ◽  
Oxidation Processes ◽  
Electrical Energy Per Order

The efficiency of UV-photolysis, ozonation, their combination and heterogeneous photocatalysis was investigated and compared in various matrices.

Comparison of advanced oxidation processes in flow-through pilot plants (Part II)

2001 ◽  
Vol 44 (5) ◽  
pp. 311-315 ◽  
Author(s):  
J.-P. Müller ◽  
C. Gottschalk ◽  
M. Jekel
Keyword(s):  
Energy Consumption ◽  
Figure Of Merit ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Electrical Energy ◽  
Batch Experiments ◽  
Oxidation Processes ◽  
Order Of Magnitude ◽  
Flow Through ◽  
Electrical Energy Per Order

The comparison of mechanistically different advanced oxidation processes (AOPS) UV/H2O2, UV/O3 and O3/H2O2 needs a non-specific figure-of-merit to avoid influences by system-inherent parameters. The chosen figure-of-merit consists of the electrical energy per order of magnitude in oxidation per m3, EE/O. Results from own experiments were compared with data derived from the literature. Considered were batch-experiments, pilot-plants and full-scale plants. The combination O3/H2O2 proved to be the most efficient process by means of energy consumption irrespective of the size of the plant.

scholarly journals Toxicology Aspects of the Decomposition of Diuron by advanced Oxidation Processes

2015 ◽  
Vol 43 (1) ◽  
pp. 25-32 ◽  
Author(s):  
Tünde Alapi ◽  
Gergő Simon ◽  
Gábor Veréb ◽  
Krisztina Kovács ◽  
Eszter Arany ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Heterogeneous Photocatalysis ◽  
Point Of View ◽  
Transformation Rate ◽  
Uv Photolysis ◽  
Oxidation Processes ◽  
Ultraviolet Photolysis ◽  
Multicomponent Solutions ◽  
Residual Herbicide

Abstract Diuron is a phenylurea-based residual herbicide with toxic and endocrine disrupting effects. The aims of the present work were the comparison of the efficiency of various advanced oxidation processes, such as direct ultraviolet photolysis, ozonation, their combination, and heterogeneous photocatalysis from the point of view of the transformation rate of diuron, rate of mineralisation and dehalogenation, formation of aromatic intermediates, and ecotoxicological effects of the formed multicomponent solutions during the treatments. The initial rates of transformation of diuron are in the order of ozonation < heterogeneous photocatalysis < UV photolysis < combination of UV photolysis and ozonation. Each method provided similar tendencies in the decrease of the concentration of organically bound chlorines (AOX) since, until the diuron was completely degraded, the concentration of AOX decreased almost to zero in each case. However, only heterogeneous photocatalysis was found to be effective in terms of mineralisation. Ecotoxicological results showed that in each case, except for ozonation, the toxicity of the treated solutions changed through a maximum during the transformation of diuron. The maximum value was found to be lower in the case of heterogeneous photocatalysis. Thus, the formation and decomposition of by-products of relatively higher toxicity than diuron can be supposed. Our results confirmed that the amount of the formed (aromatic) intermediates, their quality and specific toxicity strongly depend on the applied processes.

A pilot-scale investigation of ozonation and advanced oxidation processes at Choa Chu Kang Waterworks

2015 ◽  
Vol 10 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Jenny Wang ◽  
Achim Ried ◽  
Harald Stapel ◽  
Yaning Zhang ◽  
Minghui Chen ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Contaminants ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Electrical Energy ◽  
Pilot Scale ◽  
Oxidation Processes ◽  
Water Matrix ◽  
Electrical Energy Per Order ◽  
Efficient Option

A two-year comprehensive advanced oxidation processes (AOPs) pilot test was completed for a Singapore waterworks in 2011–2013. This study focused on oxidative removal of spiked organic contaminants with ozone and ozone-based AOPs (ozone application together with hydrogen peroxide, which is necessary for AOPs). The ‘optimized H2O2 dosage’ test philosophy was verified during the test period – keeping the residual ozone at 0.3 mg/L in the water for disinfection purpose by minimizing the H2O2 dosage. This study also monitored the bromate concentration in both ozone- and AOP-treated water, and all the samples reported below the laboratory detection limit (&lt;5 µg/L), which is also lower than the WHO Guidelines for Drinking Water Quality (&lt;10 µg/L). For comparison, a low pressure UV-based AOP test was conducted in the final stage of the study. The electrical energy per order (EEO) value is compared with ozone- and UV-based AOPs as well. The results indicated that ozone-based AOP with an optimized hydrogen peroxide dosage could be the most energy efficient option for this specific water matrix in terms of most selected compounds.

Comparison of advanced oxidation processes in flow-through pilot plants (Part I)

2001 ◽  
Vol 44 (5) ◽  
pp. 303-309 ◽  
Author(s):  
J.-P. Müller ◽  
M. Jekel
Keyword(s):  
Figure Of Merit ◽  
Advanced Oxidation Processes ◽  
Tap Water ◽  
Advanced Oxidation ◽  
Electrical Energy ◽  
Flow Reactors ◽  
Oxidation Processes ◽  
Order Of Magnitude ◽  
Continuous Flow Reactors ◽  
Electrical Energy Per Order

The advanced oxidation processes (AOPs) UV/H2O2, UV/O3 and O3/H2O2 were optimised to achieve a 90% degradation of the micropollutant atrazine in continuous-flow reactors. The experiments were performed with spiked Berlin tap-water. The comparison of mechanistically different oxidation systems needs a non-specific figure-of-merit to avoid influences by system-inherent parameters. The chosen figure-of-merit consists of the electrical energy per order of magnitude in oxidation per m3, EE/0. The combination O3/H2O2 proved to be the most efficient process by means of energy consumption.

scholarly journals Treatment of Textile Wastewater Using Advanced Oxidation Processes—A Critical Review

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3515
Author(s):  
Yiqing Zhang ◽  
Kashif Shaad ◽  
Derek Vollmer ◽  
Chi Ma
Keyword(s):  
Wastewater Treatment ◽  
Advanced Oxidation Processes ◽  
Treatment Plant ◽  
Advanced Oxidation ◽  
Textile Wastewater ◽  
Electrical Energy ◽  
High Energy ◽  
Textile Effluent ◽  
Textile Mill ◽  
Oxidation Processes

Textile manufacturing is a multi-stage operation process that produces significant amounts of highly toxic wastewater. Given the size of the global textile market and its environmental impact, the development of effective, economical, and easy-to handle alternative treatment technologies for textile wastewater is of significant interest. Based on the analysis of peer-reviewed publications over the last two decades, this paper provides a comprehensive review of advanced oxidation processes (AOPs) on textile wastewater treatment, including their performances, mechanisms, advantages, disadvantages, influencing factors, and electrical energy per order (EEO) requirements. Fenton-based AOPs show the lowest median EEO value of 0.98 kWh m−3 order−1, followed by photochemical (3.20 kWh m−3 order−1), ozonation (3.34 kWh m−3 order−1), electrochemical (29.5 kWh m−3 order−1), photocatalysis (91 kWh m−3 order−1), and ultrasound (971.45 kWh m−3 order−1). The Fenton process can treat textile effluent at the lowest possible cost due to the minimal energy input and low reagent cost, while Ultrasound-based AOPs show the lowest electrical efficiency due to the high energy consumption. Further, to explore the applicability of these methods, available results from a full-scale implementation of the enhanced Fenton technology at a textile mill wastewater treatment plant (WWTP) are discussed. The WWTP operates at an estimated cost of CNY ¥1.62 m−3 (USD $0.23 m−3) with effluent meeting the China Grade I-A pollutant discharge standard for municipal WWTPs, indicating that the enhanced Fenton technology is efficient and cost-effective in industrial treatment for textile effluent.

scholarly journals Standard reporting of Electrical Energy per Order (EEO) for UV/H2O2 reactors (IUPAC Technical Report)

2018 ◽  
Vol 90 (9) ◽  
pp. 1487-1499 ◽  
Author(s):  
Olya Keen ◽  
James Bolton ◽  
Marta Litter ◽  
Keith Bircher ◽  
Thomas Oppenländer
Keyword(s):  
Organic Contaminants ◽  
Figure Of Merit ◽  
Advanced Oxidation Processes ◽  
Electrical Energy ◽  
Artificial Sweetener ◽  
Reactor Performance ◽  
Oxidation Processes ◽  
Technical Report ◽  
Order Of Magnitude ◽  
Electrical Energy Per Order

Abstract The concept of Electrical Energy per Order (EEO) was introduced in 2001 as a figure of merit for evaluating the energy requirements of ultraviolet-based advanced oxidation processes (UV AOPs) used for the degradation of various organic contaminants. The EEO parameter represents the energy input into the reactor that can achieve an order of magnitude decrease in the concentration of a target contaminant in a unit volume. Since the introduction of this parameter, it has become increasingly popular among UV AOP researchers and practitioners. However, the EEO is often reported without important details that affect the parameter, making its interpretation difficult. The EEO depends on a variety of factors (e.g. the concentration and identity of the target contaminant and the amount of hydrogen peroxide added). Therefore, the EEO parameter needs to be reported in the literature with several other experimental details affecting the reactor performance and in a way that proper comparisons can be made between reactors across studies or manufacturers. This paper discusses the proper application of the EEO parameter for bench-, pilot-, and full-scale studies. Sucralose (artificial sweetener, C12H19Cl3O8) is proposed as a standard substance for reactor comparison.

Application of Ozonation, UV Photolysis, Fenton Treatment and other Related Processes for Degradation of Ibuprofen and Sulfamethoxazole in Different Aqueous Matrices

2012 ◽  
Vol 15 (2) ◽  
Author(s):  
Irina Epold ◽  
Niina Dulova ◽  
Yelena Veressinina ◽  
Marina Trapido
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Uv Photolysis ◽  
Oxidation Processes ◽  
Aqueous Matrices

AbstractTwo pharmaceuticals ibuprofen (IBP) and sulfamethoxazole (SMX) were treated with ozone and advanced oxidation processes (AOPs): UV photolysis, O

Comparison of EEIM and Cumulative Efficiency Methods for the Evaluation and Optimization of Advanced Oxidation Processes for DOC Removal from Water

2003 ◽  
Vol 6 (2) ◽  
Author(s):  
Gary R. Peyton ◽  
Michael J. Fleck ◽  
Mary Hagen LeFaivre
Keyword(s):  
Hydrogen Peroxide ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Cost Effective ◽  
Electrical Energy ◽  
Process Selection ◽  
Oxidation Processes ◽  
Tandem Process ◽  
Using Data

AbstractTwo published criteria for analyzing and optimizing Advanced Oxidation Processes are compared with respect to their usefulness for process optimization and for determination of the most cost-effective of several candidate processes for a particular application. The Cumulative Efficiency (CE) method compares the amount of target contaminant removed per amount of oxidant used. The Electrical Energy per Mass (EE/M) method compares electrical energy required per kilogram of target pollutant removed. The methods were evaluated using data from treatability studies for DOC removal from a ground water contaminated with 50 mg/L of organic carbon, using processes consisting of combinations of ozone, hydrogen peroxide, and ultraviolet light. It was found that the CE method gave better information about how to manipulate the chemistry for optimization, while the EE/M method provided clearer guidance for process selection on economic grounds, making the methods complimentary in treatability studies. The CE method also predicted that a tandem process might function more efficiently than either of the component single processes, which was found experimentally to be the case.

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