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Evaluation of Human Norovirus Genogroup-II (HNoV-II) Inactivation by Ozonated Water Using Quantitative PCR Combined with PMA Pretreatment Ozone Sci. Eng. (IF 2.082) Pub Date : 2021-01-12 Masahiro Otaki; Shinobu Kazama
ABSTRACT The disinfection efficiency of ozonation by ozonated water on human norovirus genogroup-II (HNoV-II) and MS2 as a surrogate was investigated using plaque assay and/or quantitative PCR (qPCR). The qPCR combining propidium monoazide (PMA) pretreatment was used to evaluate the damage to the viral capsids, which showed that the PMA pretreatment could be applied to HNoV-II but not to MS2 because
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Mechanistic Insight into the Degradation Pathways of P-cresol in Ozonation, Peroxone, and Ozone-persulfate Process Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-12-29 Su-Huan Kow; Muhammad Ridwan Fahmi; Che Zulzikrami Azner Abidin; Soon-an Ong
ABSTRACT The primary objective of this study is to identify the aromatic intermediate products in p-cresol degradation by ozonation, peroxone, and ozone-persulfate, and elucidate the pathways and mechanisms involved in the processes. The experiments were conducted in semi-batch operating mode, where ozone was bubbled into p-cresol in a 1.0 L cylindrical jacketed glass reactor. In general, the aromatic
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Editorial Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-12-27 Barry L. Loeb
(2021). Editorial. Ozone: Science & Engineering: Vol. 43, No. 1, pp. 1-1.
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Critical Review and Research Needs of Ozone Applications Related to Virus Inactivation: Potential Implications for SARS-CoV-2 Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-12-21 Christina Morrison; Ariel Atkinson; Arash Zamyadi; Faith Kibuye; Michael McKie; Samantha Hogard; Phil Mollica; Saad Jasim; Eric C. Wert
ABSTRACT Ozone disinfection has demonstrated high efficacy against enveloped and non-enveloped viruses, including viruses similar in morphology to SARS-CoV-2. Due to this efficacy, numerous gaseous and aqueous phase ozone applications have emerged to potentially inhibit virus persistence in aerosols, surfaces, and water. This review identifies the exposure requirements for virus inactivation and important
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Applications of Extended Ozonation at Different Stages of A Full-Scale Municipal Wastewater Treatment Plant Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-12-22 Malhun Fakioglu; Burkay Koknar; Izzet Ozturk
ABSTRACT Removal of micropollutants in wastewaters has gained importance in recent years. Advanced treatment processes such as ozone oxidation, activated carbon adsorption, and membrane filtration are required to remove the micropollutants from wastewaters. In this study, extended ozonation was applied at different stages of a wastewater treatment plant (WWTP) to determine its effect on the removal
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Demonstrated SARS-CoV-2 Surface Disinfection Using Ozone Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-12-21 Savannah J. Volkoff; Trevor J. Carlson; Kelsey Leik; Jacques J. Smith; Duane Graves; Philip Dennis; Taylor Aris; Doug Cuthbertson; Andrew Holmes; Kirk Craig; Bruce Marvin; Eric Nesbit
ABSTRACT SARS-CoV-2 has resulted in a global pandemic resulting in the infections of many millions and deaths of well over a million people. The ease of SARS-CoV-2 spread and the infectious nature of the virus in humans has resulted in an urgent need for effective disinfection strategies. Ozone (O3) is a promising disinfectant for SARS-CoV-2 due to its ability to overcome limitations with topical disinfection
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Water Dissolution of Nitrogen Oxides Produced by Ozone Oxidation of Nitric Oxide Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-12-21 Hadi Noori; Jüri Raud; Rasmus Talviste; Indrek Jõgi
ABSTRACT The study investigated the reactive dissolution of gas phase nitrogen-oxides and ozone in water. Mixtures with variable composition of nitrogen oxides were produced by mixing nitric oxide (NO) with ozone. Pure NO in Ar carrier gas resulted in the production of NO2 − but its production rate was limited by low NO solubility. The presence of NO2 in the gas increased the production of NO2 − while
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Improvement of Water Treatment Plant Process for Arsenic and Manganese Removal Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-12-14 S. Y. Jasim; D. Brown; A. Hasan
ABSTRACT The City of White Rock acquired the water system from EPCOR in October 2015. The City of White Rock decided to build a water treatment plant to treat the City’s existing groundwater supplies to remove naturally occurring manganese and arsenic to ensure that an improved drinking water quality is supplied to City residents that meets the Canadian guidelines and esthetic objectives. The City’s
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Removal of Taste and Odor Causing Compounds from Drinking Water Sources by Peroxone Process: Laboratory and Pilot Scale Studies Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-12-08 Malhun Fakioglu; Hazal Gulhan; Hale Ozgun; Mustafa Evren Ersahin; Izzet Ozturk
ABSTRACT Metabolites of some cyanobacteria and actinomycete species such as geosmin and 2-methylisoborneol (MIB) are generally the sources of earthy and musty odor in surface waters. Peroxone process, that is a combination of ozone (O3) and hydrogen peroxide (H2O2), has the potential to effectively remove these compounds. In this study, the removal of MIB with the peroxone process was investigated
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Effect of Ozone on Sprouting of Potato and Sugarcane Seeds: A Sustainable Alternative of Disinfection Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-12-07 Mayra Bataller; Eliet Veliz; Yenei Riverol; Lidia A. Fernández; Jorge L. Salomón; Félix. A. Camilo; Iran Fernández
ABSTRACT The objectives of this study were to evaluate the effect of ozone on sprouting of potato and sugarcane seeds, as well as the ozone efficacy on soft-rot control of seed potatoes and to compare ozone application with conventional treatments in cane seeds. Seed potatoes were treated applying gaseous ozone at 100, 300 and 600 mg m−3 for 45 min before storage. Sugarcane seeds were immersed in water
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Editorial Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-11-26 Barry L. Loeb
(2020). Editorial. Ozone: Science & Engineering: Vol. 42, No. 6, pp. 477-477.
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On the Action of Ozone on Phospholipids, a Model Compound of the External Envelope of Pericapsidic Viruses like Coronavirus. Part 1 Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-10-08 Franco Cataldo; Ottorino Ori
ABSTRACT Coronavirus is a virus with an external protective membrane known as pericapsid and composed essentially by a double layer of phospholipids (PPL) and other components. The destabilization or the decomposition of this pericapsid means the certain inactivation of the coronavirus. The purpose of this work is to show that ozone is able to oxidize easily the phospholipids destabilizing the micellar
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Enhancement of Combustive Removal of Soot at Low Temperatures (~ 150 °C) Using Ozone as an Oxidant and Potassium-Substituted Lanthanum Manganite as a Catalyst Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-11-05 Jin Soo Lee; Tae Uk Park; Kwan-Young Lee; Dae-Won Lee
ABSTRACT Ozone (O3) is a strong oxidant, which is able to oxidize carbonaceous solid soot even at ambient temperature. In this study, we found that the ozone-induced oxidation of soot was noticeably enhanced in the range 100–150 °C when La1-x K x MnO3 (x = 0, 0.1, 0.25) was used as a catalyst. The oxidation was limited at T < 300 °C owing to the thermal instability of ozone, but during temperature-programmed
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Inactivation of Bacterial Spores on Polystyrene Substrates Pre-exposed to Dry Gaseous Ozone: Mechanisms and Limitations of the Process Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-11-03 Pierre Levif; Sylvie Larocque; Jacynthe Séguin; Michel Moisan; Jean Barbeau
ABSTRACT Some polymers can both absorb dry gaseous ozone and release it efficiently. This occurs, for example, with polystyrene (PS) surfaces, which acquire biocidal properties: bacterial spores are indeed inactivated when deposited wet on polystyrene exposed to ozone. Two main features need to be examined in relation with these assertions: PS surfaces pre-exposed to dry ozone can release O3 molecules
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Degradation Treatment of Concentrated Landfill Leachate by Catalytic Ozonation in a Microbubble Reactor Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-11-03 Xiaoyu Tang; Shu Zhu; Xuejun Quan; Xiaoxue Huang; Facheng Qiu; Chengfei Feng
ABSTRACT The catalytic ozonation, combining ozone with solid catalysts technology, was adopted to dispose of the reverse osmosis concentrate (ROC) produced from landfill leachate. To explore an effective and economically sustainable process, three different combined processes were investigated in a microbubble reactor. The considered catalytic oxidation processes were Ca(OH)2/O3+ AC/O3, Ca(OH)2+ AC/O3
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SARS-CoV-2 Inactivation by Ozonated Water: A Preliminary Alternative for Environmental Disinfection Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-11-03 Ronaldo B. Martins; Italo A. Castro; Marjorie Pontelli; Juliano P. Souza; Thais M. Lima; Stella Rezende Melo; João Paulo Zen Siqueira; Maicon Henrique Caetano; Eurico Arruda; Margarete Teresa Gottardo de Almeida
ABSTRACT The rapid spread of SARS-CoV-2 caused a global pandemic. Due to the lack of treatment and vaccines, safety strategies must be found to stop the virus dissemination. The objective of this study was to evaluate the virucidal activity of ozonated water, a powerful oxidizing agent, against SARS-CoV-2. A special faucet was the source of ozonated water at a low concentration (0.2–0.8 ppm). At this
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Ozonized Water in the Preconditioning of Corn Seeds: Physiological Quality and Field Performance Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-11-03 Natasha Ohanny da Costa Monteiro; Ernandes Rodrigues de Alencar; Nara Oliveira Silva Souza; Tairone Paiva Leão
ABSTRACT Corn is a cereal of great economic and social importance worldwide. The objective of the present work was to evaluate the effects on the physiological quality and the performance in the field of corn seeds with different quality standards before and after hydropriming with ozone. To evaluate the effects on the physiological quality, two batches (one with high physiological quality and the
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Organic Compound Degradation Induced by Br Oxidation with O3 Fine Bubble Injection into Seawater Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-10-12 Yoshinari Wada; Kaoru Onoe; Masakazu Matsumoto
ABSTRACT An advanced technique for the utilization of the dissolved Br in concentrated seawaters discharged from the salt manufacturers in Japan can enable the development of a comprehensive utilization system for seawater resources. Hypobromous acid (HOBr) and hypobromite ion (BrO–) obtained by the oxidative reaction of Br– degrade the many organic compounds and can be utilized as water purification
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Use of Ozonized Water to Control Anthracnose in Papaya (Carica papaya L.) and its Effect on the Quality of the Fruits Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-10-08 André Rodrigues da Costa; Lêda Rita D’Antonino Faroni; Luiz Carlos Chamhum Salomão; Paulo Roberto Cecon; Ernandes Rodrigues de Alencar
ABSTRACT Post-harvest fungal diseases, such as anthracnose, are common causes of spoilage in papaya fruits, accounting for considerable economic losses. The use of ozone gas is an alternative to tackle this problem, as it is a strong oxidizing and antimicrobial agent. Thus, the objective of the present work was to evaluate the efficiency of ozonized water for controlling anthracnose in papayas. It
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In Vitro Antimicrobial Activity of Ozonated Sunflower Oil against Antibiotic-Resistant Enterococcus faecalis Isolated from Endodontic Infection Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-10-01 Camila Gonçalves Jezini Monteiro; M.S. Gama; B. F. Moura; G. G. Cabral-Oliveira; A. L. Mattos-Guaraldi; Carlos José Lima; R. X. Lins
ABSTRACT The antibacterial efficacy of ozonated sunflower oil against Enterococcus faecalis biofilm was evaluated comparing to gaseous ozone. Sixty disks of composite resin were distributed in sterile microtubes containing bacterial suspension of an antibiotic-resistant E. faecalis isolated from endodontic infection. After incubation for 24 hours at 37°C, six protocols were conducted (n = 10): group
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In Vitro Comparison of Antibacterial Effect of Ozonated Water and Ozonated Gas Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-10-01 Felipe Agostini; Melissa Faccini; Francisco Fitarelli; Mariana Aparecida Lopes Ortiz; Samira Salmeron; Ricardo Cesar Gobbi Oliveira; Fabricio Pinelli Valarelli; Renata Cristina Oliveira; Karina Maria Salvatore Freitas
ABSTRACT This study aimed to compare the antibacterial effect of ozonated water and ozonated gas at different concentrations and exposure times. Staphylococcus aureus and Enterococcus faecalis were exposed to ozonated water or ozonated gas at concentrations of 20, 40 and 60 μg/mL for 1 and 2 minutes. A positive control with bacteria and a chlorhexidine 2% negative control were used. The number of colony-forming
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Effectiveness of Ozone Gas on Airborne Virus Inactivation in Enclosed Spaces: A Review Study Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-10-01 Mahmood Alimohammadi; Maziar Naderi
ABSTRACT Due to the recent outbreak of COVID-19, the problem of protecting the individual against airborne transmission has become of great importance. This transmission occurs when virus-containing droplets enter the respiratory tract. Accordingly, the inactivation of airborne viruses plays significant role in mitigating the threat posed by a human-to-human infectious disease. The use of gas-based
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Degradation of Linear Alkylbenzene Sulfonate by UV/H2O2 Process Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-09-15 Hiroshi Sakai; HangXiang Song; Ryota Goto
In this study, we investigated the degradation of linear alkylbenzene sulfonate (LAS) by an ultraviolet/hydrogen peroxide (UV/H2O2) process. In a collimated beam experiment with UV light of wavelength 222 or 254 nm, faster LAS degradation rates occurred at elevated H2O2 concentrations. The degradation behavior varied with the wavelength of the light source. Furthermore, according to the results of
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Experimental Analysis of a Cylindrical Ozone Generator with a Partitioned High-voltage Electrode Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-09-03 Mehdi Tayeb Layati; Kamel Nassour; Said Nemmich; M. Brahami; Amar Tilmatine
Many studies have analyzed the performance of ozone generation systems to achieve the maximum ozone concentration with the lowest possible energy consumption. This study conducted an experimental analysis of a cylindrical ozone generator with a discharge gap reduced to 0.5 mm and a partitioned high-voltage electrode composed of three copper foil strips. The proposed model was compared with a similar
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Effects of Intermittent Ozone Treatment on Postharvest Quality and Storage Life of Pomegranate Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-09-03 Oya Buluc; Mehmet Ali Koyuncu
The effects of intermittent ozone treatment on the storage quality and life of pomegranate were investigated. Fruit were exposed to 0.5 ppm gaseous ozone for 30 minutes initially and during cold storage at 1-month intervals. Control group was exposed to only air under same condition. Packaged fruit were stored at 6°C and 90 ± 5% relative humidity for 4 months. Ozone treatment suppressed respiration
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Editorial Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-09-01 Barry L. Loeb
(2020). Editorial. Ozone: Science & Engineering: Vol. 42, No. 5, pp. 377-377.
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Ozone: A Potential Oxidant for COVID-19 Virus (SARS-CoV-2) Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-07-27 Chedly Tizaoui
Currently, no medicine has demonstrated efficacy in treating the ongoing pandemic COVID-19 caused by SARS-CoV-2 virus. Being a potent oxidant, ozone is lethal against most bacteria and viruses found in water, or on surfaces and aerosols. Ozone has also been successfully used to treat several viral diseases such as Ebola and HIV Hepatitis B and C. Using molecular modeling, this study evaluated the reactivity
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Removal of Cyanotoxins in Detroit River Water Using Ozone-Based Advanced Oxidation Processes Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-07-29 S.Y. Jasim; M. Uslu; R. Seth; N. Biswas
The removal of cyanotoxins, microcystin-LR (MLR), anatoxin-a (ANA), and cylindrospermopsin (CYN) in Detroit River water (DRW) was investigated by ozone and advanced oxidation process (AOP). Enhanced removal of all cyanotoxins was observed with increasing applied ozone dose. The reactivity of cyanotoxins with ozone followed the order of MLR>CYN>ANA in DRW at its natural pH of 7.6, as indicated by the
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Ozonation of Brazil Nuts in Aqueous Media at Different pH Levels: Ozone Decomposition, Aspergillus flavus Inactivation, and Effects on Nut Color and Crude Oil Lipid Profile Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-09-01 Wallas Felippe de Souza Ferreira; Ernandes Rodrigues de Alencar; Luiz Eduardo Bassay Blum; Márcia de Aguiar Ferreira; Marcio Antônio Mendonça; Aline Mondini Calil Racanicci; Wilfredo Milquiades Irrazabal Urruchi
The present work aimed to evaluate the decomposition kinetics of ozone in aqueous media with Brazil nuts. It also intended to investigate the potential of ozonation for inactivating Aspergillus flavus, and to determine changes in nut color and crude oil lipid profile. To do so, an inlet ozone concentration of 13.0 mg L−1, at a flow rate of 1 L min−1 and 25°C, was adopted. For the ozonation process
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Kinetic Study of Manganese Precipitation of Nickel Laterite Leach Based-solution by Ozone Oxidation Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-08-11 Beatriz Peralta Oruê; Amilton Barbosa Botelho Junior; Jorge Alberto Soares dos Santos Tenório; Denise Crocce Romano Espinosa; Marcela dos Passos Galluzzi Baltazar
The increase in nickel and cobalt consumption encourages the exploration of different resources. Limonite ore exploration is carried out through the hydrometallurgical route. After nickel and cobalt separation, the remaining solution contains manganese to be recovered. The present study aimed at the kinetic modeling of manganese precipitation by ozonation. The experiments were carried out in a 250
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Investigation of Color Fading and Fabric-Touch Test for Jeans through Ozonation Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-08-11 Lizhu Hu; Xinyi Zhou; Juanfen Chen; Xiuling Zhang; Guoqiang Chen; William Chang; Alice Ye; Hong Yi; Changhai Yi
Color fading through ozonation has been previously studied by our and other labs. Although great progress has been achieved in this field, studies for the optimization of the operating process of the ozone water washing process and fabric-touch tests are important for the practical application in industry. An industrial-scale G2 ozone washing machine was used for the color fading of the samples. Since
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Preliminary Study: Comparative Analysis of the Effects of Ozone and Ultrasound on Streptococcus Mutans Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-08-10 Pâmela Maria Moreira Fonseca; Debora Alicia Buendía Palacios; Paulo Luiz de Sá Júnior; Walter Miyakawa; Álvaro José Damião; Adriana Barrinha Fernandes; Carlos José de Lima
Streptococcus mutans is one of the principal pathogens of the human oral habitat, being one of the principal etiological agents of carious lesions. Ozone is a powerful oxidant, it has the ability to inactivate microorganisms in general, and ultrasound is an acoustic system generated through a piezoelectric crystal that also presents microbicidal effects. In the present study, a comparative analysis
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Physiological and Biochemical Response of Rice Cultivars (Oryza Sativa L.) To Elevated Ozone Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-07-31 Ambikapathi Ramya; Periyasamy Dhevagi; Sengottiyan Priyatharshini; C.N Chandrasekhar; K Valliappan; S Venkataramani
A study was carried out to evaluate the effect of elevated tropospheric ozone concentration on 15 rice cultivars. The cultivars were exposed to a weighted average ozone concentration of 51 ppb ±10% (10:00–17:00 h) for 30 days on its reproductive stage. On an average, elevated ozone significantly affects photosynthetic rate (−19.23%), stomatal conductance (−21.35%) and the contents of chlorophyll (−27
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Characterization and Treatment of Medical Laboratory Wastewater by Ozonation: Optimization of Toxicity Removal by Central Composite Design Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-07-31 Irfan Basturk; Gamze Varank; Selda Murat-Hocaoglu; Senem Yazici-Guvenc; Elmas Eva Oktem-Olgun; Oltan Canli
This study performed a long-term characterization of medical laboratory wastewaters (MLWs) arising from diagnosis and examination units. The results indicated that the MLWs may be assessed as strong domestic wastewater and also have highly toxic properties. Furthermore, statistical optimization of toxicity removal through ozonation was investigated using the central composite design. COD, BOD5, AOX
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Advanced Oxidation Technology (Ozone-catalyzed by Powder Activated Carbon - Portland Cement) for the Degradation of the Meropenem Antibiotic Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-07-31 Edison Alexander Agudelo; Santiago Alonso Cardona G.
ABSTRACT An advanced oxidation system based on ozone, activated carbon and Portland cement was evaluated for the removal of the beta-lactam antibiotic Meropenem (emerging contaminant, EC). This system was validated with synthetic wastewater with characteristics similar to those of hospital wastewater. The total elimination of the antibiotic and a 90% reduction in the initial chemical oxygen demand
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First Application of Ozone Postharvest Fumigation to Remove Smoke Taint from Grapes Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-07-29 A. Antolini; R. Forniti; M. Modesti; A. Bellincontro; C. Catelli; F. Mencarelli
Smoke taint is becoming a worldwide problem for wine production because of the increasing number of fires in wine regions. It is the result of volatile phenols released by fire smoke which bind to berry sugars, translocate mainly through bunch stem and/or through berry skin. The techniques used to remove smoke taint from wine can modify wine quality provided that smoke taint is completely removed from
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Study of Nickel Nanoparticles in Highly Porous Nickel Metal–Organic Framework for Efficient Heterogeneous Catalytic Ozonation of Linear Alkyl Benzene Sulfonate in Water Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-07-16 Vahid Mohammadi; Masoumeh Tabatabaee; Abdolmajid Fadaei; Seyed Abolghasem Mirhoseini
Metal–organic frameworks (MOFs), as a relatively new class of crystalline porous materials with large surface area and ultrahigh porosity, are extensively used in heterogeneous catalysts. In this study, the efficiency of heterogeneous catalytic ozonation process (COP) with a new nickel nanoparticle-based catalyst in highly porous carbon derived from nickel-MOF was investigated for Linear Alkyl benzene
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Investigation into the Ozone Reactivity during the O3/O2 Flotation of Recovered Cellulosic Fiber: Does Ozone Affect the Papermaking Properties of Fibers? Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-06-26 A. Ghorbel; N. Marlin; M. Aurousseau; A. Boyer
The ozone reactive flotation for deinking recovered cellulosic fibers, recently developed at lab scale, showed interesting results in terms of fiber yield and effluent pollution reduction with classical recovered fibers furnishes made of old magazines and old newspapers. However, deinked pulp yellowing occurred. To further develop the ozone-based deinking process, a deeper investigation was conducted
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Characterization of a Doped MnO2Al2O3 Catalyst and its Application Inmicrobubble Ozonation for Quinoline Degradation Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-06-18 Xinwang Liu; Shutao Wang; Hao Yang; Zhisheng Liu; Ying Wang; Fucheng Meng; Jun Ma; Oksana S. Izosimova
The process of catalytic ozonation shows promise for the degradation of refractory contaminants. A doped MnO2/Al2O3 catalyst was prepared and utilized to achieve catalytic microbubbles ozonation for quinoline degradation. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis show that the active component, MnO2 (spherical, approximately 30–50 nm in diameter) dispersed well in the
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Ozone and the Coronavirus Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-06-17 Barry L. Loeb
(2020). Ozone and the Coronavirus. Ozone: Science & Engineering: Vol. 42, No. 4, pp. 293-293.
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The Effect of Heat Treatment in Different Atmospheres on Tungsten-doped MnO2 for Ozone Decomposition Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-06-09 Yajie Yang; Dan Shen; Pengyi Zhang
Ozone penetrating from outdoors may cause indoor secondary pollution. The role and mechanism of heat treatment in improving the catalytic activity for ozone decomposition are not very clear. Here we investigated the effect of heat treatment (200–500 °C) in three different atmospheres, i.e., air, helium, and hydrogen on a tungsten-doped MnO2 catalyst (W-MnO2). The possible changes of crystal structure
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Occurrence of Emerging Contaminant Acesulfame in Water Treatment System and Its Degradation during Ozone Oxidation Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-06-05 Ruonan Zhou; Sijia Lu; Yali Song; Xiaoyan Ma; Xueyan Li; Jia Jia; Yang Deng
The occurrence of acesulfame (ACE) in two full-scale drinking water treatment plants (DWTPs) in Zhejiang Province, China, was investigated. The results showed that ACE was commonly detected in the raw water of the DWTPs at ND–0.125 and ND–0.093 μg/L, respectively. The maximum ACE removal efficiencies in the DWTP with traditional processes were less than 10%, whereas those in the DWTP with advanced
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Diclofenac Degradation by Ozone-Based Oxidation Processes: PROMETHEE Method, Kinetic and Cost-Effectiveness Study Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-05-27 Eylem Topkaya; Ayla Arslan; H. Cengiz Yatmaz
In this study, the treatment of diclofenac (DCF), which is a pain reliever belonging to non-steroid anti-inflammatory drug group, was investigated by ozone-based oxidation processes. In experiments; pH (6–7) and 10 min reaction times were kept constant and the effects of different initial concentrations (5 mg/L, 10 mg/L and 20 mg/L), ozone doses (5 and 8 ppm), power of UV lamps (16 W and 32 W) and
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Benzene Removal from Aqueous Solutions by Heterogeneous Catalytic Ozonation Process with Magnesium Oxide Nanoparticles Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-05-25 Leili Mohammadi; Abbas Rahdar; Edris Bazrafshan; Hamid Dahmardeh; Anna Thysiadou; George Z. Kyzas
The application of a heterogeneous catalytic ozonation process with magnesium oxide (MgO) nanoparticles for the degradation of benzene in aqueous solutions was investigated by a Central Composite Design to optimize experimental conditions. Analysis of variance (ANOVA) was used for studying the significance and adequacy of the model. Four independent variables including pH (3–12), catalyst dose (0.1–0
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Ozonation Catalyzed by CoxFe1 Layered Double Hydroxide for the Degradation of P-toluenesulfonic Acid Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-05-25 Xiaojie Fu; Yuanxing Huang; Yaowei Wang; Manli Liang; Ya Yang; Zhihao Jin; Junhao Yang; Shouxun Hu; Liang Li
Catalyst of Fe–Co-layered double hydroxide (LDH) prepared by co-precipitation could effectively improve the degradation of pharmaceutical intermediate – p-toluenesulfonic acid (p-TSA) in the water during ozonation. The experimental results showed that under the condition of pH 7.9, catalyst dosage 0.1 g/L and aqueous ozone concentration 6.2 mg/L, 20 mg/L of p-TSA obtained a TOC removal percentage
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Ozone Processing of Cassava Starch Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-05-13 Dâmaris Carvalho Lima; Nanci Castanha; Bianca Chieregato Maniglia; Manoel Divino Matta Junior; Carla Ivonne Arias La Fuente; Pedro Esteves Duarte Augusto
ABSTRACT This work evaluated the ozonation of cassava starch, correlating the process conditions with starch structure and properties. The starch structure was evaluated considering both molecules and granules. Ozonation resulted in an increased number of carbonyl and carboxyl groups with increasing ozone consumption. Moreover, a reduction of large and branched molecules was observed, with the consequent
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Ozone Processing of Cassava Starch Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-05-13 Dâmaris Carvalho Lima; Nanci Castanha; Bianca Chieregato Maniglia; Manoel Divino Matta Junior; Carla Ivonne Arias La Fuente; Pedro Esteves Duarte Augusto
This work evaluated the ozonation of cassava starch, correlating the process conditions with starch structure and properties. The starch structure was evaluated considering both molecules and granules. Ozonation resulted in an increased number of carbonyl and carboxyl groups with increasing ozone consumption. Moreover, a reduction of large and branched molecules was observed, with the consequent increase
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Mechanism and Kinetic Study on the Degradation of Typical Biomass Tar Components (Toluene, Phenol and Naphthalene) by Ozone Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-04-30 Zhengcheng Wen; Yan Liu; Hongzhe Shen; Ning Ding; Yuan Li; Dan Luo
ABSTRACT The detailed reaction mechanisms for degrading typical biomass tar components (toluene, phenol and naphthalene) by ozone were investigated by employing Density Functional Theory and ab-initio methods. Results showed that toluene, phenol and naphthalene were degraded by ozone in a similar way by destroying C=C bonds and aromatic ring. For toluene and phenol, ozone preferentially destroys C=C
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Statement on COVID-19 Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-04-27
(2020). Statement on COVID-19. Ozone: Science & Engineering: Vol. 42, No. 3, pp. 211-212.
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Effect of Ozone Exposure on Water Uptake and Germination of Lentil (Lens Culinaris) Seeds Ozone Sci. Eng. (IF 2.082) Pub Date : 2020-04-24 P. R. F. De Souza; G. C. C. Souza; J. V. F. A. Pinto; A.C.O.C. Doria; L. M. Nascimento; M. C. Gomes; A. S. Da Silva Sobrinho; G. Petraconi; J. C. Sagás; B. V. M. Rodrigues; Rodrigo Sávio Pessoa
ABSTRACT The purpose of the current study was to investigate the effect of ozone exposure on the process of water uptake and germination of lentil (Lens culinaris) seeds. For this, a commercial ozone generator that provides a concentration of 1 g/m3 generated from atmospheric air was used. In the experiments 10 lentil seeds were used per treatment carried out at different times of exposure to ozone:
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Developments in Ozone-Based Bleaching of Pulps Ozone Sci. Eng. (IF 2.082) Pub Date : 2019-07-29 Sandeep Kumar Tripathi; Nishi Kant Bhardwaj; Himadri Roy Ghatak
This paper summarizes the review of developments in the area of ozone-based elemental chlorine free (ECF) and total chlorine free (TCF) bleaching of wood and non-wood pulps. Focused areas of review are reaction mechanism of ozone with carbohydrates and lignin, effect of process conditions maintained during ozone bleaching on pulp properties, effect of using different cellulose protectors, effect of
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Modeling and experimental of mould disinfestation of soybean silos with ozone Ozone Sci. Eng. (IF 2.082) Pub Date : 2019-06-24 Thauan Gomes; Sílvia B. Canever; Geovana D. Savi; Karim C. Piacentini; Maykon Cargnin; Bianca G. Furtado; Ana C. Feltrin; Marintho B. Quadri; Elidio Angioletto
This study aimed to develop and validate a mathematical model for predicting ozone propagation and distribution in a bench-scale storage silo of soybean and link the model results to its application as an antifungal. The reduction of potentially toxigenic fungi found in soybeans was also evaluated after the ozone treatment. Experimental validation consisted of the ozone application and concentration
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Photocatalytic Decolorization of Congo Red Wastewater by Magnetic ZnFe2O4/Graphene Nanosheets Composite under Simulated Solar Light Irradiation Ozone Sci. Eng. (IF 2.082) Pub Date : 2019-06-30 Ru Jiang; Hueyue Zhu; Yongqian Fu; Shengtao Jiang; Enmin Zong; Jun Yao
ZnFe2O4 supported on graphene nanosheets (ZnFe2O4@GNs) was prepared by a one-step hydrothermal method. Characterization results of XRD and SEM demonstrated that ZnFe2O4 has been anchored on the surface of graphene nanosheets. After four successive cycles, removal efficiency of congo red is 88.66% by ZnFe2O4@GNs while 39.80% by ZnFe2O4, suggesting high photocatalytic stability of ZnFe2O4@GNs under simulated
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Is Coefficient of Variation a Realistic Index for Characterizing Mixing Efficiency in Ozone Applications? Ozone Sci. Eng. (IF 2.082) Pub Date : 2019-07-25 Srikanth. S. Pathapati; Daniel W. Smith; Justin P. Bennett; Angelo L. Mazzei
The coefficient of variation (COV) of ozone residual is often used to compare the mixing performance of different ozone contacting systems. Multiphase mass transfer CFD modeling is performed and compared with experimental data to investigate the correlation between mass transfer efficiency, a corresponding full cross-sectional spatial COV, a corresponding “grab sample” temporal COV, and a comprehensive
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The Effect of Ozonation on Particle Size Distribution for Recirculating Aquacultural Seawater: Analysis of Particle Flocculation and Breakup Ozone Sci. Eng. (IF 2.082) Pub Date : 2019-07-25 Mingdong Ji; Kang Wu; Jianping Li; Zhangying Ye; Haijun Li; Songming Zhu
Solids removal is very important for water quality maintenance in recirculating aquaculture systems (RAS). Ozonation is a practical water treatment which can promote the solids removal. However, the characteristics of ozonation effects on particles are still unclear. In this study, the effect of ozonation on particle size distribution (PSD) was investigated for seawater from a RAS of Pacific white
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Selection of Catalysts for Use in a Heterogeneous Catalytic Ozonation System Ozone Sci. Eng. (IF 2.082) Pub Date : 2019-06-28 Edison Alexander Agudelo; Santiago Alonso Cardona G.
For this article, the authors tested various commercially available materials, such as activated carbon of vegetable origin, kaolin, vermiculite, Portland cement, magnetite and Earth´s Fuller to identify which is the best catalyst in the production of hydroxyl radical. The researchers used oxalic acid as a test compound to quantify the production of hydroxyl radical, taking advantage of the rapid reaction
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Catalytic Ozonation by Manganese, Iron and Cerium Oxides on γ-Al2O3 Pellets for the Degradation of Organic Pollutants in Continuous Fixed-Bed Reactor Ozone Sci. Eng. (IF 2.082) Pub Date : 2019-06-18 Wencan Qi; Jing Wang; Xie Quan; Shuo Chen; Hongtao Yu
Heterogeneous catalytic ozonation is an efficient technology for degrading refractory organic pollutants in water. However, most studied heterogeneous catalysts for catalytic ozonation were powders, which were not practically available for continuous fixed-bed reactor in water treatment. In this work, manganese, iron and cerium oxides on γ-Al2O3 pellets were synthesized and used as heterogeneous catalysts
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Ozone as a Pretreatment Method for Antibiotic Contaminated Wastewater and Sludge Ozone Sci. Eng. (IF 2.082) Pub Date : 2019-06-10 Igor Boševski; Gabriela Kalčikova; Janez Cerkovnik; Andreja Žgajnar Gotvajn
The capability of ozone to reduce the hazardous impact of environmentally persistent antibiotic tiamulin in term of toxicity reduction and enhancement of biodegradability was investigated. Different ozone doses were applied but ozonation was not effective enough to increase the biodegradability of tiamulin in the aqueous phase. The opposite effect was observed in anaerobic digestion experiments, where
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The Mortality of Nematodes in Drinking Water in the Presence of Ozone, Chlorine Dioxide, and Chlorine Ozone Sci. Eng. (IF 2.082) Pub Date : 2019-04-22 Jasna Kos; Mirjana Brmež; Marinko Markić; Laszlo Sipos
Nematodes are among the organisms most commonly found in treated water. Although they are believed to be harmless, colonization of nematodes by pathogenic bacteria may transform them into harmful contaminants of the drinking water. Thus, efficient disinfectants must be applied to inactivate and remove nematodes. In the present study, nematode inactivation using different concentrations of ozone, chlorine
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Microbial Counts and Antibiotic Resistances during Conventional Wastewater Treatment and Wastewater Ozonation Ozone Sci. Eng. (IF 2.082) Pub Date : 2019-07-29 K. Kirchner; I. Brückner; K. Klaer; M. Hammers-Wirtz; J. Pinnekamp; M. A. Rosenbaum
In view of the increasing interest in the occurrence and spread of antibiotic-resistant bacteria due to wastewater treatment systems into the environment, total colony counts and antibiotic-resistant bacteria were determined in regard to a conventional wastewater treatment plant and its upgrade with a wastewater ozonation. To cope with the elimination of conventionally not sufficiently decimated micropollutants
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