Ozone: Science & Engineering最新文献

{"title":"Influence of Solvent upon Reactive Capacity of Ozone in Respect of 1,3-Dimethyl-Substituted Uracils","authors":"A. A. Maksyutova, Yuriy S. Zimin, A. Mustafin","doi":"10.1080/01919512.2022.2052014","DOIUrl":"https://doi.org/10.1080/01919512.2022.2052014","url":null,"abstract":"ABSTRACT Reactive capacity of ozone in respect of three representatives of the nitrogenous bases (1,3-dimethylthymine, 1,3,6-trimethyluracil, and 5-hydroxy-1,3,6-trimethyluracil) in two solvents having different polarities (Н2О and CCl4) was investigated with the help of the ultraviolet spectroscopy method. At the first stage of investigations, coefficients of extinction of 1,3-DMU in the selected solvents were determined. At the next stage, kinetics of absorption of ozone by solutions of 1,3-dimethyl-substituted uracils at room temperature (295°K) was studied with the help of the bubbling equipment. It was established that parent compounds (О3 and 1,3-DMU) react in the equimolar relationships, that is, 1 g-mol of the consumed uracil corresponds to 1 g-mol of the absorbed ozone. On the basis of the data on the stoichiometry and kinetics of consumption of the parent compounds, obvious and definitive conclusion was made: the reactions under investigation comply with the kinetic law of the second order (of the first order – in respect of О3 and of the first order – in respect of 1,3-DMU). In the course of further investigations, temperature (from 285°K up to 309°K) dependences of constants of velocities of the second order were investigated, as well as parameters of the Arrhenius equation in respect of reactions of ozone were determined. It was established that the reaction rate constants of reactions between ozone and 1,3-DMU within the medium of the nonpolar organic solvent (CCl4) exceed the reaction rate constants within the medium of the polar solvent (Н2О).","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"5 1","pages":"174 - 181"},"PeriodicalIF":2.7,"publicationDate":"2022-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81009135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toxicity Reduction of Microcystis Aeruginosa Using Microbubble Ozonation","authors":"Gwiwoong Nam, M. Jeon, Yoon-E Choi, Jinho Jung","doi":"10.1080/01919512.2022.2052013","DOIUrl":"https://doi.org/10.1080/01919512.2022.2052013","url":null,"abstract":"ABSTRACT The aim of this study was to investigate microbubble ozonation for the removal of toxic cyanobacteria, Microcystis aeruginosa. The microbubble ozonation (30 min) at 3.47 mg O3 L−1 decreased the M. aeruginosa concentration from 1.5 × 107 to 0.8 × 107 cell mL−1. However, the acute toxicity (48 h) to Daphnia magna (<24 h old) was considerably increased after the microbubble ozonation, possibly owing to the release of intracellular microcystins (MCs). Considering the release of toxic MCs, the microbubble ozonation was optimized at an environmentally relevant concentration (1.74 × 106 cell mL−1) of M. aeruginosa. Microbubble ozonation at 0.26–1.92 mg O3 L−1 for 30 min removed M. aeruginosa by 26 to 83% without any acute toxicity on D. magna. Moreover, D. magna feeding enhanced the removal rate from 85 to 100% for 48 h. These findings suggest that microbubble ozonation, possibly combined with D. magna biomanipulation, can be a promising tool to control toxic cyanobacteria in ambient water.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"182 1","pages":"182 - 190"},"PeriodicalIF":2.7,"publicationDate":"2022-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80339346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heterogeneous Catalytic Ozonation for Water Treatment: Preparation and Application of Catalyst","authors":"Zekun Yang, Haitao Yang, Y. Liu, Chaoquan Hu, Hailong Jing, Hongtao Li","doi":"10.1080/01919512.2022.2050183","DOIUrl":"https://doi.org/10.1080/01919512.2022.2050183","url":null,"abstract":"ABSTRACT Catalytic ozonation including homogeneous and heterogeneous ozonation has been extensively used in water and wastewater treatment in recent years. The liquid homogeneous catalysts cause secondary pollution and have limited development prospects. The heterogeneous catalyst exists in solid form, which is easy to separate solid from liquid, convenient to operate, and has high catalytic ozone decomposition efficiency. It can effectively mineralize organic pollutants and has great development potential. The catalyst is the core part of the whole method. In this study, the mechanism of heterogeneous catalytic ozone oxidation is briefly introduced. Several common preparation methods of ozone catalysts are reviewed. Various catalytic ozonation catalysts such as metal oxides, metals/metal oxides on supports, and carbon-based materials are summarized in detail. The application of heterogeneous catalytic ozonation in the degradation of phenols, pesticides, dyes, drugs, and other toxic organic pollutants is reviewed. At present, the structure of the catalyst is unstable, the active components of the catalyst are easily lost, and the catalytic effect is lost. Therefore, the development of supported catalysts with good stability has become the main direction of current research. The preparation and application of heterogeneous catalytic oxidation are also reviewed, which will be beneficial to further research.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"71 1","pages":"147 - 173"},"PeriodicalIF":2.7,"publicationDate":"2022-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83875068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Disinfecting Efficacy of an Ozonated Water Spray Chamber: Scientific Evidence of the Total and Partial Biocidal Effect on Personal Protective Equipment and in Vitro Analysis of a Viral Experimental Model","authors":"F. Oliveira, Laerte Marlon Conceição dos Santos, E. S. da Silva, Letícia de Alencar Pereira Rodrigues, Paulo Roberto Freitas Neves, Greta Almeida Fernandes Moreira, Gabriela Matheus Monteiro Lobato, Carlos Nascimento, Marcelo Gerhardt, Alex Álisson Bandeira Santos, Luís Alberto Brêda Mascarenhas, Bruna Aparecida Souza Machado","doi":"10.1080/01919512.2022.2040353","DOIUrl":"https://doi.org/10.1080/01919512.2022.2040353","url":null,"abstract":"ABSTRACT Due to the high recurrence of microbial infections, developing new technologies for preventing the dissemination of pathogens is essential, especially to prevent infection in humans. Thus, devices for the decontamination of surfaces reduce not only the spread of pathogens in the environment, but provide greater security and protection for communities. Ozone (O3) is a substance capable of reducing or eliminating several types of microorganisms owing to its biocidal capacity, including when it is dissolved in water. The objective of this study was to develop an instant decontamination device using ozonated water. To confirm its biocidal action and verify the device’s efficacy, the reduction of the microbial load of important pathogens on personal protective equipment (PPE) was assessed. In addition, in order to confirm the biocidal action of ozonated water against SARS-CoV-2, in vitro tests on a viral model of Gammacoronavirus were performed. The results showed the efficacy of ozonated water in the disinfection device at concentration ranges of 0.3–0.6 mg/L and 0.7–0.9 mg/L of ozonated water, with growth reductions above 2 log10 for both concentration ranges tested and inactivation fractions above 60% (0.3–0.6 mg/L) and 80% (0.7–0.9 mg/L), with a high proportion of the tested PPE showing 100% microbial reduction. In vitro results for the evaluation of ozonated water in a viral model showed a 99.9% reduction percentage in the concentration range of 0.3 to 0.5 mg/L and a 99% reduction in the concentration range of 0.6 to 0.8 mg/L, with a 5.10 log EDI50/mL and 6.95 log EDI50/mL reduction, respectively. The instant decontamination system developed in this study proved effective for microbial reduction, and we confirmed the potential of ozonated water as a biocidal agent. Therefore, the proposed decontamination device could be considered as a tool for reducing contamination on surfaces using ozonated water.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"69 1","pages":"111 - 129"},"PeriodicalIF":2.7,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90417988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variation of Ozone in the Pantanal Environment Based on Probability Distributions","authors":"Amaury de Souza, José Francisco Júnior, M. Abreu, F. Aristone, W. A. Fernandes, Raquel Soares Casaes Nunes, G. Cavazzana, Cícero Manoel dos Santos, Carlos José Reis, U. Dumka","doi":"10.1080/01919512.2022.2041392","DOIUrl":"https://doi.org/10.1080/01919512.2022.2041392","url":null,"abstract":"ABSTRACT The tropospheric ozone column (O3) plays a fundamental role in terrestrial life, particularly in climate variability, and protects the terrestrial biosphere from ultraviolet (UV) radiation. The study investigates the variation of the O3 concentration column in the Pantanal based on probability distributions. The adequacy of the Log Normal (LN), GUM (Gumbel) and GEV (Generalized Extreme Values) distributions were tested using the Kolmogorov-Smirnov (KS), D (Anderson-Darling), AIC (Akaike Information Criterion), BIC (Bayesian Information Criterion), R2(coefficient of determination) and RMSE (root mean square error) tests in the period from 2005 to 2020. In most months investigated, the Pantanal follows the GUM and GEV probability distributions. In addition, monthly means of O3 and standard deviations were calculated. It is worth mentioning the variability of O3 and the impact on climate change.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"46 1","pages":"130 - 146"},"PeriodicalIF":2.7,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90907946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reactive Black 5 Removal with Ozone on Lab-scale and Modeling","authors":"Bulent Sari, Hakan Güney, Selman Türkeş, Olcayto Keskinkan","doi":"10.1080/01919512.2022.2035211","DOIUrl":"https://doi.org/10.1080/01919512.2022.2035211","url":null,"abstract":"ABSTRACT This study investigates modeling the ozone removal of the Reactive Black 5 (RB5) dye from an aqueous solution using a combination of nonlinear regression (NLR), multiple linear regression (MLR), and Intrinsically multiple linear regression (IMLR) models. Lack of use and evaluation of the IMLR method in estimating RB5 removal by ozonation attract attention. Experimental data were used in the R Core Team software for the development of the models and estimate of RB5 removal by ozone. The effects of variables such as pH, contact time, initial dye concentration, and applied ozone dosage on RB5 removal by ozone were investigated. Maximum 92% RB5 removal rate was obtained at pH 8, 60 min contact time, 100 mg/L initial RB5 concentration, and applied ozone dosage of 66 mgO3/L. Under these conditions, the amount of specific ozone consumption was 0.678 gO3/gRB5. In order to compare the models, coefficient of determination (R2) and mean square error (MSE) were utilized as reliability and precision criteria. The best R2 and MSE values for the IMLR model were calculated as 0.8940 and 0.098, respectively. To determine the appropriate model and coefficients, analysis of variance (ANOVA), and t-test were used, respectively. Whether the model is within the confidence interval was determined by the significance value (p) and the variation was <5% for the IMLR model. As a result, it was found that the best method for modeling RB5 removal from aqueous solution by ozone was the IMLR method. Detailed explanations on results were introduced in the study.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"5 1","pages":"50 - 64"},"PeriodicalIF":2.7,"publicationDate":"2022-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83034579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantitative evaluation of the inactivation effect of ozonated water on SARS-CoV-2 based on corrected CT values","authors":"K. Nakamuro, Hirotaka Naitou, Y. Nishiki, Hideo Nakata, M. Kanai, J. Hirotsuji","doi":"10.1080/01919512.2022.2030636","DOIUrl":"https://doi.org/10.1080/01919512.2022.2030636","url":null,"abstract":"ABSTRACT There are many issues in the evaluation protocols based on CT (mg min/L) values, which have been used to assess the germicidal effect of highly oxidative and unstable ozonated water. The major problems include the carryover of culture medium components in virus inactivation assays and the reaction volume ratio between the virus suspension and ozonated water. Furthermore, it is essential to correct the CT value with the decay curve of dissolved ozone under the same conditions as the inactivation assay. In this study, these concerns were reexamined to obtain quantitative CT values. Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) inactivation test using ozonated water prepared from pure water was assessed by determining the corrected concentration time (CCT) values. Moreover, a possible inactivation mechanism of SARS-CoV-2 was discussed with the aid of findings from this study and previous reports. The findings revealed that the CCT value required for 99.95% inactivation of SARS-CoV-2 with ozonated water was 0.97 mg·min/L. To quantitatively evaluate the SARS-CoV-2 inactivation test, the virus purification procedure during the pretreatment and the CT value correction using a dissolved ozone decay curve obtained under the same condition as the inactivation test were demonstrated to be essential. We proposed a possible mechanism of SARS-CoV-2 inactivation with ozonated water. Amino acids such as tyrosine, tryptophan, methionine, cysteine, and histidine in the SARS-CoV-2 spike protein are susceptible to oxidative attack by the ozone dissolved in water. This attack may induce structural destruction of the spike protein and inhibit its binding to the angiotensin converting enzyme 2 (ACE2) receptor, an essential host receptor for viral infection, resulting in viral inactivation and contributing to infection suppression.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"21 1","pages":"148 - 156"},"PeriodicalIF":2.7,"publicationDate":"2022-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78448841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Macauba fruits preserved by combining drying and ozonation methods for biodiesel production","authors":"G. N. Silva, J. A. Saraiva-Grossi, M. S. Carvalho, L. Faroni, Osdnéia Pereira Lopes, M. S. Oliveira, D. R. S. Barbosa, Y. Silva","doi":"10.1080/01919512.2022.2031103","DOIUrl":"https://doi.org/10.1080/01919512.2022.2031103","url":null,"abstract":"ABSTRACT Macaúba (Acrocomia aculeata) is an oleaginous plant for use in biodiesel production. After harvest, the fruits of this palm tree have high water content, thus attracting microorganisms. Therefore, it is necessary to adopt appropriate fruit storage strategies to ensure oil quality. The objective of this study was to evaluate the effect of the combined use of drying and ozonation on the quality of macaúba fruit oil used to produce biodiesel. The fruits were dried at 60 °C and subsequently subjected to ozonation (treatments with different dosages and application intervals). The treatments with the combined use of drying and ozonation were efficient in maintaining FFA content below 5% for up to 45 days of storage. Furthermore, these treatments did not affect the oil content in the mesocarp of macauba fruits during 180 days of storage. Thus, the combined technique of drying and ozonation of macauba fruits without epicarps can become a viable alternative post-harvest.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"35 1","pages":"41 - 49"},"PeriodicalIF":2.7,"publicationDate":"2022-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81076215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Behavior of Phosphorus during Sewage Sludge Ozonation","authors":"Yanfang Liu, Wei Gao, Sijie Yin, X. Lou, Gong Li, Haoyun Liu, Zaixing Li","doi":"10.1080/01919512.2022.2035212","DOIUrl":"https://doi.org/10.1080/01919512.2022.2035212","url":null,"abstract":"ABSTRACT Since phosphorus (P) is a nonrenewable element essential for life, it is extremely important to understand its potential supply sources. This paper describes the behavior of P during the ozonation of waste activated sludge (WAS) as it is an important pool of P. Also, we investigated whether ozonation of WAS could be an effective method for both P recovery in solution and its bio- and plant-availability in solid residues based on the analysis by the Standards, Measurements, and Testing Program. The results showed that P was enriched in WAS at concentrations above 23 mg/g. Phosphorus transferred from the solid phase to the liquid phase, and the total P content in the liquid phase increased from 1.67 to 40.68 mg/L as the ozone dosage increased from 0 to 0.20 g O3/g MLSS. PO4 3–P was the main form of P in the liquid phase after ozonation, which is beneficial for P recovery. The P fraction analysis revealed that the released P mainly came from apatite P (AP) during ozonation. Additionally, P was more available in solid residues as the proportion of bio-available P (non-apatite inorganic P (NAIP) + organic P (OP)) improved from 73.6% in the raw WAS to 91.7% at an ozone dosage of 0.20 O3/g MLSS. In addition, the solid residues were suitable for plant availability at a moderate Fe/P ratio (0.91) after ozonation. Thus, ozonation is recommended as the preferable solution to achieve an advanced P supply in both the liquid phase and solid residues.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"133 1","pages":"65 - 74"},"PeriodicalIF":2.7,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86204261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linear Relationship between Temperature and the Apparent Reaction Rate Constant of Hydroxyl Radical with 4-chlorobenzoic Acid","authors":"Kohei Kawaguchi, Taira Hidaka, Fumitake Nishimura","doi":"10.1080/01919512.2021.2006561","DOIUrl":"https://doi.org/10.1080/01919512.2021.2006561","url":null,"abstract":"ABSTRACT 4-Chlorobenzoic acid (p-CBA) is frequently used as a hydroxyl radical (HO·) probe substance in studies of ozonation and advanced oxidation processes. However, the temperature dependence of the reaction between HO· and p-CBA remains unclear. In this context, we identified the relationship between temperature ( , K) and the apparent second-order reaction rate constant of HO· with p- CBA ( , M−1 s−1): . They were measured by a novel competitive method using 2-methylpropan-2-ol (tert-butyl alcohol) as a reference substance in the range of 1.0–40.0℃. The linear regression equation was more appropriate than the exponential regression equation to express this relationship. More generally, our simulation shows that the linear regression equation can be more accurate than the exponential regression equation to express the relationship between temperature and apparent reaction rate constants of HO.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"19 1","pages":"274 - 280"},"PeriodicalIF":2.7,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82921603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}