Ozone: Science & Engineering最新文献

{"title":"Impact of Ozonated Water on Brown Rot Development and Storage Potential of Nectarine and Plum","authors":"P. Drogoudi, G. Pantelidis, T. Thomidis","doi":"10.1080/01919512.2022.2153645","DOIUrl":"https://doi.org/10.1080/01919512.2022.2153645","url":null,"abstract":"ABSTRACT Postharvest fruit rot is one of the most serious diseases of fleshy stone fruits such as nectarine and plum. The efficacy of ozonated water sprayed in different doses in a packing line [low dose, 1.5 ppm ozone (Ο3) for 100 sec; medium dose, 3.0 ppm Ο3 for 100 sec; high dose, 1.5 ppm Ο3 for 400 sec] in controlling the brown rot (Monilinia fructicola) development was studied in the nectarine cultivar ‘Τasty Free’ and the plum cultivar ‘Angelino.’ Changes in flesh firmness, ripening index, ethylene and respiration rate, and peel color during storage (0℃ for 3 weeks) and shelf-life (20℃ for 4 days) were used as ‘indicator’ quality parameter responses in storage and shelf-life. The most efficient dose of O3 in controlling the Monilinia infection was the highest applied, followed by the middle O3 dose. The efficacy of O3 treatments was higher when a lower Monilinia spore concentration was applied. The O3 doses applied did not cause any visible symptoms of O3 toxicity, yet they caused an acceleration in the fruit ripening process, suggested mainly by an increase in the fruit respiration rate in both nectarine and plum, and an increase in the ripening index and darker peel coloration only in plums. In conclusion, spraying with ozonated water is an eco-friendly and efficient sanitizing agent, but in fleshy commodities such as nectarine and plum may diminish their postharvest performance.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"45 1","pages":"410 - 418"},"PeriodicalIF":2.7,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79212520","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":"Nanometric Systems Containing Ozonated Oil with Potential Activity against Skin Pathogens","authors":"Kiany de Oliveira Firmino, Francielli Lima dos Santos, M. S. Marques, Bárbara Souza da Costa, G. D. S. Collar, J. Caierão, A. Fuentefria, Irene Clemes Külkamp Guerreiro, R. V. Contri","doi":"10.1080/01919512.2022.2125362","DOIUrl":"https://doi.org/10.1080/01919512.2022.2125362","url":null,"abstract":"ABSTRACT Some antimicrobial substances have unwanted side effects, besides difficulty in crossing the stratum corneum, prompting the need to search for alternative treatments. Ozonated vegetable oils present activity against some fungi and bacteria. This study has aimed to develop and characterize nanoemulsions and polymeric nanocapsules containing 5% ozonated sunflower seed oil for skin application with potential activity against skin pathogens. The formulations were obtained by interfacial deposition of preformed polymer (polymeric nanocapsules) and emulsification followed by Ultra-Turrax® agitation (nanoemulsion). The nanometric systems were evaluated in terms of their organoleptic and physicochemical properties, as well as ozonides presence. The stability of the systems was analyzed by centrifugation (pre-stability) and after 30 days in oven (40 °C) and refrigerator (4 °C) conditions. The antimicrobial activity was determined in vitro using dermatophytes, Candida and Staphylococcus species. Both formulations appeared white and homogeneous, with typical ozonated oil odor. The mean diameters and pH values were, respectively, 139 ± 7.6 nm and 3.2 ± 0.1 for the nanoemulsion and 149 ± 6.1 nm and 3.3 ± 0.2 for the polymeric nanocapsules. Zeta potential was −9 mV (nanoemulsion) and +11 mV (polymeric nanocapsules). The presence of ozonides was confirmed by FT-IR and the nanometric systems were considered stable. Susceptibility tests showed greater potential for the nanometric systems containing ozonated oil against fungi, especially dermatophytes. It was possible to increase the antimicrobial efficacy of the ozonated oil for eighteen of the twenty pathogen isolates tested. Thus, the developed nanometric systems containing ozonated oil may be considered potential treatments for skin infections.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"10 1","pages":"398 - 409"},"PeriodicalIF":2.7,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75333322","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":"Using Ti/Ti0.7Ru0.3O2 anode-type with a Flow Cell System for the Electrochemical Treatment of a Tannery Wastewater","authors":"A. Baddouh, B. El Ibrahimi, E. Amaterz, R. Oukhrib, L. Bazzi","doi":"10.1080/01919512.2022.2124953","DOIUrl":"https://doi.org/10.1080/01919512.2022.2124953","url":null,"abstract":"ABSTRACT The electrochemical oxidation of a real wastewater discharged by the baths of “Dar Dbagh” tannery (DDT) in Fez city (Morocco) was performed using Ti/Ti0.7Ru0.3O2 anode (a dimensionally stable anode (DSA)-type electrode) underflow condition. The effect of different operational parameters, namely chloride ions concentration, electrolysis time, current density, initial pH, and temperature has been studied in detail. The discoloration and chemical oxygen demand (COD) removal have been taken as the key experimental indicators to monitor the electrochemical treatment process of DDT wastewater. The obtained results have shown that the best degradation rates (i.e., 100% and 56% of de-colorization and COD removal, respectively) were accomplished under acidic conditions at 20 mA cm−2 as a current density in the presence of 0.033 M Na2SO4 + 0.800 M NaCl as supporting electrolyte at room temperature. The maximum reduction of the effluent COD attained using Ti/Ti0.7Ru0.3O2 anode consuming 39.24 kWh per m3 clearly shows that DSA electrodes could be a good alternative for the remediation of DDT effluents.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"126 1","pages":"374 - 386"},"PeriodicalIF":2.7,"publicationDate":"2022-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73246845","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":"Therapeutic Effects and Uses of Ozone in Dentistry: A Systematic Review","authors":"S. Liaqat, Samia Tariq, Irum Hayat, Bakhtawar Mobeen, Sarmad Fayyaz, Humaira Jabeen, S. Khalid, Nawshad Muhammad, M. A. Khan","doi":"10.1080/01919512.2022.2125363","DOIUrl":"https://doi.org/10.1080/01919512.2022.2125363","url":null,"abstract":"ABSTRACT As antibiotic resistance is increasing daily, the desire to treat an infection without causing any harmful effects assumes increasing importance. Ozone gas is a reactive antioxidant. Its role in blood circulation and uplifting immunity is an ideal complement to achieving curative care treatments. Aside from treatments, the therapeutic and biological effects of ozone may have positive results by reducing tooth demineralization, its antimicrobial capabilities rely upon its ability to oxidize, which produces free radicals, and has immediate action on microbes. The usage of ozone in dentistry is recommended for a variety of purposes, which comprises carious lesion treatments, root canal disinfection, post-surgical treatment, tooth bleaching, periodontal problems, prosthodontics, and orthodontics. Ozone has the potential to be a promising alternative therapy in dentistry. However, well-designed research is needed to analyze ozone’s utilization in the field of dentistry to determine its importance from a clinical perspective so that the general public can benefit from it. This systematic review aims to describe the technique in which ozone can be advantageous as well as the many ways of applications of ozone therapy in dentistry.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"21 1","pages":"387 - 397"},"PeriodicalIF":2.7,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85170845","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":"Estimation of Hydroxyl Radical Exposure in a three-stage Countercurrent Ozone Contactor – Reduction in Musty Odor Compounds and Formation of Bromate","authors":"Kyohei Uchigami, Hideyasu Nakamura, Kazuo Ogura, T. Mizuno","doi":"10.1080/01919512.2022.2117131","DOIUrl":"https://doi.org/10.1080/01919512.2022.2117131","url":null,"abstract":"ABSTRACT The Hanshin Water Supply Authority is the first bulk water supplier in Japan that currently operates two drinking water treatment plants. Both plants employ an ozonation process for the reduction of musty odor compounds, 2-methylisoborneol and geosmin, and trihalomethanes. In this study, we aim to estimate hydroxyl radical (HO∙) exposure in a three-stage countercurrent ozone contactor applied at the Inagawa drinking water treatment plant. We estimated the HO∙ exposure as the product of the ozone exposure multiplied by the RCt value, that is, the ratio of the HO∙ exposure to the ozone exposure. The ozone exposure was estimated by a methodology we developed earlier, and the RCt values were experimentally evaluated in this study. The estimated HO∙ exposure ranged from 0.4 × 10−10 to 6.7 × 10−10 M·s across the contactor during our research period. The highest HO∙ exposure of 6.7 × 10−10 M·s indicated that the reduction ratio of musty odor compounds exceeded 95%. At these exposures, the detected concentration of bromate was 6 µg/L, which is equal to the 60% concentration level of Japan’s water quality standard for drinking water. Further, we attempt to balance the reduction in musty odor compounds with control of bromate formation.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"25 1","pages":"191 - 201"},"PeriodicalIF":2.7,"publicationDate":"2022-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83235504","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":"Ozone: Both Mature and New","authors":"Barry L. Loeb","doi":"10.1080/01919512.2022.2110734","DOIUrl":"https://doi.org/10.1080/01919512.2022.2110734","url":null,"abstract":"There are those who state that ozone is now a mature technology. This impression is most likely based on the well-established use of ozone for drinking water purification. Ozone is very effective in improving taste and odor, helping to eliminate the formation of trihalomethanes, provide disinfection and help filtration performance. Ozone has been used for disinfection of drinking water for large municipalities for more than 50 years. This is definitely mature technology. However, even with drinking water treatment, there have been new developments with ozone, particularly when considering ozone mass transfer. Historically water treatment plants used porous plate diffusers and many still do today. In the interest of saving space and reducing capital, operational and maintenance costs, sidestream venturi injectors (SVIs) have been developed to introduce ozone into water. Over the past several years this process has been optimized using computational fluid dynamics to help in determine the optimum injection nozzle locations for a particular process. Today, a large percentage of new drinking waters are using SVIs. Another significant advance has been the use of static mixers to improve the ozone dissolution. Many remember the old air-fed ozone generators equipped with elaborate air-drying systems. These were the original workhorse generators of the ozone industry. Engineers and scientists have since developed new power conversion technologies and dielectrics tailored to oxygen feed gas resulting in considerable improvement in efficiency and reduction of space. We continue to see incremental improvement in ozone generator performance and the use of very reliable efficient power conversion equipment. Scientists are now demonstrating how a Xenon Excimer can be used to produce very high concentration ozone at an economical power consumption. In the early days of ozone, scientists discovered advanced oxidation where ozone combined with hydrogen peroxide formed free radicals which could quickly oxidize difficult contaminants. This led to the concept of catalytic ozonation where ozone combined with a solid catalyst could provide a similar benefit. This new technology is being heavily researched and may soon lead to commercial processes. Ozone was considered and used for wastewater treatment in the 1980s but fell out of favor due to operating costs and possibly misapplication. Today, there is emphasis on water reuse – reclaiming wastewater for use as potable water. Ozone combined with biological filtration has been found to be an newly effective process to accomplish this, particularly in areas where concentrate from reverse osmosis/ultrafiltration plants cannot be effectively disposed. IN 1997 the FDA approved ozone as GRAS for foods. In 2001 ozone was approved as an antimicrobial additive for direct contact with foods. Research on how to apply this newly approved technology began in earnest and continues today and ozone is tested on new food products for i","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"24 1","pages":"413 - 413"},"PeriodicalIF":2.7,"publicationDate":"2022-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80150660","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":"Bromate Removal from Water Using Ion Exchange Resin: Batch and Fixed Bed Column Performance","authors":"Safal Mestri, Sedar Dogan, C. Tizaoui","doi":"10.1080/01919512.2022.2114420","DOIUrl":"https://doi.org/10.1080/01919512.2022.2114420","url":null,"abstract":"ABSTRACT In this study, the removal of bromate, a regulated ozone by-product, was evaluated using a strong-base anion (SBA) exchange resin in batch and column experiments. The kinetics studies in batch mode showed that film diffusion-controlled bromate exchange in SBA and the isotherm studies showed that the Langmuir model fitted the experimental results with a maximum exchange capacity of 296.66 mg BrO3 −/g (~1.3 meq/mL resin). In the fixed-bed column studies, breakthrough curves were obtained under different operating conditions to examine the effects of feed flow rate, inlet bromate concentration, and bed height on column performance. A modified n-order Bohart and Adams model (n-BAM-c), which considered the asymmetry of the breakthrough curve and flow channeling, was applied for the first time to describe the experimental data obtained from the column and to predict the breakthrough curves. It was found that n-BAM-c fitted the experimental data well (R2 > 0.99) and the effects of the key operating conditions on the model parameters were determined. Overall, the results show that SBA exchange is suitable for bromate removal from water and n-BAM-c could be a powerful tool for the design and upscaling of bromate ion exchange columns.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"46 1","pages":"291 - 304"},"PeriodicalIF":2.7,"publicationDate":"2022-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86595717","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":"Effect of Ozone on Bond Strength of Different Restorative Materials to Enamel and Dentin","authors":"Gül DİNÇ ATA, A. Mujdeci","doi":"10.1080/01919512.2022.2115976","DOIUrl":"https://doi.org/10.1080/01919512.2022.2115976","url":null,"abstract":"ABSTRACT The aim of this study is to examine the effects of ozone treatment applied at two different times, followed by the in vitro application of a reductant solution, on the shear bond strength of four different restorative materials to enamel and dentin. A total of 400 caries-free human molar teeth were randomly divided into enamel and dentin groups, and each was divided into five subgroups. The O20 group received 20-s ozone, O20 + R received 20-s ozone+reductant solution, O80 received 80-s ozone, O80 + R received 80-s ozone+reductant solution, and C was the control group. Each subgroup was then divided into four more subgroups based on restorative material (i.e., nanohybrid resin composite, silorane-based microhybrid resin composite, compomer, or conventional capsulated glass ionomer cement). After water storage for seven days, shear bond-strength data (MPa) were measured using a universal testing machine at a crosshead speed of 0.5 mm/min until fracture, and failure types were examined. The effects of ozone and ozone+reductant applications on enamel and dentin were examined via scanning electron microscopy (SEM). Bond strength data were statistically evaluated using a three-way analysis of variance and Tukey’s honestly significant difference test (a = 0.05). The bond strength of the control group was like that of the O20 group (p > 0.05), but it was higher than all other groups regardless of the type of restorative material or tooth structure (p < 0.05). Adhesive-type failures were found in most groups. Via SEM examinations, it was observed that ozone applications did not change the enamel morphology, but they did cause narrowing of the dentinal tubule openings in O80 + R.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"3 1","pages":"89 - 101"},"PeriodicalIF":2.7,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78807731","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":"Removal of a Contaminant of Emerging Concern by Heterogeneous Catalytic Ozonation Process with a Novel Nano Bimetallic Catalyst Embedded on Activated Carbon","authors":"Hariprasad Pokkiladathu, Salman Farissi, A. Muthukumar, Muthukumar Muthuchamy","doi":"10.1080/01919512.2022.2114419","DOIUrl":"https://doi.org/10.1080/01919512.2022.2114419","url":null,"abstract":"ABSTRACT Organic contaminants such as Bisphenol A are classified as Contaminants of Emerging Concern (CECs). The inability of conventional water and wastewater treatments to remove CECs has made Advanced Oxidation Processes (AOPs) attractive for their removal from water sources. Oxidation species such as hydroxyl radicals are produced by AOPs that degrades and mineralize CECs found in water and wastewater. The present study focuses on using heterogeneous nano-metallic oxide embedded activated carbon (AC) for degrading Bisphenol-A (BPA) present in the water. The catalytic ozonation process was carried out using AC/Cu2O/ZnO as the catalyst. The bimetallic catalyst was characterized using BET, XRD, FESEM, Raman Spectra, and DLS. Total organic carbon (TOC) removal was 19% higher for catalytic ozonation when compared with non-catalytic ozonation. HPLC studies found that BPA was removed by 98%. The optimal conditions for degradation were 650 µg/L, pH 8 and 60 minutes. LC-MS/LC-Q-TOF was utilized to find the degradation pathway.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"14 1","pages":"361 - 373"},"PeriodicalIF":2.7,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73094980","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":"Efficient Dye Removal Using Fe3O4.MnO2.MoS2 Nanocomposite in Optimized Photocatalytic Ozonation Process","authors":"Seyed Mehdi Pourmoheb Hosseini, N. Chaibakhsh","doi":"10.1080/01919512.2022.2109590","DOIUrl":"https://doi.org/10.1080/01919512.2022.2109590","url":null,"abstract":"ABSTRACT In this study, Fe3O4.MnO2.MoS2 nanocatalyst has been fabricated for the first time and applied in the photocatalytic ozonation (PCO) process. The efficiency of this ternary heterostructure nanocomposite was evaluated in the removal of Acid Blue 113 (AB113) dye with 100 mg.L−1 concentration utilizing response surface methodology (RSM). The optimal condition of the process was attained at pH = 3, using 2 mg of the nanocatalyst and 300 mg.L−1 ozone dosage applied over 20 min. High efficiency of AB113 removal (99%) was observed at the optimal condition. In addition, the performance of the synthesized catalyst in the PCO process was investigated in the treatment of a real textile effluent sample. The PCO has been found to be more efficient than the individual photocatalysis and catalytic ozonation methods due to the synergistic effect between the two oxidation systems. The results proved that Fe3O4.MnO2.MoS2 can be used as a highly efficient catalyst in the PCO process.","PeriodicalId":19580,"journal":{"name":"Ozone: Science & Engineering","volume":"8 1","pages":"346 - 360"},"PeriodicalIF":2.7,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79737363","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}