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https://www.readbyqxmd.com/read/28643515/structures-of-degradation-products-and-degradation-pathways-of-aflatoxin-b1-by-high-voltage-atmospheric-cold-plasma-hvacp-treatment
#1
Hu Shi, Bruce R Cooper, Richard L Stroshine, Klein E Ileleji, Kevin Keener
High voltage atmospheric cold plasma (HVACP) is a novel non-thermal decontamination technology that has potential for use in the food industry. In this study, HVACP was applied to treat pure aflatoxin B1 (AFB1) powder on a glass slide. AFB1 was degraded by 76% using a 5 min HVACP treatment in air having 40% relative humidity. The degradation products of AFB1 were separated and their molecular formulas were elucidated using liquid chromatography time of flight mass spectrometry (HPLC-TOF MS). Six main degradation products were observed...
June 23, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28640797/rural-and-urban-differences-in-air-quality-2008-2012-and-community-drinking-water-quality-2010-2015-united-states
#2
Heather Strosnider, Caitlin Kennedy, Michele Monti, Fuyuen Yip
PROBLEM/CONDITION: The places in which persons live, work, and play can contribute to the development of adverse health outcomes. Understanding the differences in risk factors in various environments can help to explain differences in the occurrence of these outcomes and can be used to develop public health programs, interventions, and policies. Efforts to characterize urban and rural differences have largely focused on social and demographic characteristics. A paucity of national standardized environmental data has hindered efforts to characterize differences in the physical aspects of urban and rural areas, such as air and water quality...
June 23, 2017: MMWR. Surveillance Summaries: Morbidity and Mortality Weekly Report. Surveillance Summaries
https://www.readbyqxmd.com/read/28633841/novel-approaches-based-on-ultrasound-for-treatment-of-wastewater-containing-potassium-ferrocyanide
#3
Rajashree H Jawale, Akash Tandale, Parag R Gogate
Industrial wastewaters containing biorefractory compounds like cyanide offer significant environmental problems attributed to the fact that the conventional methods have limited effectiveness and hence developing efficient treatment approaches is an important requirement. The present work investigates the use of novel treatment approach of ultrasound (US) combined with advanced oxidation techniques for the degradation of potassium ferrocyanide (KFC) for the first time. An ultrasonic bath equipped with longitudinal horn (1kW rated power and 25kHz frequency) has been used...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28628868/an-overview-on-exploration-and-environmental-impact-of-unconventional-gas-sources-and-treatment-options-for-produced-water
#4
REVIEW
Tânia L S Silva, Sergio Morales-Torres, Sérgio Castro-Silva, José L Figueiredo, Adrián M T Silva
Rising global energy demands associated to unbalanced allocation of water resources highlight the importance of water management solutions for the gas industry. Advanced drilling, completion and stimulation techniques for gas extraction, allow more economical access to unconventional gas reserves. This stimulated a shale gas revolution, besides tight gas and coalbed methane, also causing escalating water handling challenges in order to avoid a major impact on the environment. Hydraulic fracturing allied to horizontal drilling is gaining higher relevance in the exploration of unconventional gas reserves, but a large amount of wastewater (known as "produced water") is generated...
June 16, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28623000/medical-ozone-promotes-nrf2-phosphorylation-reducing-oxidative-stress-and-pro-inflammatory-cytokines-in-multiple-sclerosis-patients
#5
Livan Delgado-Roche, Mario Riera-Romo, Fernando Mesta, Yanet Hernández-Matos, Juan M Barrios, Gregorio Martínez-Sánchez, Said M Al-Dalaien
Oxidative stress and inflammation play key roles in the pathogenesis of Multiple sclerosis (MS). Different drugs have been used in the clinical practice, however, there is not a completely effective treatment. Due to its potential therapeutic action, medical ozone represents a promising approach for neurodegenerative disorders. The aim of the present study was to address the role of ozone therapy on the cellular redox state in MS patients. Ozone (20μg/ml) was administered three times per week during a month by rectal insufflation...
June 13, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28618717/the-electrical-properties-of-hybrid-composites-based-on-multiwall-carbon-nanotubes-with-graphite-nanoplatelets
#6
Yulia Perets, Lyudmila Aleksandrovych, Mykola Melnychenko, Oleksandra Lazarenko, Lyudmila Vovchenko, Lyudmila Matzui
In the present work, we have investigated the concentration dependences of electrical conductivity of monopolymer composites with graphite nanoplatelets or multiwall carbon nanotubes and hybrid composites with both multiwall carbon nanotubes and graphite nanoplatelets. The latter filler was added to given systems in content of 0.24 vol%. The content of multiwall carbon nanotubes is varied from 0.03 to 4 vol%. Before incorporation into the epoxy resin, the graphite nanoplatelets were subjected to ultraviolet ozone treatment for 20 min...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28614740/investigation-of-ozonation-kinetics-and-transformation-products-of-sucralose
#7
Ruikang Hu, Lifeng Zhang, Jiangyong Hu
Sucralose is one of widely used artificial sweeteners, which has been ubiquitously detected in various water sources, such as wastewater and randomly in reservoir water. It is also reported to be persistent to various water treatment techniques. Although there are some studies on removal of sucralose by advanced oxidation process, limited information, in terms of reaction kinetics, transformation products and degradation pathway etc., was reported in its ozonation process. In this study, the reaction kinetics, removal efficiency, influence of pH, humic acid and carbonate on sucralose degradation by ozone, have been studied systematically...
June 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28614602/uv-ozone-interfacial-modification-in-organic-transistors-for-high-sensitivity-no2-detection
#8
Wei Huang, Xinming Zhuang, Ferdinand S Melkonyan, Binghao Wang, Li Zeng, Gang Wang, Shijiao Han, Michael J Bedzyk, Junsheng Yu, Tobin J Marks, Antonio Facchetti
A new type of nitrogen dioxide (NO2 ) gas sensor based on copper phthalocyanine (CuPc) thin film transistors (TFTs) with a simple, low-cost UV-ozone (UVO)-treated polymeric gate dielectric is reported here. The NO2 sensitivity of these TFTs with the dielectric surface UVO treatment is ≈400× greater for [NO2 ] = 30 ppm than for those without UVO treatment. Importantly, the sensitivity is ≈50× greater for [NO2 ] = 1 ppm with the UVO-treated TFTs, and a limit of detection of ≈400 ppb is achieved with this sensing platform...
June 14, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28614539/effects-of-ozone-on-the-pain-and-disability-in-patients-with-failed-back-surgery-syndrome
#9
Danilo Costa Barbosa, Jairo Silva Dos Ângelos, Gleica Maria Josino de Macena, Francisco Nêuton de Oliveira Magalhães, Erich Talamoni Fonoff
Introduction: Low back pain is one of the painful disorders of higher prevalence. It has several etiologies and surgery may be indicated in the presence of neurological deficits or compression syndromes. However, in up to 40% of cases, patients develop worsening of pain and failed back surgery syndrome (FBSS), which is an important cause of chronic pain with high morbidity and disability. In the last two decades, ozone has been shown to be a new therapeutic option for FBSS due to its analgesic and anti-inflammatory properties...
April 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/28613825/uv-sintered-low-temperature-solution-processed-sno2-as-robust-electron-transport-layer-for-efficient-planar-heterojunction-perovskite-solar-cells
#10
Like Huang, Xiaoxiang Sun, Chang Li, Jie Xu, Rui Xu, Yangyang Du, Jian Ni, Hongkun Cai, Juan Li, Ziyang Hu, Jianjun Zhang
Recently, low-temperature solution-processed tin oxide (SnO2) as versatile electron transport layer (ETL) for efficient and robust planar heterojunction (PH) perovskite solar cells (PSCs) has attracted particular attention due to its outstanding properties such as high optical transparency, high electron mobility, and suitable band alignment. However, for most of the reported works, an annealing temperature of 180 °C is generally required. This temperature can reluctantly said to be a low temperature, especially with respect to the flexible application where 180 °C is still a little too high that PET flexible substrate cannot bear...
June 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28612399/postharvest-gaseous-ozone-treatment-enhances-quality-parameters-and-delays-softening-in-cantaloupe-melon-during-storage-at-6%C3%A2-%C3%A2-c
#11
Mauro Toti, Cristian Carboni, Rinaldo Botondi
BACKGROUND: This trial shows postharvest gaseous ozone treatment to evaluate the quality parameters and cell wall enzymes during the Cantaloupe melon cv Caldeo storage at 6 °C for 13 days. RESULTS: The fruits were kept in cold storage and treated with 0.15 ppm gaseous ozone during the day and 0.3 ppm overnight; the control fruits (CK) are stored in normal atmosphere. The firmness was higher and ethylene concentration was significantly lower on treated fruits compared to CK (untreated)...
June 14, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28610734/impact-of-post-harvest-ozone-treatments-on-the-skin-phenolic-extractability-of-red-winegrapes-cv-barbera-and-nebbiolo-vitis-vinifera-l
#12
Maria Alessandra Paissoni, Susana Río Segade, Simone Giacosa, Fabrizio Torchio, Francesco Cravero, Vasileios Englezos, Kalliopi Rantsiou, Cristian Carboni, Vincenzo Gerbi, Pierre-Louis Teissedre, Luca Rolle
Recently the use of ozone as sanitizing agent has been proposed on winegrapes in order to control mycobiota after harvest. The aim of this work was to investigate possible indirect physico-chemical effects of ozone treatment on berry skin phenolic composition and extractability. Vitis vinifera L. cv Nebbiolo and Barbera, chosen for their different anthocyanin profiles, were post-harvest treated for 24 and 72h with gaseous ozone (30μL/L). Skin anthocyanin and flavanol extractability was assessed during maceration (6, 24, 48, 96, 168 and 240h) using a wine-like solution...
August 2017: Food Research International
https://www.readbyqxmd.com/read/28609731/degradation-of-sulfamethoxazole-using-ozone-and-chlorine-dioxide-compound-specific-stable-isotope-analysis-transformation-product-analysis-and-mechanistic-aspects
#13
Sarah Willach, Holger V Lutze, Kevin Eckey, Katja Löppenberg, Michelle Lüling, Jens Terhalle, Jens-Benjamin Wolbert, Maik A Jochmann, Uwe Karst, Torsten C Schmidt
The sulfonamide antibiotic sulfamethoxazole (SMX) is a widely detected micropollutant in surface and groundwaters. Oxidative treatment with e.g. ozone or chlorine dioxide is regularly applied for disinfection purposes at the same time exhibiting a high potential for removal of micropollutants. Especially for nitrogen containing compounds such as SMX, the related reaction mechanisms are largely unknown. In this study, we systematically investigated reaction stoichiometry, product formation and reaction mechanisms in reactions of SMX with ozone and chlorine dioxide...
June 3, 2017: Water Research
https://www.readbyqxmd.com/read/28609729/reliability-of-pathogen-control-in-direct-potable-reuse-performance-evaluation-and-qmra-of-a-full-scale-1-mgd-advanced-treatment-train
#14
Brian M Pecson, Sarah C Triolo, Simon Olivieri, Elise C Chen, Aleksey N Pisarenko, Chao-Chun Yang, Adam Olivieri, Charles N Haas, R Shane Trussell, R Rhodes Trussell
To safely progress toward direct potable reuse (DPR), it is essential to ensure that DPR systems can provide public health protection equivalent to or greater than that of conventional drinking water sources. This study collected data over a one-year period from a full-scale DPR demonstration facility, and used both performance distribution functions (PDFs) and quantitative microbial risk assessment (QMRA) to define and evaluate the reliability of the advanced water treatment facility (AWTF). The AWTF's ability to control enterovirus, Giardia, and Cryptosporidium was characterized using online monitoring of surrogates in a treatment train consisting of ozone, biological activated carbon, microfiltration, reverse osmosis, and ultraviolet light with an advanced oxidation process...
June 6, 2017: Water Research
https://www.readbyqxmd.com/read/28605842/suspect-screening-of-micropollutants-and-their-transformation-products-in-advanced-wastewater-treatment
#15
Ahmad A Deeb, Susanne Stephan, Oliver J Schmitz, Torsten C Schmidt
Transformation products (TPs) of organic micropollutants are still rarely considered in monitoring of wastewater and aquatic environments. For example, occurrence data of ozonated TPs in full-scale wastewater systems is largely lacking. In this study, the efficiency of a suspect screening strategy including 245 previously reported compounds and their TPs was evaluated for assessing the occurrence of different compound classes and their ozonated TPs in wastewater samples collected at different steps of an advanced treatment process including ozonation...
June 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28602002/enhanced-removal-of-ethanolamine-from-secondary-system-of-nuclear-power-plant-wastewater-by-novel-hybrid-nano-zero-valent-iron-and-pressurized-ozone-initiated-oxidation-process
#16
Son Dong Lee, Srinivasa Reddy Mallampati, Byoung Ho Lee
Monoethanolamine (shortly ethanolamine (ETA)), usually used as a corrosion inhibitor, is a contaminant of wastewater from the secondary cooling system of nuclear power plants (NPPs) and is not readily biodegradable. We conducted various experiments, including treatments with nano zero-valent iron (nZVI), nano-iron/calcium, and calcium oxide (nFe/Ca/CaO) with ozone (O3) or hydrogen peroxide (H2O2) to reduce the concentration of ETA and to decrease the chemical demand of oxygen (COD) of these wastewaters. During this study, wastewater with ETA concentration of 7465 mg L(-1) and COD of 6920 mg L(-1) was used...
June 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28601791/effect-of-operational-and-water-quality-parameters-on-conventional-ozonation-and-the-advanced-oxidation-process-o3-h2o2-kinetics-of-micropollutant-abatement-transformation-product-and-bromate-formation-in-a-surface-water
#17
Marc Bourgin, Ewa Borowska, Jakob Helbing, Juliane Hollender, Hans-Peter Kaiser, Cornelia Kienle, Christa S McArdell, Eszter Simon, Urs von Gunten
The efficiency of ozone-based processes under various conditions was studied for the treatment of a surface water (Lake Zürich water, Switzerland) spiked with 19 micropollutants (pharmaceuticals, pesticides, industrial chemical, X-ray contrast medium, sweetener) each at 1 μg L(-1). Two pilot-scale ozonation reactors (4-5 m(3) h(-1)), a 4-chamber reactor and a tubular reactor, were investigated by either conventional ozonation and/or the advanced oxidation process (AOP) O3/H2O2. The effects of selected operational parameters, such as ozone dose (0...
May 11, 2017: Water Research
https://www.readbyqxmd.com/read/28601007/distribution-and-relevance-of-iodinated-x-ray-contrast-media-and-iodinated-trihalomethanes-in-an-aquatic-environment
#18
Zhifa Xu, Xia Li, Xialin Hu, Daqiang Yin
Distribution and relevance of iodinated X-ray contrast media (ICM) and iodinated disinfection byproducts (I-DBPs) in a real aquatic environment have been rarely documented. In this paper, some ICM were proven to be strongly correlated with I-DBPs through investigation of five ICM and five iodinated trihalomethanes (I-THMs) in surface water and two drinking water treatment plants (DWTPs) of the Yangtze River Delta, China. The total ICM concentrations in Taihu Lake and the Huangpu River ranged from 88.7 to 131 ng L(-1) and 102-252 ng L(-1), respectively...
June 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/28599162/performance-characterization-and-kinetic-modeling-of-ozonation-using-a-new-method-roh-o3-concept
#19
Minhwan Kwon, Homin Kye, Youmi Jung, Yeojoon Yoon, Joon-Wun Kang
Ozonation is an effective treatment for removing various organic pollutants from aquatic systems. The Rct concept, which is defined as the ratio of OH exposure to O3 exposure, has been widely used to predict the removal efficiency of target compounds, but it has significant variations by water temperature and initial O3 dose which are crucial parameters in drinking water plant. The ROH,O3 concept, which is defined as the OH exposure by O3 consumption, was proposed as a kinetic parameter for characterization and kinetic modeling for ozonation...
May 31, 2017: Water Research
https://www.readbyqxmd.com/read/28598181/a-new-method-for-deep-caries-treatment-in-primary-teeth-using-ozone-a-retrospective-study
#20
M Beretta, F Federici Canova
AIM: The aim of this study was to assess the effectiveness of a new protocol for deep caries treatment in deciduous teeth based on: 1) the incomplete removal of carious dentin tissue; 2) the use of new technology (ozone) for the disinfection of carious dentine; 3) the creation of a peripheral seal in healthy tissue for bonding procedures with rubber dam isolation. MATERIALS AND METHODS: From a personal database, authors selected 50 consecutive patients (28 males, 22 females; mean age 5...
June 2017: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
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