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ozone treatment

Wenbo Jiang, Yingying Chen, Bai Li, Shuying Gao
Dibromoacetic acid (DBA), a by-product of disinfection, develops in drinking water during chlorination or ozonation processes. Water intake is the main source of DBA exposure in humans, which is potentially neurotoxic. The present study investigated the neurotoxic effects of DBA by assessing the behavioral and biochemical characteristics of Sprague Dawley rats intragastrically treated with DBA at concentrations of 20, 50 and 125 mg kg(-1) body weight for 28 consecutive days. The results indicated that animal weight gain and food consumption were not significantly affected by DBA...
July 21, 2017: Molecular BioSystems
Wen-Jun Luo, Fan Yang, Fei Yang, Wei Sun, Wei Zheng, Xiao-Liang Wang, Fang-Fang Wu, Jiang-Lin Wang, Jia-Shuang Wang, Su-Min Guan, Jun Chen
BACKGROUND: In a 5-year follow-up study in a hospital in southern China, it was shown that intervertebral foramen (IVF) injection of ozone at the involved segmental levels could significantly alleviate paroxysmal spontaneous pain and mechanical allodynia in patients with chronic, intractable postherpetic neuralgia (PHN) and improve the quality of life. However, so far no proof-of-concept studies in animals have been available. OBJECTIVE: This study was designed to investigate whether IVF ozone has an analgesic effect on animal models of neuropathic and inflammatory pain...
July 2017: Pain Physician
Yingdong Xia, Yufeng Pan, Haijuan Zhang, Jian Qiu, Yiting Zheng, YongHua Chen, Wei Huang
Hole extraction layer has significant impact on achieving high-efficiency polymer solar cells (PSCs). Here, we report an efficient approach to by direct UV-Ozone treatment larger device performance enhancement employing grapheme oxide (GO). The dramatically performance enhancement of PSCs with P3HT:PCBM blend as an active layer was demonstrated by UV-Ozone treated GO for 30 min: best PCE of 4.18%, FF of 0.63, Jsc of 10.94 mA cm-2, and Voc of 0.61 V, which is significantly higher than the untreated GO (1.82%) and highly comparable PEDOT:PSS-based PSCs (3...
July 18, 2017: ACS Applied Materials & Interfaces
Malin C Broberg, Johan Uddling, Gina Mills, Håkan Pleijel
Inefficient use of fertilizers by crops increases the risk of nutrient leaching from agro-ecosystems, resulting in economic loss and environmental contamination. We investigated how ground-level ozone affects the efficiency by which wheat used applied nitrogen (N) fertilizer to produce grain protein (NEP, N efficiency with respect to protein yield) and grain yield (NEY, N efficiency with respect to grain yield) across a large number of open-top chamber field experiments. Our results show significant negative ozone effects on NEP and NEY, both for a larger data set obtained from data mining (21 experiments, 70 treatments), and a subset of data for which stomatal ozone flux estimates were available (7 experiments, 22 treatments)...
July 13, 2017: Science of the Total Environment
Michael Chys, Kristof Demeestere, Ange Sabine Ingabire, Jan Dries, Herman Van Langenhove, Stijn W H Van Hulle
Ozonation and three (biological) filtration techniques (trickling filtration (TF), slow sand filtration (SSF) and biological activated carbon (BAC) filtration) have been evaluated in different combinations as tertiary treatment for municipal wastewater effluent. The removal of 18 multi-class pharmaceuticals, as model trace organic contaminants (TrOCs), has been studied. (Biological) activated carbon filtration could reduce the amount of TrOCs significantly (>99%) but is cost-intensive for full-scale applications...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Fernando J Beltrán, Ana Rey
An incipient advanced oxidation process, solar photocatalytic ozonation (SPO), is reviewed in this paper with the aim of clarifying the importance of this process as a more sustainable water technology to remove priority or emerging contaminants from water. The synergism between ozonation and photocatalytic oxidation is well known to increase the oxidation rate of water contaminants, but this has mainly been studied in photocatalytic ozonation systems with lamps of different radiation wavelength, especially of ultraviolet nature (UVC, UVB, UVA)...
July 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Sıdıka Sinem Akdeniz, E Beyler, Y Korkmaz, E Yurtcu, U Ates, K Araz, F I Sahin, O Y Torun
OBJECTIVES: Medication-related osteonecrosis of the jaws (MRONJ) is an extremely therapy-resistant disease involving the jaws especially following bisphosphonate treatment. Bisphosphonates accumulate in bone in concentrations sufficient to be directly toxic to the oral epithelium. Current therapeutic options are inadequate for the prevention and treatment of MRONJ. The aim of this study was to investigate effects of ozone gas plasma therapy on wound healing in bisphosphonate-applied human fibroblasts...
July 11, 2017: Clinical Oral Investigations
Martynas Tichonovas, Edvinas Krugly, Arturas Grybauskas, Dalia Jankūnaitė, Viktoras Račys, Dainius Martuzevičius
The paper presents a study on the treatment of the furniture industry wastewater in a bench scale advanced oxidation reactor. The researched technology utilized a simultaneous application of ozone, ultraviolet radiation, and surface-immobilized TiO2 nanoparticle catalyst. Various combinations of processes were tested, including photolysis, photocatalysis, ozonation, catalytic ozonation, photolytic ozonation and photocatalytic ozonation was tested against the efficiency of degradation. The efficiency of the processes was primarily characterized by the TOC analysis, indicating the remaining organic material in the wastewater after the treatment, while the toxicity changes in wastewater were researched by Daphnia Magna toxicity tests...
July 7, 2017: Environmental Technology
Xin Huang, Xujie Zhou, Jizhi Zhou, Zhifeng Huang, Shuang Liu, Guangren Qian, Naiyun Gao
Bromate (BrO3(-)), as a contaminant producing from bromide (Br(-)) oxidation, has been revealed for generation in sulfate radical involved processes. In this work, reduced graphene oxide (rGO) was firstly applied to inhibit the formation of BrO3(-) in thermally activated peroxymonosulfate (thermal/PMS) treatment. In the presence of 5-35 mg/L rGO, the decomposition rate of PMS was slightly increased from 0.0162 ± 0.0013 min(-1) to 0.0200 ± 0.0010 min(-1), corresponding to removal rate of target pollutant increasing from 0...
June 15, 2017: Water Research
Xiaoling Liu, Hongyun Ji, Jiali Wang, Jinlan Xiao, Hongyan Yuan, Dan Xiao
An efficient and stable catalyst with fragment-exfoliating structure was prepared by directly ozone treatment of bulk graphitic carbon nitride (g-C3N4). The photocatalytic performances of the as-prepared catalysts were evaluated by degradation of methylene blue (MB) and photocatalytic hydrogen evolution reaction under visible light irradiation. Compared with untreated g-C3N4, the ozone-treated g-C3N4 (OCN) exhibited almost 5 times higher photodegradation activity and 2 times H2 evolution rate. The enhanced photocatalysis capability could be assigned to a narrowed band gap (2...
June 24, 2017: Journal of Colloid and Interface Science
Md Ashrafuzzaman, Farzana Afrose Lubna, Felix Holtkamp, William J Manning, Thorsten Kraska, Michael Frei
Rising tropospheric ozone concentrations in Asia necessitate the breeding of adapted rice varieties to ensure food security. However, breeding requires field-based evaluation of ample plant material, which can be technically challenging or very costly when using ozone fumigation facilities. The chemical ethylenediurea (EDU) has been proposed for estimating the effects of ozone in large-scale field applications, but controlled experiments investigating constitutive effects on rice or its suitability to detect genotypic differences in ozone tolerance are missing...
June 29, 2017: Environmental Pollution
Nathan Waldeck, Kent Burkey, Thomas Carter, David Dickey, Qijian Song, Earl Taliercio
BACKGROUND: Ozone is an air pollutant widely known to cause a decrease in productivity in many plant species, including soybean (Glycine max (L.) Merr). While the response of cultivated soybean to ozone has been studied, very little information is available regarding the ozone response of its wild relatives. RESULTS: Ozone-resistant wild soybean accessions were identified by measuring the response of a genetically diverse group of 66 wild soybean (Glycine soja Zucc...
June 29, 2017: BMC Genomics
Kow Su-Huan, Muhammad Ridwan Fahmi, Che Zulzikrami Azner Abidin, Ong Soon-An
  Advanced oxidation processes (AOPs) are of special interest in treating landfill leachate as they are the most promising procedures to degrade recalcitrant compounds and improve the biodegradability of wastewater. This paper aims to refresh the information base of AOPs and to discover the research gaps of AOPs in landfill leachate treatment. A brief overview of mechanisms involving in AOPs including ozone-based AOPs, hydrogen peroxide-based AOPs and persulfate-based AOPs are presented, and the parameters affecting AOPs are elaborated...
November 1, 2016: Water Environment Research: a Research Publication of the Water Environment Federation
Baptiste Mathon, Marina Coquery, Cécile Miege, Ywann Penru, Jean-Marc Choubert
This study gives a full overview of the chemical oxidation by ozone of selected xenobiotics usually present in effluents of conventional wastewater treatment plants. A qualitative and quantitative overview of literature data was made, and describes the ozonation efficiency and processes for the elimination of 12 xenobiotics (pesticides and pharmaceuticals). A database was built, compiling literature results of experimental ozonation assays in laboratory and real-scale conditions. Special attention was paid to selecting the data and compiling reliable results on removal efficiencies and kinetic parameters...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Xiao-Ling Zou
A combined process of coagulation-catalytic ozonation-anaerobic sequencing batch reactor (ASBR)-SBR was developed at lab scale for treating a real sodium dithionite wastewater with an initial chemical oxygen demand (COD) of 21760-22450 mg/L. Catalytic ozonation with the prepared CeO2/granular activated carbon catalyst significantly enhances wastewater biodegradability and reduces wastewater microtoxicity. The results show that, under the optimum conditions, the removal efficiencies of COD and suspended solids are averagely 99...
June 29, 2017: Environmental Technology
Stylianos K Stylianou, Ioannis A Katsoyiannis, Mathias Ernst, Anastasios I Zouboulis
The present study aims to evaluate changes in the structure-composition of natural organic matter (NOM) that occur after the application of bubbleless ozonation or peroxone treatment of surface waters. The oxidation experiments (using 0.5-2 mg O3/mg DOC, or 2:1 O3:H2O2 molar ratio) were performed in a continuous mode, using a tubular ceramic membrane contactor. Fluorescence spectroscopy (emission-excitation matrix) and liquid chromatography-organic carbon detection (LC-OCD) were mainly used for the detailed DOC characterization...
June 27, 2017: Environmental Science and Pollution Research International
Peng Zhao, Angelica Azcatl, Yuri Y Gomeniuk, Pavel Bolshakov, Michael Schmidt, Stephen J McDonnell, Christopher L Hinkle, Paul K Hurley, Robert M Wallace, Chadwin D Young
The electronic properties of the HfO2/MoS2 interface were investigated using multifrequency capacitance-voltage (C-V) and current-voltage characterization of top-gated MoS2 metal-oxide-semiconductor field effect transistors (MOSFETs). The analysis was performed on few layer (5-10) MoS2 MOSFETs fabricated using photolithographic patterning with 13 and 8 nm HfO2 gate oxide layers formed by atomic layer deposition after in-situ UV-O3 surface functionalization. The impedance response of the HfO2/MoS2 gate stack indicates the existence of specific defects at the interface, which exhibited either a frequency-dependent distortion similar to conventional Si MOSFETs with unpassivated silicon dangling bonds or a frequency dispersion over the entire voltage range corresponding to depletion of the HfO2/MoS2 surface, consistent with interface traps distributed over a range of energy levels...
July 19, 2017: ACS Applied Materials & Interfaces
Hu Shi, Bruce Cooper, Richard L Stroshine, Klein E Ileleji, Kevin M Keener
High-voltage atmospheric cold plasma (HVACP) is a novel nonthermal 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...
July 18, 2017: Journal of Agricultural and Food Chemistry
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
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
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