ozone concentration Articles

  • SMOGSTOP: A new way of forecasting ozone concentrations at ground level

    Every summer, ground-level ozone concentrations rise in Belgium and cause episodes of photochemical summer smog. This phenomenon is the cause of well-recognised public health distress, especially for people suffering from respiratory diseases. In order to warn groups of sensitive people of forthcoming smog episodes, VITO (the Flemish Institute for Technological Research) and VMM (the Flemish ...


    By Inderscience Publishers

  • Statistical approach to estimate the impact of climate change on daily ozone concentrations

    Short–term exposure to ozone is a public health concern worldwide. Surface ozone is a secondary air pollutant, formed primarily through a complex series of photochemical reactions between nitrogen oxides and reactive hydrocarbons. Hot days with clear skies favour ozone production. Hence, a warmer climate is likely to increase ozone ambient concentration and consequently, the impact of ...


    By Inderscience Publishers

  • Pretreatment of concentrated leachate by the combination of coagulation and catalytic ozonation with Ce/AC catalyst

    A raw concentrated leachate produced from membrane bioreactor-nanofiltration (MBR-NF) was taken from Chengdu Chang'an Waste Landfill Site, China. The major fraction of this concentrated leachate was large refractory humic substances. A coagulation–ozonation process was applied to treat this leachate, aiming at enhancing chemical oxygen demand (COD) removal efficiency and increasing its ...


    By IWA Publishing

  • Estimate of potentially high ozone concentration areas in the centre of the Iberian Peninsula

    This paper presents a study to determine the areas that could most probably be affected by high ozone levels in the centre of the Iberian Peninsula. Considering the years 1992 and 1995, cluster analysis was applied to some variables to group those days with similar meteorological states. Three different meteorological cluster groups were identified and their main features analysed. Additionally, ...


    By Inderscience Publishers

  • Weekend?Weekday differences in near-surface ozone concentrations in Chennai, South India

    The paper describes the weekend?weekday differences in near-surface ozone (O3) concentration in Chennai, South India. The O3 data measured during 18 January 2006 to 28 February 2006 has been analysed. The result indicated no major difference between the weekdays and weekend profiles for the O3 concentrations. Further, oxides of nitrogen (NOx), carbon monoxide (CO), Suspended Particulate Matter ...


    By Inderscience Publishers

  • The role of temperature in tropospheric ozone

    After evaluating some meteorological simulations, we detect an error of over 5°C in surface temperature. In order to assess the effect of this anomaly in temperature, we perform new simulations of an emission model and a photochemical model using the correct surface temperature in the meteorological data. Our goal is not to solve the problem in surface temperature estimates, but to reveal how it ...


    By Inderscience Publishers

  • Hotels Put Ozone to Work

    Growing operational costs and lower-than average occupancy rates spurred Apple Farm Inn and Suites, San Luis Obispo, Ca., to explore economic and facility-efficiency benefits obtained through the installation of an ozone laundry system. At the Apple Farm Inn laundry facility, an evaluation lasting several months was conducted in late 2006 into 2007, comparing the costs of laundering by ...

  • Introduction to Ozone Injection Technology

    Untitled Document Ozone is a highly reactive chemical that has proven to be effective in destroying a wide variety of organic chemicals, including MtBE and chlorinated VOCs. ...

  • Sanitation Using Ozone & Chlorine

    For nearly 100 years, ozone has been used all over the world for water sanitation. It is nature’s strongest oxidizer and has a byproduct of pure oxygen. Chlorine, on the other hand, is a very effective, time-proven chemical, but is ineffective against hard-to-kill microorganisms such as cryptosporidium. It also has some unpleasant byproducts. Together, however, these two substances can ...

  • Ozone systems for beginners

    This paper is intended for people who know a cooling tower when they see one but have little or no knowledge of their care or what part ozone plays. I have tried to make this as simple as possible and there is even a block diagram on the last page to help you out. Ready? Okay, here is what you need to know first: The sole function of ozone use in evaporative cooling towers is to disinfect water. ...


    By Zentox Corporation

  • Ozone Depleting Substances

    Abstract In Europe the increase in ultra-violet radiation (UV) is estimated to be larger over the western parts because of large depletion in the total ozone column. UV global trends are estimated to increase by 3-4% per decade in northern hemisphere midlatitudes and 3-9% in southern hemisphere midlatitudes. The ozone layer can start recovering, but full recovery will take another 50 years if ...

  • Application of adjoint CMAQ chemical transport model in the Athens greater area: sensitivities study on ozone concentrations

    The factors affecting ground level ozone concentrations in the Greater Athens Area (GAA) are examined through adjoint sensitivity analysis, using a meteorology and air quality forecasting system based on MM5, the in–house EMISLAB emissions processing system and the chemical transport model Community Multiscale Air Quality (CMAQ). Sensitivities of the ground level ozone concentrations ('response ...


    By Inderscience Publishers

  • Ozone treatment for cooling towers

    Abstract The use of ozone as a maintenance treatment for cooling towers has good potential for operation and maintenance savings in the Federal secior. A small amount of ozone acts as a powerful biocide thai decreases or nearly eliminates the need to remove quantities of water from the cooling tower in order to decrease the concentration of organic and mineral solids in the system. ...


    By Zentox Corporation

  • A Discussion on Ozone Chemistry

    MEMBRANE AND APPLICATION DEVELOPMENT 1.0 INTRODUCTION The ability of ozone to effectively treat wastewater is dependent on the nature of contaminant in question. For example, ozone will readily remove color from a dye solution, but has much more difficulty reducing the biochemical oxygen demand (BOD) of a sucrose stream. These differences in ozone effectiveness are ...

  • Use of Monte Carlo uncertainty analyses to evaluate differences in observed and predicted ozone concentrations

    It is now possible to carry out Monte Carlo uncertainty studies with large photochemical grid models such as UAM-IV. The current study uses information on the effects of uncertainties in 109 input variables on UAM-IV model predictions of maximum daily one-hour averaged ozone concentrations at 29 monitoring sites in the New York City UAM domain for the 8 July 1988 ozone episode. Fifty Monte Carlo ...


    By Inderscience Publishers

  • An ozone climatology: relationship between meteorology and ozone in the Southeast USA

    A statistical analysis of ozone (O3) concentrations and meteorological parameters was performed to determine the relationship between meteorological changes and ambient O3 concentrations in the Southeast United States. The correlation between average daily maximum O3 concentration and various meteorological variables was analysed on a ...


    By Inderscience Publishers

  • Numerical simulations of the wind flow and ozone formation during the Heilbronn ozone experiment

    The Heilbronn ozone experiment was aimed at investigating the impact of short-term local-scale interventions on peak ozone levels during summer smog periods. The measures taken were estimated to lead to considerable reductions of road traffic emissions, but to only smaller reductions of industrial emissions. Model simulations with the European Zooming Model (EZM) were performed for assessing the ...


    By Inderscience Publishers

  • Inactivation of surface viruses by gaseous ozone

    Environmental surfaces may be contaminated with viruses and contribute to their transmission. Concerns have arisen in trying to control viruses because of an increasing incidence of viral infections. Ozone is considered to be a promising method to inactivate viruses on surfaces. In this investigation, the effects of ozone concentration, contact time, different capsid architecture of viruses, and ...

  • Production of ozone in the Chamonix Valley (France)

    In the framework of the Pollution of Alpine Valleys (POVA) programme, a numerical investigation aims to better understand how a reduction of traffic emissions can affect air quality in the Chamonix Valley (France). The MM5 model coupled with the Chemistry Transport Model (CTM) TAPOM using a 1-km cell grid for the period 5–12 July 2003 showed that the ozone formation in the Chamonix Valley was ...


    By Inderscience Publishers

  • Ozone-based reclamation of an STP effluent

    The system ozone and hydrogen peroxide was used to reclaim wastewater from the secondary clarifier from a Sewage Treatment Plant (STP) of Alcalá de Henares (Madrid-Spain). The assays were performed by bubbling a gas mixture of oxygen and ozone, with ~24 g Nm-3 of ozone concentration, through a volume of wastewater samples for 20 minutes at 25°C . The removal of dissolved ...


    By IWA Publishing

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