ozone analysis Articles

  • Ozone-depleting substances 2012

    Aggregated data reported by companies on the import, export, production, destruction and feedstock and process agent use of ozone-depleting substances in the European Union Background In 1989 the Montreal Protocol on Substances that Deplete the Ozone layer entered into force. It has the objective of protecting the stratospheric ozone layer by phasing out the ...

  • Sensitivity analysis of ozone long term simulations to grid resolution

    In the frame of the CityDelta European modelling intercomparison, three different atmospheric chemistry transport models have been applied over the Milan area for a six-month summer simulation. To better evaluate the models' reliability and cleverness in simulating the long-term dynamics of pollutants in the atmosphere, a comprehensive sensitivity analysis with regard to all model configuration ...


    By Inderscience Publishers

  • Ozone precursor analysis using a thermal desorption-GC System

    In the United States, the Clean Air Act of 1970 gave the U.S. Environmental Protection Agency (EPA) responsibility for maintaining clean air for health and welfare. Six parameters are measured routinely in ambient air: SOx, NOx, PM10 (particulate matter less than 10 microns), Pb, CO and ozone. In the 1990 Clean Air Act Amendments, Title 1 expanded the measurements in air to include volatile ...


    By PerkinElmer, Inc.

  • Ozone-depleting substances 2014

    Aggregated data reported by companies on the import, export, production, destruction, and feedstock and process agent use of ozone-depleting substances in the European Union Background The Montreal Protocol on Substances that Deplete the Ozone layer, which entered into force in 1989, aims to protect the stratospheric ozone layer by phasing out more than 200 ...

  • 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

  • Ozone-depleting substances 2011 - Summary

    In 1989 the Montreal Protocol on Substances that Deplete the Ozone Layer entered into force. It has the objective of protecting the stratospheric ozone layer by phasing out the production of substances that contribute to ozone depletion. The Protocol covers over 200 individual substances with a high ozone.depleting potential, including chlorofluorocarbons (CFCs), halons, hydrochlorofluorocarbons ...

  • Meteorological normalisation and non-parametric smoothing for quality assessment and trend analysis of tropospheric ozone data

    Despite extensive efforts to ensure that sampling and installation and maintenance of instruments are as efficient as possible when monitoring air pollution data, there is still an indisputable need for statistical post processing (quality assessment). We examined data on tropospheric ozone and found that meteorological normalisation can reveal (i) errors that have not been eliminated by ...


    By Springer

  • An analysis of the meteorological and air quality conditions during an extreme ozone episode over the north-eastern USA

    In this study, an extreme ozone episode that occurred during the period 12-15 July 1995 over the north-eastern United States is investigated through model simulations. This paper is focused on the meteorological conditions prevailing during this ozone episode. The analysis is based on nested grid simulations performed with the meteorological model CSU-RAMS (Colorado State University - Regional ...


    By Inderscience Publishers

  • Economic Evaluation of Air Quality Targets for Tropospheric Ozone

    The study identifies and estimates the (least) costs and benefits of meeting ambient air quality standards (different sets of limit/target values) for tropospheric ozone in the EU, taking into account deposition constraints for acidification. This report is divided into three parts: Part A describes the methodology of the analysis and reviews the databases used for the scenario calculations. ...

  • Prediction of extreme ozone levels in Barcelona, Spain

    Barcelona is one of the most polluted cities in Western Europe, although our levels of air pollution are within the World Health Organisation air quality guidelines. However, high concentrations of air pollution have not been studied yet. Ground ozone levels is a topic of considerable environmental concern, since excessive level of ozone are taken as indicative of high pollution. In terms of the ...


    By Springer

  • The removal of pyritic sulphur from a coal by ozone

    The removal of pyritic sulphur from a Mexican sub-bituminous coal in different solutions was investigated. The effects of type and concentration of reagents used and the presence of ozone as oxidant, in a room temperature, were studied. The relevant factors in pyrite dissolution were determined by means of the statistical analysis of variance and optimised by the response surface method. Kinetic ...


    By Inderscience Publishers

  • Spline interpolation for modelling of accumulated effects of ozone

    An alternative approach for computing exposure indices, such as AOT40 of the ground-level ozone, is considered in this paper. The aim of the study is to compare it with the traditional way of calculating the exposure indices in order to discover possible weaknesses or strengths of both approaches. The problem under consideration is of great importance when modelling results, obtained after ...


    By Inderscience Publishers

  • Determination of transport processes of nocturnal ozone in Istanbul atmosphere

    Ozone, usually having a minimum value at night, often increase its concentration level which is known as nocturnal ozone. In this study, the magnitude, frequency and timing of nocturnal ozone maxima were determined between May and September for four years (2001-2004) for stations in the Asian and European sides of Istanbul, Turkey. The magnitude and frequency of late and early peaks for peak ...


    By Inderscience Publishers

  • Kinetics of the degradation of 2-chlorophenol by ozonation at pH 3

    ABSTRACT: Prediction of byproduct distribution during ozonation is of importance to the design of treatment process. In this study, degradation products in direct ozonation of 2-chlorophenol in aqueous solution were identified by employing the chemical derivatization technique, specifically, silylation. Transient distribution of degradation products, in a semi-batch reactor under three ozone ...


  • Impacts of Ozone Nonattainment Designation and Strategies for Compliance

    In 1997, the U.S. Environmental Protection Agency (U.S. EPA) revised the National Ambient Air Quality Standards (NAAQS), to include an 8-hour ozone standard. The previous 1-hour ozone standard addressed the effects of exposure to short periods of high concentrations of ground-level ozone. The intent of the new standard is to address exposure to lower ozone levels over longer durations. With the ...


    By Trinity Consultants

  • Air pollution by ozone in Europe in summer 2004

    Untitled Document In summer 2004, the levels of ground-level ozone were high in ...

  • Statistical characteristics of ozone and PM10 levels in a medium-sized Mediterranean city

    A statistical analysis of ozone and PM10 concentration levels in the area of Volos, a medium-sized Greek coastal city, was carried out for the period 2001-2003. The data analysis revealed that the Daily Maximum Hourly (DMH) value of ozone concentration reaches a maximum of 160 µg/m³ during summer; it is observed during afternoon hours and is associated usually with winds from southern directions. ...


    By Inderscience Publishers

  • 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

  • Ozone Based AOP process for refractory COD reduction in industrial waster water

    Introduction In recent years improvements  in ozone based advanced oxidation technology efficiencies have lowered capital and operating expenses, improving the viability of the use of ozone as the main oxidant. An investigation into alternatives for refractory COD removal which is economically attractive and do not produce sludge lead to an evaluation of ...


    By ESCO International

  • Olive mill effluent depuration by ozonation and Fenton processes enhanced by iron wastes

    The aim of the present work was to compare the potential of iron industry wastes to enhance ozone and hydrogen peroxide action on the degradation of olive mill wastewaters (OMWs). The results attained show a higher efficiency for ozonation using a lower catalyst load. Nevertheless, Fenton's process led to a larger amount of chemical oxidation demand (COD) removed per mole of oxidant applied. ...


    By IWA Publishing

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