air analysis Articles

  • Air quality in America

    Although most Americans tell pollsters they believe air pollution in the United States is getting worse, the reality is quite different. In 'Air Quality in America: A Dose of Reality on Air Pollution Levels, Trends, and Health Risks' (AEI Press, January 2008) environmental scientist Joel Schwartz and political scientist Steve Hayward demonstrate why air pollution has been dropping steadily for ...


    By Blue Sky Consulting Group

  • In the queue for clean air

    The National Emissions Ceilings Directive (NECD), adopted in 2001, defines the maximum emissions on a national level for four major air pollutants that have a high impact on human health and the environment. These are: sulphur dioxide, nitrogen oxides, volatile organic compounds and ammonia. The Directive will undergo revision in 2008, which would set new interim air quality targets and related ...

  • Air Quality Monitoring

    Why monitor air quality? Well, to monitor is to know. Everything else is just more or less qualified guesses. International, national and local air quality targets and limits are also tied to monitoring results. What is Air Quality? How is air quality ...


    By Opsis AB

  • Fireworks air pollution in Slovenia

    Over the 'Christmas–New Year' period 12/2010–01/2011, PM10 air pollution measurements on most of the automatic measuring stations in Slovenia reached extreme values of up to 300 µg/m³. Analysis shows a very close correlation with the timings of the fireworks displays in the areas. This paper shows the other side of this cultural enjoyment - the effect on PM10 air pollution. As the correlation ...


    By Inderscience Publishers

  • Expanding Reservoir Air Filters

    In all vented tanks, the rise and fall of fluid levels is offset by a corresponding volume of incoming and outgoing air. Keeping the incoming replacement air clean is essential for contamination control and thus the reliability of hydraulic systems. While targeting the system's reliability, JLM Systems Limited has developed the OilMiser™ Reservoir Aspirator (ORA) kit. This product represents a ...


    By JLM Systems Ltd

  • Air Sparging - Technology Overview

    Air sparging involves injecting a gas (usually air/oxygen) under pressure into the saturated zone to volatilize groundwater contaminants and to promote biodegradation in saturated and unsaturated soils by increasing subsurface oxygen concentrations. Vola tilized vapors migrate into the vadose zone where they are extracted via vacuum, generally by a soil vapor extraction system. The term ...

  • Ambient Air Sampling Methods

    Pollutants are nothing but any substance that may present in an atmosphere in such a concentration that it may harmful to surrounding, living organism or human being. Sampling and analysis of air pollutants is known as Air quality monitoring and it is major part of environmental monitoring. There are many advanced types of ambient air Sampling methods. we will learn here only which are most ...


    By Perfect Pollucon Services

  • A Breath of Fresh Air for Your

    As the full effect of the Federal Clean Air Act (CAA) Amendments continue to impact today’s industry, many companies will be required to install new or additional air pollution control equipment.  With over two decades of proven success, catalytic oxidation is a popular method for controlling volatile organic compound (VOC) emissions.During the past 25 years, industry has made progress in ...


    By The CMM Group, LLC

  • A study on the exergetic analysis of continuous textile dryers

    This study deals with the exergetic analyses of the continuous textile dryers consisting of a stenter and a conveyor belt dryer. The exergy destructions in each of the components of the overall system are determined for average values of experimentally measured parameters. Exergy efficiencies of the system components are calculated to assess their performance. The effects of varying exhaust air ...


    By Inderscience Publishers

  • Air Quality Monitoring

    Why monitor air quality? Well, to monitor is to know. Everything else is just more or less qualified guesses. International, national and local air quality targets and limits are also tied to monitoring results What is Air Quality? How is air quality characterised? It is quite common to find air quality indexes, where the ranges are divided in sections indicating ...


    By Opsis AB

  • Economic growth and the environment in China: an empirical analysis of productivity

    China is an economic powerhouse with annual economic growth averaging close to 9% over the last 25 years. However, as a result of this extremely rapid economic growth, the scale and seriousness of its environmental problems are clearly evident. Consequently, a number of environmental problems, including growing energy consumption, heavy reliance on coal and increasing air pollution are ...


    By Inderscience Publishers

  • Cost-profit analysis of multilateral recycling system in Asia

    The objective of this study is to clarify quantitatively the driving force of multilateral recycling system in Asia, especially focusing on economic factors. To this end, we proposed a cost-profit analysis model for multilateral recycling system considering the differentials of economic factors between developed and developing countries at first. Based on this model, we conducted cost-profit ...


    By Inderscience Publishers

  • Exergy transfer analysis of a pin fin in external flow

    Based on the non-equilibrium thermodynamic theory, a general exergy transfer model is developed to describe the exergy transfer characteristics of external convection by using Black Body Approach. This model is applied to the study of fin efficiency for exergy transfer, which is defined as the ratio of the actual exergy transfer rate to the ideal exergy transfer rate. Both the analytical ...


    By Inderscience Publishers

  • Modelling and analysis of the atmospheric nitrogen deposition in North Carolina

    The United States Environmental Protection Agency's Community Multiscale Air Quality (CMAQ) regional-scale model is used to study concentrations and dry deposition of nitrogen species in North Carolina (NC) during the summer season. Each modelled and measured species featured a similar diurnal trend. A process budget analysis (production and removal evaluation) of NO, NO2, and ...


    By Inderscience Publishers

  • PM source apportionment analysis in the Venetian area

    A CALMET–CAMx system was implemented to investigate PM10 source apportionment in the urban area of Venice. The modelling system was run for two winter months on a domain covering most of the Veneto region with a 4 km resolution mesh and a 1 km nested grid over Venice and its mainland area, in order to distinguish the local emission contributions from the regional ones. A brute–force method was ...


    By Inderscience Publishers

  • Evaluation of the effects of varying the water velocity at the entrance of the contact zone on the performance of a dissolved air flotation (DAF) unit using the image analysis method

    For a more efficient design of dissolved air flotation (DAF) units, it is important to deepen our knowledge of the role that each constituent part plays with regard to overall performance. The velocity control of the flocculated water at the entrance (Ve) of the contact zone of DAF units is important because the degree of agitation in this region may affect the size of the flocs and the ...


    By IWA Publishing

  • A numerical analysis of the aspiration efficiency of a personal sampler

    The impact on sampling efficiency of increasing the flow rate of a low flow personal sampler has been examined. Increases in flow rates were required to obtain sufficient particle mass over the duration of a typical rush hour commute (3.5?16.7 litres/min). Computational Fluid Dynamics (CFD) modelling has been used to assess the implications of this higher flow on the aspiration efficiency of the ...


    By Inderscience Publishers

  • Evaluation and analysis of household hazardous substances in Kuwait

    Many of the products we use for housework, gardening, home improvement, or car maintenance contain hazardous materials that endanger our health as well as pollute the environment. Inappropriate use, storage, and disposal of hazardous household products can cause injuries, poisoning, and air pollution. The objectives of this paper were to determine the type and the quantity of hazardous materials ...


    By Inderscience Publishers

  • Accidental Releases Analysis for Toxic Aqueous Solutions

    As a result of the cluster rule for the control of the hazardous air pollutants, pulp and paper mills are in the process of further substituting chlorine with aqueous chlorine dioxide for their bleaching operations. In addition, ammonia aqueous solutions are applied by paper mills in various processes. An evaporation model including both heat and mass transfer for aqueous solutions has been ...

  • EDXRF Analysis of Sulfur and Other Elements in Oil

    The concentrations of sulfur substances in fuel oil, which greatly contribute to air pollution and acid rain, are regulated by law in many countries, and these regulations are becoming stricter with the growing concern about their impact on the environment and the consequences for society. Here, using the easy-to-operate EDX-720 energy dispersive X-ray fluorescence spectrometer, we determined the ...

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