ambient air Articles

  • 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

  • Nitro Beer Tastes Better

    If you've ever remarked on the smooth creaminess of a pint of Guinness, you've picked up on the key difference in its carbonation: Nitrogen rather than carbon dioxide. Such "nitro" beers have become a trend in recent years, with major U.S. breweries and small startups alike offering nitro products. Nitrogen keeps bitterness in check and balances out the hops to make drinkable craft brews, but it ...

  • How Does a Gas Analyser Work?

    Whatever you want to detect, you need to identify a property of the object that is easy-enough to measure. When it comes to monitoring and analysis of gaseous species (atoms or more commonly molecules), it turns out that it often is possible to utilize the optical properties of the gas. You need a light source, a light detector, and a characteristic behaviour of the gaseous species in question ...


    By Opsis AB

  • DOAS Explained

    DOAS stands for Differential Optical Absorption Spectroscopy. The DOAS technique was conceived almost a century ago, and it was applied on research level to air quality monitoring already in the 1970s. In the mid-1980s, the technology was then commercialised and turned into practical and wide-spread use. The acronym DOAS itself reveals quite a lot of what it is about. ...


    By Opsis AB

  • Recent Federal Developments

    TSCA/FIFRA EPA Extends Comment Period For Draft Guidance For Pesticide Registrants On Notifications, Non-notifications, And Minor Formulation Amendments: On October 5, 2017, the U.S. Environmental Protection Agency (EPA) issued a notice of extension of the comment period for the draft guidance  ...


    By Bergeson & Campbell, P.C.

  • Status of black carbon monitoring in ambient air in Europe

    Black carbon (BC) is increasingly discussed in science and environmental policy areas as an example of an air pollutant that affects both human health and contributes to climate change (e.g. WHO, 2012; UNEP/WMO, 2011; Bond et al., 2013; IPCC, 2013). In order to be able to make comparable measurements of BC in ambient air and to relate BC monitoring to health impacts and climate change it is ...

  • 2 ambient air monitoring stations for Bangladesh

    Bangladesh is one of the most densely populated countries in the world and its urban areas suffer from air pollution of different levels and it is extremely high in the Dhaka city where the population is about 12 million in 300 km2 of surface area. It has been estimated that air pollution is causing about 15,000 premature deaths and several million cases of illness every year, in the Dhaka city ...


    By Environnement S.A

  • Ambient Air Quality in India - An Alarming Report

    Are we mortgage India against air pollution? The answer may be “Yes”. The reason is India has witnessed a phenomenal increase in the number of industries and vehicles in the last decade, along with the mushrooming of cities. As a consequence, there has been a dramatic deterioration in the quality of urban air in most regions of the country particularly in big cities like Delhi, Mumbai, Kolkatta ...


  • National Ambient Air Quality Standards Update

    You have seen ALL4 documenting the corresponding evolution of the NAAQS levels since the current U.S. EPA administration started in January 2009, and we will continue to follow them closely and provide you with updates that we think are important to your operations.  The following sections provide updates on the most important NAAQS and how you can plan for them today.  Discusses SO2, ...


    By All4 Inc.

  • Measurement of Trace metals in Ambient air case study

    Trace metals are found at low concentration in the ambient environment and are associated with adverse health effects. The gold standard metal measurement is Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES); however, sample preparation is laborious and expensive. The Xact 625 metals monitor uses non-destructive X-ray fluorescence technology. A built-in sample collection system ...

  • What is the size distribution and sources of particles in ambient air?

    The particle sizes in the ambient air are ranged from 1 nanometer to slightly more than 10 micrometers. There are three modes: coarse, fine and nano. The course mode particles are road dusts, spores and pollens. The minimum sizes of these particles are 1 to 3 micrometers. The fine mode particles are generally secondary particles formed from reactions such as smoke, sulfates, nitrates, ammonium ...

  • Ambient Air Quality Analysis of Toxic Gases and Priority

    The EPA regional offices who continuously monitor ambient air quality have determined that combustion by-products and automobile exhaust make up the largest source of air pollution throughout the U.S., with more severe conditions existing overseas. Despite concerns about the conditions outdoors, air quality in the workplace and home environment receive even more attention. The EPA’s list of ...


    By Buck Scientific Inc

  • Ambient Air Fence Line Application case study

    Customer: Confidential Application: Ambient air Fenceline application Background: The Victoria Environmental Protection Agency installed an Opsis DOAS open path system to measure Benzene & ...


    By Ecotech Pty Ltd

  • Understanding ambient air quality instrument operating ranges

    In order to maximize the performance of an air quality monitoring station, careful selection of instrumentations is essential. One of the key issues is to have a good understanding of what pollutants need to be measured and at what concentrations. There are several different types of air quality monitoring, these include: Trace/Background Monitoring This is performed in areas where ...


    By Ecotech Pty Ltd

  • Legislation: The New Directive on Ambient Air Quality and Cleaner Air for Europe

    Keywords: Public health, pollution control, air quality framework measures, Directive 96/62, Sixth Environmental Action Programme, Clean Air for Europe Programme, Directive 2008/50, zones and agglomerations, limit values and target values, alert thresholds, critical level, information and reporting requirements, UK Air Quality Archive, ozone, action plans, enforcement ...


  • An ambient air quality monitoring network for Buenos Aires city

    This paper proposes an objective methodology for designing a multi-pollutant urban air-quality monitoring network to detect concentrations greater than reference concentration levels (CL). The network design includes both air quality simulation and an objective analysis based on monitoring tasks. The proposed methodology is applied to the city of Buenos Aires. Pollutants of concern are nitrogen ...


    By Inderscience Publishers

  • Comparison of indoor air quality in restaurant kitchens in Tehran with ambient air quality

    Air pollution is a major environmental health problem, affecting developed and developing countries around the world. Although the indoor air database is weak due to the scarcity of monitoring results, these estimates indicate that a serious indoor air problem may exist in developing countries. In developed countries, pollutant concentrations indoors are similar to those outdoors, with the ratio ...


    By University of Tehran

  • CO2 Capture from Ambient Air by Crystallization with a Guanidine Sorbent

    Carbon capture and storage is an important strategy for stabilizing the increasing concentration of atmospheric CO2 and the global temperature. A possible approach toward reversing this trend and decreasing the atmospheric CO2 concentration is to remove the CO2 directly from air (direct air capture). Herein we report a simple aqueous guanidine sorbent that captures ...


    By SusChem

  • Vertical and Diurnal characterization of volatile organic compounds in ambient air in Urban areas

    More than half of the world’s population lives in cities, and their populations are rapidly increasing. Information on vertical and diurnal characterizations of volatile organic compounds (VOCs) in urban areas with heavy ambient air pollution can help further understand the impact of ambient VOCs on the local urban environment. This study characterized vertical and diurnal variations in ...

  • Experiences in the modelling of traffic policy measures for ambient air quality management in Lithuania

    This paper presents the application of the Integrated Transport Effect Modelling System (ITEMS) in the city of Kaunas, Lithuania, taking into consideration some factors such as existing vehicle fleet, traffic flows, and ambient air quality monitoring data. The objective of this study is to estimate the exhausts of CO, NOx, and SO2 released by motor vehicles in relation to predictive traffic ...


    By Inderscience Publishers

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