ambient air Articles
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What is Ambient Air Quality?
The Earth’s atmosphere is divided into five major layers: namely, the troposphere, stratosphere, mesosphere, thermosphere, and the exosphere. The troposphere is the atmospheric layer closest to the Earth’s outer surface contains bulk of the atmosphere’s mass, is the layer in which all weather occurs, and contains the air that we breath. Ambient air is atmospheric air in its ...
By WKC Group
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What is Ambient Air Quality?
The Earth’s atmosphere is divided into five major layers: namely, the troposphere, stratosphere, mesosphere, thermosphere, and the exosphere. The troposphere is the atmospheric layer closest to the Earth’s outer surface contains bulk of the atmosphere’s mass, is the layer in which all weather occurs, and contains the air that we breath.Ambient air is atmospheric air in its natural uncontaminated ...
By WKC Group
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Case study - Continuos integrating air sampling to determine PAH distribution and profiles in the Nothern and Central Europe
Project reference Project: Pilot project in the Northern and Central Europe Project period 1999-2000 Nature of task: simultaneous determination of PAH concentrations in the ambient air of four European countries evaluate the contribution from different emissions to the ambient air concentrations of PAHs Summary Three order of magnitude difference of PAH amounts were detected between ...
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Economic Evaluation of Air Quality Targets for CO and Benzene
The study is to identify and estimate the costs and benefits of meeting ambient air quality standards for carbon monoxide (CO) and benzene in the EU. The study should take the range of scientifically-based limit values for ambient air quality as given and analyze the costs and benefits of attaining these standards. These costs and benefits should be compared with the costs (loss of benefits) of ...
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Novel method for producing uncertainty-weighted averages from a time series of ambient air measurements
A novel method for producing uncertainty-weighted averages from time series of ambient air measurements is presented. This method uses robust regression to establish a relationship between the measured mass concentration values and their uncertainties, and then uses the residuals of individual points from this relationship to calculate a weighting parameter. This parameter can then be used to ...
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Health Impacts of Transported Global Air Pollution and International Trade
Globalization moves production and health problems to low cost countries such as China. Estimations show that 3.45 millions of deaths of people yearly are caused by PM2.5 particulate matter in the ambient air. 760.000 of these deaths are caused by production of goods in one continent for use in another continent. ...
By OPSIS AB
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Air pollution by ozone in Europe in summer 2006
This report provides an evaluation of ground-level ozone pollution in Europe for April-September 2006 based on information submitted to the European Commission under Directive 2002/3/EC on ozone in ambient air. Since the submitted data have not yet received their final validation by Member States, the conclusions drawn in this report should be considered as ...
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Ambient Air Monitoring for Government Agency - Case Study
Customer The Department of Labour Inspection (DLI) of the Republic of Cyprus Background DLI participates in the European Monitoring and Evaluation Programme (EMEP), contributing to the monitoring and evaluation of long-range transmission of air pollution in a background application. Due to the appropriate measures taken over the years concentrations of most pollutants in the atmosphere have been ...
By Synspec BV
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Continuous Monitoring – Single Family Residence – Los Angeles CA - Case study
Date Conducted: October 2016 Client: Ramboll Oversite Agency: CA-DTSC Project Description: Continuous monitoring of indoor and ambient air for TCE at 8 locations inside and outside a single family residence with goal to determine the source of TCE previously detected. Data were collected for 30 days. The real-time data enabled immediate recognition of indoor TCE concentration variations when air ...
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Continuous air quality monitoring on a refinery - Case Study
We installed several Ecomsmart for ambient air quality monitoring on the TOTAL refinery site. By connecting to the web platform www.i-comesure.com users can be constantly informed in real-time of the air quality at their production ...
By Ecomesure
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Impact of ambient air temperature and injection timing on reduction of engine out emissions of DI diesel engine operating under the influence of oxygen enriched hydrogen gas
The present experimental work is a study of the impact of ambient air temperature and the injection timing of diesel fuel on reduction of engine–out emissions of DI diesel engine, operating under the influence of oxygen enriched hydrogen gas. Here the oxygen enriched hydrogen gas was produced by the process of water electrolysis. The produced gas was aspirated into the combustion process of ...
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Once Upon a Time – the Founding of OPSIS
35 years ago, in October 1985, the “Opsis Aktiebolag” (or just “OPSIS”) was registered as a private limited company. By that time, the two founders and owners Leif Unéus and Svante Wallin had a vision of using spectroscopy as a tool for measurements of gaseous pollution in ambient air. They even had an almost working instrument! What preceded the registration? As in many other cases, it was a ...
By OPSIS AB
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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 ENVEA
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Nanostructured thin films of Ba doped In2O3 for selectively monitoring trace levels of NOx
Nanostructured thin films of Ba-doped indium oxide have been examined for monitoring ppm levels of NOx in ambient air, and their response patterns have been recorded at different operating conditions. These films are found to be capable of sensing down to 0.5 ppm NOx concentration in air. The optimum operating temperature for sensing is found to be 300°C. Response and retrace times are ...
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Dynamic modelling of transient emissions and concentrations from traffic in street canyons
In the EU 5th framework project DECADE (2001–2003), a new methodology has been developed to calculate in detail the engine power required to drive a given vehicle over any particular route. It includes the rapidly changing (transient) demands placed on the engine, an area that has proved an obstacle to accurate simulations in the past. Together with the associated speed profiles, the actual power ...
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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 ...
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Dust monitoring with AirSafe - Case Study
Application A producer of building materials manufactures adhesives for fl oor tiles. As a part of the production process powder is transported through pipes from one production site to another. The pipes lead through production facilities and rooms which are diffi cult to control because of their vast extent. In the past several leakages in the pipework caused the discharge of aggressive ...
By ENVEA
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PVC dust monitoring in packaging areas for early warning of hazardous dust concentrations
Application At a PVC powder manufacturing site, robots are used in the packaging plant to fill 25 kg bags. The company’s ATEX guidelines state that there is an ATEX Zone 22 in the area of 5 metres around the plant. The ignitable mixture of PVC powder is 50 g/m3, which can happen if a bag does not withstand the pressure and breaks when being filled by a robot. However, by the time the ...
By ENVEA
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Emission measurement of PM 10 AND PM 2.5 at industrial sources
1. Introduction Recently new standards were set for ambient air concentrations of PM 10 and PM 2.5 in the European Union (Council Directive, 1999) [1]. First estimates and measurements show that both, annual and daily ambient air concentrations are expected to exceed the limit values for PM 10 at various locations in Europe. Thus, action plans will have to be set up to reduce PMx mass ...
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Two impact related air quality indices as tools to assess the daily and long-term air pollution
The methodology of the recently developed Daily Air Quality Index (DAQx) and Long-term Air Quality Index (LAQx) is explained. Both indices consider air pollutants frequently monitored at long-term stations within official air pollution control networks. Therefore, they enable an assessment of the integral air pollution, which reflects the ambient air consisting of a mixture of air pollutants more ...
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