Found 9854 publications. Showing page 247 of 395:
Measurement data July 2014 - June 2015. Environmental monitoring of emissions to air from Snøhvit-Hammerfest LNG. NILU rapport
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Atmospheric deposition of heavy metals in Norway. National moss survey 2015. NILU report
Commissioned by the Norwegian Environment Agency, NILU - Norwegian Institute for Air Research in collaboration with Norwegian University of Science and Technology (NTNU), collected moss from 230 sites and determined the content of 53 metals in these. The purpose of the survey is to map atmospheric deposition of heavy metals in Norway. Compared with data from 2005, a decrease is observed in the deposition of vanadium and lead. For chromium, nickel, copper, zinc, arsenic, cadmium and antimony, there is no appreciable change in deposition from 2005 to 2015
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Monitoring of size-segregated particulate matter fractions with optical instruments in urban areas.
The assessment of harmful PM concentrations i.e. particles with an aerodynamic diameter below 2.5 µm, requires continuous monitoring conducted for 24 hours a day, for 365 days a year. Monitoring campaigns for screening the PM levels in a particular urban area facilitate the conceiving of a continuous monitoring plan by establishing where to deploy optimally the optical instruments for on-line measurement. The paper presents the practical efficiency of the outdoor monitoring of PM size fractions using a new optical equipment i.e. Dusttrak DRX 8533 with environmental enclosure and heating module. The experiments were carried out in Targoviste city, Romania, between 2014 and 2015 within the first two phases of the ROkidAIR project (http://www.rokidair.ro) to perform a screening of the PM concentrations existing in these urban areas and to calibrate the prototype of the PM2.5 microstation developed within the project .The utilization of the DustTrak instrument showed that in heavy traffic conditions without significant industrial emissions, the most frequent PM fraction is the submicrometric one (PM1).The results pointed out the usefulness of monitoring four size segregated mass fractions and their relationship with the potential PM emission sources. Outdoor PM2.5 measurements provide key information for evaluating population exposure, planning of air quality and establishing of reliable measures that allow the lowering of PM emission.
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