Found 9941 publications. Showing page 243 of 398:
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Modeling of short chain chlorinated paraffins in the Nordic environment. NILU PP
Short chain chlorinated paraffins (SCCPs), also called polychlorinated n-alkanes, are mixtures of compounds of molecular formula CxH2x+2-yCly containing 10-13 carbon atoms and usually 30-70 % degree of chlorination. They have a range of industrial applications, and have been detected in numerous environmental compartments. There is concern regarding SCCPs due to their environmental persistence and their potential for bioaccumulation, adverse effects and long-range transport. SCCPs have been included in the UNECE LRTAP Convention, the priority substance list of the European Water Framework Directive, and are under consideration for the Stockholm Convention on Persistent Organic Pollutants. However, the behaviour and fate of SCCPs remain poorly understood, in part as the technical mixtures consist of thousands of isomers, enantiomers and diastereomers, which make analysis and modelling of these compounds very challenging. The purpose of this study was to explore a complementary modelling and monitoring approach to evaluate the overall understanding of the link between emissions of SCCPs, environmental levels and human exposure in the Nordic environment and to identify the more critical knowledge gaps. Data for emissions and physicochemical properties of SCCPs were gathered or estimated, and used to parameterize an integrated, non-steady state environmental fate and bioaccumulation model (CoZMoMan). Specific congeners of SCCPs were selected for the study to assess the extent of expected variation of environmental fate and behaviour within the multitude of compounds. Model results were next compared to reported environmental levels in the Nordic region. For compartments where environmental levels were scarce or lacking, targeted sampling and analysis was carried out to further evaluate the model predictions. Results from this study will be presented and discussed with emphasis on the more critical research needs with respect to the overall fate and exposure of SCCPs.
2011
SK-1531 Dispersion calculations and HSE evaluation. NILU OR
Norwegian Institute for Air Research (NILU) has performed dispersion calculations of emissions to air from stack SK-1531 at Mongstad refinery. Dispersion of NH3, HCN, CO, CO2, NO2, SO2 and benzene is calculated and analyzed. NILU has also evaluated the calculated concentrations from a HSE point of view, including life time/degradation of the components. The calculated concentrations have been added to existing background concentrations at Mongstad and the calculated total concentrations have been compared to air quality guidelines and threshold values. None of the components investigated here exceed the threshold values. Emissions from SK-1531 is then considered not to represent a problem for the air quality at Mongstad
2011
Assesment of wind, snow and seasalt. Hammerfest 2009-2010. NILU OR
NILU has made an assesment of windconditions, amount of snow and seasalt impact in Hammerfest. The assesment has been made on behalf of Statnett connected to a projected construction of power supply network.
2011
NILU has monitored particulate matter around Aquarock stone crushing facility at Sandnessjøen during the period 28.06.2010 - 07.02.2011. The monitoring results show exceedance of guidelines regarding dust fall 600 m northwest of the activity.
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NILU has carried out a monitoring program regarding meteorology and air quality in Sauda during the periode 01.04.-30.09.2010. Filters have been investigated regarding several metallic compounds.
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WMO/GAW expert workshop on global long-term measurements of nitrogen oxides and recommendations for GAW nitrogen oxides network. Hohenpeissenberg, Germany, 8-9 October 2009. GAW - Global atmosphere watch, 195
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Air quality Ny-Ålesund. Monitoring of local air quality 2008-2010. Measurement results. NILU OR
A selected number of air pollutants has been monitored in Ny-Ålesund to map the local emissions of air pollutants and to map the air quality of the area.
2011
Section 6.1 of the contract (BGD-3125 BGD-091066) between NORAD and NILU regarding Institutional Cooperation with the Bangladesh Ministry of Environment and Forest/Department of Environment (DOE) states that a progress report should be submitted semi-annually to NORAD. This report highlights the status of the project for the first six months of the project, August 2010 -January 2011. The project can be considered in good standing, with no major issues or deviations to report.
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Tunnels along E134, Kongsberg. Evaluating air quality around openings of tunnels. NILU OR
Dispersion calculations regarding the tunnel connections along E134, Kongsberg. Maximum concentrations and dispersion distances have been calculated.
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