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- Edner, Hans, et al.
(författare)
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Industrial Emission Control Using Lidar Techniques
- 1995
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Ingår i: Environmental Science & Technology. - : American Chemical Society (ACS). - 1520-5851 .- 0013-936X. ; 29:2, s. 330-337
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Tidskriftsartikel (refereegranskat)abstract
- A mobile DIAL (differential absorption lidar) remote sensing system has been employed in the monitoring of industrial pollutant emissions. Measurements of sulfur dioxide and mercury vapor were performed at nine different Swedish industrial plants within the framework of a control program commissioned by the Swedish Environmental Protection Agency. Total atmospheric fluxes of these species could be determined by combining wind data with a mapping of the concentration distribution downwind from the sources. The emission values obtained were compared with in situ measurements made by the companies themselves. The values from single point sources correlate well, whereas the DIAL system normally measures a higher total flux from several distributed sources including diffuse emissions. The results are used to discuss the applicability and limitation of the DIAL technique for remote surveillance of industrial emissions.
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| 4. |
- Ferrara, R, et al.
(författare)
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Atmospheric mercury sources in the Mt. Amiata area, Italy
- 1998
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Ingår i: Science of the Total Environment. - 1879-1026. ; 213:1-3, s. 13-23
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Tidskriftsartikel (refereegranskat)abstract
- Mt. Amiata, located in southern Tuscany (Italy), is part of the geologic anomaly of the Mediterranean basin, which contains about 65% of the world's cinnabar (HgS) deposits. Atmospheric mercury emissions from the main sources (geothermal power plants, abandoned mine structures and spoil banks of roasted cinnabar ore) were determined by flux chamber and by LIDAR remote sensing. Mercury emissions from five geothermal power plants were on the order of 24 g h(-1) for each plant, a value that remains constant throughout the year. In the month of July, the mine spoils (covering an area of similar to 200000 m(2)) emit a few grams of mercury per hour, while the abandoned mine structures give off 100-110 g h(-1). These two mercury sources were strongly influenced by ambient temperature. The area affected by mercury sources displays an average air mercury concentration of 20 ng m(-3) during the summer and 10 ng m(-3) in winter. (C) 1998 Elsevier Science B.V.
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| 5. |
- Wallinder, E, et al.
(författare)
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Vertically sounding ozone lidar system based on a KrF excimer laser
- 1997
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Ingår i: Physica Scripta. Topical Issues. - : IOP Publishing. - 0281-1847. ; 55:6, s. 714-718
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Tidskriftsartikel (refereegranskat)abstract
- A differential absorption (DIAL) lidar system based on a Raman shifted KrF excimer laser was constructed and employed for vertically sounding measurements of tropospheric ozone, This system is described, including a presentation of measurements of Raman shifting efficiencies in hydrogen and deuterium. The performance of the new system was evaluated in measurement campaigns involving two further optical remote-sensing systems: A Nd:YAG/dye laser based lidar and a long-path differential optical absorption spectroscopy (DOAS) system, utilising a high-pressure xenon lamp.
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