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[Combined elimination of TCE and chromate in reactive walls: results from trials]
1999
Locht, T. | Klingberg, J. | Kjeldsen, P.
[CEVENT: Center for Ventilation of Soil and Groundwater as in-situ remediation technique]
1999
Andersen, L. | Groen, C. | Hansen, A.B. | Hansen, I.K. | Nygaard, E. | Broholm, K. | Holm, J. | Holm, P.
[Detailed mapping: is our knowledge sufficient?]
1999
Baumann, J. | Foged, N. | Joergensen, P.
[Leachability of pesticides: Analysis of impact of variation on parameters of precipitation and biomass]
1999
Barlebo, H.C. | Lindhardt, B. | Hansen, M.
[ISO-standards: constraints or options?]
1999
Kruse, M.A. | Kirkegaard, C. | Faarbaek, A. | Samsoee-Petersen, L.
[Can natural degradation of pesticides lead to a changed risk assessment?]
1999
Lund, E.D. | Aktor, H.
[Mapping in detail: which methods?]
1999
Soerensen, K. | Soendergaard, V.
Interactive valuation : the social construction of the value of ecological services
1999
Jiggins, J. | Röling, N.
Distribution of volatile organic compounds in Madrid (Spain) Полный текст
1999
Pérez-Pastor, Rosa María | García-Alonso, Susana | Cabezas, Alberto José Quejido
From November 1995 to October 1996, airborne concentrations of VOCs were measured in the Madrid area to study the organic pollution in general, and the correlation between different pollutants in relation to such parameters as location and season. Mean concentrations for up to 90 compounds were measured at four test sites, including both urban and suburban areas.At the urban sites, maximum concentrations occurred in the autumn and winter, whereas minimum concentrations were reached in summer and spring. Similar changes were obtained for the lesscontaminated site located in the SE of the city, whereas a different pattern was found at the site in the NW of the city due to meteorological aspects. Mean levels of hydrocarbons in Madrid were quite similar to those found in other European cities.Chemometrical techniques were applied to the set of data in order to assess the influence of such factors as traffic, temperature and seasonal variations on the VOC levels.
Показать больше [+] Меньше [-]Absorption cross-sections of atmospheric constituents: NO2, O2, and H2O Полный текст
1999
Hermans, Christian | Vandaele, Ann C. | Carleer, Michel | Fally, Sophie | Colin, Réginald | Jenouvrier, Alain | Coquart, Bernard | Mérienne, Marie-France
Absorption spectroscopy, which is widely used for concentration measurements of tropospheric and stratospheric compounds, requires precise values of the absorption cross-sections of the measured species. NO₂, O₂ and its collision-induced absorption spectrum, and H₂O absorption cross-sections have been measured at temperature and pressure conditions prevailing in the Earth’s atmosphere. Corrections to the generally accepted analysis procedures used to resolve the convolution problem are also proposed.
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