Found 9763 publications. Showing page 342 of 391:
2011
Atmospheric DMS in the Arctic Ocean and Its Relation to Phytoplankton Biomass
American Geophysical Union (AGU)
2018
2013
Atmospheric deposition of organic contaminants in Norway: National moss survey 2015. NILU report
For the second Norwegian Moss survey on organic contaminants 20 samples were collected on the Norwegian mainland in rural areas presumably little affected by local point sources of pollutants. PeCB, HCB, PCB, HCH, DDT, PBDE, DBDPE, HBCD, PFAS, and PAH were determined. There is a general trend of decreasing contamination from 2010 to 2015 for the POPs included in the survey. A trend of decreasing contamination with increasing latitude shown in the 2010 moss data is confirmed in the results from 2015. The results for PCB indicate release from local sources in the Oslo area.
2016
Atmospheric deposition of heavy metals. Utilising the moss technique. Statlig program for forurensningsovervåking. Rapport 831/2001. TA 1819/2001.
2001
Atmospheric deposition of heavy metals in the areas surrounding manufacturing plants. Utilising the moss technique. TA-2240/2007
2007
On request from Climate and Pollution Agency a survey of atmospheric deposition of heavy metals around 16 industrial enterprises at 13 different locations in Norway is executed. The survey is based on analysis of moss samples collected locally around each enterprise during the summer 2010, and includes 59 elements. The present survey is for a majority of the locations a repetition of equal surveys executed in the years 2000 and 2005.
2011
Atmospheric deposition of heavy metals in Norway. Nationwide survey in 2000. Statlig program for forurensningsovervåking. Rapport 838/01. TA-1842/2001.
2001
Atmospheric deposition of heavy metals in Norway. Nationwide survey 2010. NILU OR
The geographical distribution of atmospheric deposition of heavy metals in Norway was mapped in 2010 by analysis of moss samples from 464 sites all over the country. This report provides a presentation of the results and a comparison with data from a series of corresponding moss surveys starting 1977. The survey is part of an international program comprising large parts of Europe. The survey primarily concerns the ten metals of priority in the European program: vanadium, chromium, iron, nickel, copper, zinc, arsenic, cadmium, mercury, and lead. In addition data are reported for another 42 elements in the moss. The discussion of the obtained data mainly refers to contributions from air pollution. In addition influence from natural processes to the elemental composition of the moss and how it may influence the interpretation of the data is discussed.
2011
Atmospheric deposition of heavy metals in Norway. Nationwide survey 2005. Statlig program for forurensningsovervåking. Rapport 980/2007. TA-2241/2007.
2007
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
2016
The atmospheric gas phase photo-oxidation of methylamine (CH3NH2), dimethylamine ((CH3)2NH) and trimethylamine ((CH3)3N) has been studied under pseudo natural conditions at the European Photochemical Reactor, EUPHORE, in Valencia, Spain. Major products in the photo-oxidation were imines (methanimine and N-methyl-methanimine) and amides (formamide, N-methyl formamide and N,N-dimethyl formamide). Total aerosol yields obtained in EUPHORE experiments were between 8 and 14%. Mimicking conditions at Mongstad results in a steady-state nitrosamine concentration of less than 0.6 % of photo-oxidized dimethylamine and less than 1.1 % of photo-oxidized trimethylamine. For rural regions it is predicted that the formation yield of the corresponding nitramine in the atmospheric oxidation of CH3NH2, (CH3)2NH and (CH3)3N is less than 0.4 %, 2.5 % and 5 %, respectively. The major uncertainties in the current understanding of the fate of amines emitted to the atmosphere are related to night-time chemistry, to the chemistry of imines, and to chemistry in the aqueous aerosol.
2011
The gas phase photo-oxidation of 2-aminoethanol (MEA, NH2CH2CH2OH) has been studied in a series of experiments at the European Photochemical Reactor, EUPHORE, in Valencia (Spain). The results show that the branching in the OH initiated H-abstraction reaction with NH2CH2CH2OH is: <10 % from -NH2, >80 % from –CH2–, and <10 % from –CH2OH. The major products in the photo-oxidation are formamide, NH2CHO, and formaldehyde, CH2O. Amino acetaldehyde, NH2CH2CHO, and/or 2-imino ethanol, HN=CHCH2OH, and 2-oxo acetamide, NH2C(O)CHO are formed as minor products. 2-(Nitroamino) ethanol,O2NNHCH2CH2OH, has been unambiguouslyidentified as a minor product in the MEA photo-oxidation. It is estimated that less than 3 ‰ of MEA emitted to the atmosphere will end up as the possibly carcinogenic nitramine in rural regions.
2010
2012
Atmospheric Degradation of Amines (ADA). Amines in aerosol - A review. CLIMIT project no. 201604. NILU OR
This report presents a comprehensive review of current literature on the abundance of amines in atmospheric aerosols. The review spans over the whole life cycle of aerosols, showing the relevance of amine-related aerosol dynamic processes in each stage of the cycle. Amine compounds can constitute a siginificant fraction of submicron ambient aerosols, in particular in urban air and close to agricultural sources. It is evident from both field experiments and computational studies that amines have the propensity to contribute to new particle formation. Particulate phase oxidation of amines leads to the formation of potentially toxic products such as imines and nitrosamines. In general, there is a lack of information about the acute and chronic toxic effects of particulate amides and imines, and also the chemical mechanisms leading to their formation in aerosol particles are currently not fully understood.
2010
2002
2001
Atmospheric corrosion due to amine emissions from carbon capture plants
The atmospheric corrosion due to pure amines emitted from carbon capture plants was investigated. Amine exposure was found to initially inhibit the corrosion of steel, by its film formation and alkalinity, but reduce corrosion product layers and lead to freezing point depression, which could in turn increase the corrosion. Very high amine doses were observed to dissolve the metal without the establishing of a corrosion layer. These effects seem much more pronounced on copper than on steel. Climate and air quality variations affect the steel corrosion much more than the expected maximum amine deposition from carbon capture plant emissions.
Elsevier
2021
2016
2012