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	Provedor de dados OMA (12) Autor Decadt, G. (12) Dehairs, F.A. (10) Baeyens, W.F.J. (9) Dedeurwaerder, H. (6) Gillain, G. (6) Goeyens, L. (6) Baeyens, J. (3) Elskens, I. (2) Mommaerts, J.-P. (2) Bogaert, M. (1) Bradley, D. (1) Dedeurwaerder, H.L. (1) Dejonghe, M. (1) Wartel, S. (1) Mais... Palavra-chave North Sea (4) Mercury (2) Southern Bight (2) ANE (1) Adsorption (1) Aeolian deposits Resuspension Trace metals ANE (1) Analytical techniques (1) Analytical techniques Coastal zone Dissolved chemicals Quantitative distribution Salinity Suspended particulate matter Trace metals Turbidity ANE (1) Belgian Coast (1) Belgium (1) Chemical analysis (1) Coastal waters Nitrogen cycle ANE (1) Digestion (1) Dissolved organic nitrogen ANE (1) Mercury compounds (1) Methodology (1) Nutrients (mineral) (1) Particulates (1) Suspended matter (1) Mais... Tipo do documento Info:eu-repo/semantics/article (12) Ano 1987 (1) 1985 (1) 1984 (3) 1983 (2) 1982 (5) País Belgium (12) Idioma Inglês (12)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 12 Primeira ... 1 ... Última An automated method for the assessment of mercury adsorption rates on particulate suspended matter OMA Baeyens, W.F.J.; Decadt, G.; Dehairs, F.A.; Goeyens, L.. A continuous filtration system connected to a mercury auto-analyzer has been constructed for obtaining mercury adsorption rates on particulate suspended matter. The capabilities of this device have been demonstrated by carrying out a series of experiments under controlled physicochemical parameter conditions on samples of the Scheldt estuary. Duplicate measurements showed coefficients of variation ranging from 1 to 6 %. Depending on the physico-chemical conditions, the initial adsorption rate per unit of dissolved mercury concentration varied between 1.2 and 8.1 x 10<sup>-2</sup> mn<sup>-1</sup>. Tipo: Info:eu-repo/semantics/article Palavras-chave: Adsorption; Mercury; Methodology; Particulates; Suspended matter. Ano: 1982 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3413 Boundary conditions for heavy metals at the air-sea interface OMA Dehairs, F.A.; Dedeurwaerder, H.; Dejonghe, M.; Decadt, G.; Gillain, G.; Baeyens, W.F.J.; Elskens, I.. During 1980 and 1981 the aerosol burden as well as the wet and dry atmospheric fall-out of Cu, Cd, Pb, Zn, Fe and Mn to the sea have been studied in the Belgian coastal area. Atmospheric Cu, Zn and Cd are observed to be introduced into the sea mainly by wet fall-out, while Fe, Mn and also Pb have a dry and wet fall-out of similar magnitude. Of these elements, Cu, Zn and Cd have the highest washout factors. Furthermore, for all elements, excepted Mn, discrepancies exist between washout factors above land and sea, with values up to 5 times larger above the sea.On the scale of the North Sea, atmospheric fall-out of Cu, Zn, Pb and Cd exceeds by one order of magnitude the combined input of the rivers Scheldt, Rhine and Meuse, while fall-out of Fe and Mn is of... Tipo: Info:eu-repo/semantics/article Ano: 1982 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=10065 Comparative study of different wet mineralisation digestion methods for the measurement of total mercury in biological samples OMA Dehairs, F.A.; Decadt, G.; Baeyens, W.F.J.. Three botanical substrates and one milkpowder were mineralised and digested by the following methods in order to measure their total mercury content: (1) HF/HNO<sub>3</sub>-KMnO<sub>4</sub>; (2) H<sub>2</sub>SO<sub>4</sub>/HNO<sub>3</sub>-KMnO<sub>4</sub>; (3) H<sub>2</sub>SO<sub>4</sub>/HNO<sub>3</sub>- H<sub>2</sub>O<sub>2</sub>; (4) H<sub>2</sub>SO<sub>4</sub>/HNO<sub>3</sub>-UV irradiation/KMnO<sub>4</sub>; (5) H<sub>2</sub>SO<sub>4</sub>/HNO<sub>3</sub>/V<sub>2</sub>O<sub>5</sub>-catalyst... Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestion; Mercury; Nutrients (mineral). Ano: 1982 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3380 Determination of methylmercury in biological samples by semiautomated headspace analysis OMA Decadt, G.; Baeyens, W.F.J.; Bradley, D.; Goeyens, L.. Gas-liquid distribution coefficients of methylmercury halides dissolved in water or benzene have been assessed by using a headspace injection system coupled to a gas chromatograph-microwave-induced plasma system. Vapor concentrations decreased in the following order: CH<sub>3</sub>HgI > CH<sub>3</sub>HgBr > CH<sub>3</sub>HgCl. To transform all methylmercury iodide, iodoacetic acid (IAc) is used as the liberating agent. Methylmercury iodide degradation is prevented by the addition of sodium thiosulfate (0.05 M). The results obtained with internal standard addition are not influenced by other volatile compounds including other mercury compounds. The method has been applied to a series of biological samples. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Analytical techniques; Chemical analysis; Mercury compounds. Ano: 1985 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3198 Distribution, transport and fate of Bi, Cu, Cd, Hg, Pb, Sb and Zn in the Belgian coastal marine environment. Part II: Spatial, temporal and compartmental distribution in the water column OMA Decadt, G.; Gillain, G.; Dehairs, F.A.; Dedeurwaerder, H.; Goeyens, L.; Baeyens, J.. Tipo: Info:eu-repo/semantics/article Ano: 1984 URL: http://www.vliz.be/imisdocs/publications/268322.pdf Distribution, transport and fate of Bi, Cu, Cd, Hg, Pb, Sb and Zn in the Belgian coastal marine environment. Part IV: The river Scheldt as a transport route of heavy metals to the sea OMA Baeyens, W.F.J.; Wartel, S.; Dehairs, F.A.; Decadt, G.; Bogaert, M.; Gillain, G.; Dedeurwaerder, H.. Tipo: Info:eu-repo/semantics/article Ano: 1982 URL: http://www.vliz.be/imisdocs/publications/286409.pdf Distribution, transport and fate of Bi, Cu, Cd, Hg, Pb, Sb and Zn in the Belgian coastal marine environment. Part V: Interaction kinetics between dissolved inorganic mercury and estuarine suspended matter OMA Baeyens, W.F.J.; Decadt, G.; Dehairs, F.A.; Goeyens, L.; Dedeurwaerder, H.; Gillain, G.. Tipo: Info:eu-repo/semantics/article Ano: 1982 URL: http://www.vliz.be/imisdocs/publications/286410.pdf Dynamic patterns of dissolved nitrogen in the Southern Bight of the North Sea OMA Baeyens, W.F.J.; Mommaerts, J.-P.; Goeyens, L.; Dehairs, F.A.; Dedeurwaerder, H.; Decadt, G.. Spatial and temporal variations of dissolved inorganic nitrogen (DIN) have been assessed in onshore and offshore areas of the Southern Bight on the basis of several years' measurements. They indicate that both the residual flow lines and DIN isoconcentration lines run parallel with the coast except in the vicinity of important freshwater discharge points such as the Scheldt estuary. Evidence was found that the seasonal DIN oscillations are not created through fluctuations in input conditions at the lateral boundaries, despite considerable fluctuations in these inputs which include the English Channel (from 500 tons(t) N day<sup>-1</sup> in June up to approximately 2000 t N day<sup>-1</sup> in February) and also rivers such as the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dissolved organic nitrogen ANE; North Sea; Southern Bight. Ano: 1984 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3310 Estimates of dry and wet deposition and resuspension fluxes of several trace metals in the Southern Bight of the North Sea OMA Dedeurwaerder, H.L.; Dehairs, F.A.; Decadt, G.; Baeyens, W.F.J.. In this study we have investigated air-sea exchanges in the Belgian coastal area located in the Southern Bight of the North Sea. Since 1980 the tropospheric aerosol contents for the trace elements Cd, Cu, Mn, Pb, Zn and for the reference elements Al , Fe, Na have been monitored on an intermittent basis from a maritime sampling platform (Light-Vessel West-Hinder; position: 51°23.5'N- 2°21.5'E, fig. 1). During 1981 sampling campaigns at sea were paralleled by sampling campaigns on land, in the coastal area (natural reserve De Blankaert, located at 20 Km inland), in order to allow for a better evaluation of the specific source or sink role of the sea. No major source of pollution exists between the maritime and the continental sampling sites. During these... Tipo: Info:eu-repo/semantics/article Palavras-chave: Aeolian deposits Resuspension Trace metals ANE; North Sea; Southern Bight. Ano: 1984 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3323 Microlayer metal excesses in a coastal North Sea area: relative contribution of dry fall-out OMA Dehairs, F.A.; Dedeurwaerder, H.; Decadt, G.; Baeyens, J.; Gillain, G.. Tipo: Info:eu-repo/semantics/article Palavras-chave: ANE; North Sea. Ano: 1983 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=10067 Nitrogen cycles in a coastal open sea zone off the Belgian coast OMA Baeyens, J.; Goeyens, L.; Dehairs, F.A.; Decadt, G.; Mommaerts, J.-P.. Tipo: Info:eu-repo/semantics/article Palavras-chave: Coastal waters Nitrogen cycle ANE; Belgium; Belgian Coast. Ano: 1983 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=10068 Trace metals in the eastern part of the North Sea: 1: Analyses and short-term distributions OMA Baeyens, W.F.J.; Gillain, G.; Decadt, G.; Elskens, I.. Advanced analysis procedures for dissolved and particulate trace metals in sea water have been developed and tested in international intercalibration exercises. Since these tests gave evidence that reliable data could be produced with such methods, trace metal distributions in the coastal waters of the eastern North Sea were studied.The spatial distributions of most dissolved and particulate trace metals are, at least qualitatively, similar. Their concentrations decrease with distance from the coast and the mouth of the Scheldt estuary ( particulates much stronger than dissolved species). The salinity gradient is similar (but opposite) to the trace metals and turbidity gradients. The five trace metals studied can be subdivided into two groups on the basis... Tipo: Info:eu-repo/semantics/article Palavras-chave: Analytical techniques Coastal zone Dissolved chemicals Quantitative distribution Salinity Suspended particulate matter Trace metals Turbidity ANE; North Sea. Ano: 1987 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3284 Registros recuperados: 12 Primeira ... 1 ... Última

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