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- W1001091016 abstract "Az aeroszolreszecskek kemiai osszetetelenek, morfologiajanak es heterogenitasanak jellemzese erdekeben nagyerzekenysegű roncsolasmentes mikroanalitikai modszereket fejlesztettunk es alkalmaztunk; a meret szerint frakcionalt aeroszol nyomelemtartalmanak meghatarozasahoz totalreflexios rontgenfluoreszcencia-analizist, az ammonium es nitrat molaranyanak meghatarozasahoz, valamint a szen es a cink kemiai allapotanak vizsgalatahoz totalreflexios geometriaju rontgenabszorpcios spektroszkopiat, egyedi reszecskek morfologiajanak es heterogenitasanak jellemzesehez elektronmikroszkopos mereseket. Kidolgoztuk a veluk harmonizalo meret szerint frakcionalt aeroszol-mintaveteli technikat, lehetőve teve ugyanazon minta mereset mindharom modszerrel. Megfelelően alacsony kimutatasi hataruk (< 1 ng/m3) miatt nagyon rovid mintaveteli időkkel gyorsan valtozo legkori folyamatok nyomonkoveteset teszik lehetőve. A modszerek teljesitőkepessegenek bemutatasat es a projekt kereteben vett aeroszol-mintakon valo alkalmazasat kiegeszitettuk a masodlagos aeroszol keletkezeset figyelembe vevő modellszamitasokkal, a koncentraciok es az aeroszol optikai vastagsag osszevetesevel, valamint kutatorepulőgepes meresekkel. | In order to characterize chemical composition, morphology and heterogeneity of aerosol particles, highly sensitive non-destructive microanalytical methods were developed and applied. Total reflection X-ray fluorescence analysis was used for determination of trace elemental composition of size fractionated aerosol. X-ray absorption spectrometry was used for determination of the molar ratio of ammonium and nitrate, as well as for studying the chemical state of carbon and zinc. A sampling technique was elaborated that harmonizes with the microanalytical methods and allows the collection of size fractionated aerosols. This technique enables the measurement of the same samples with the three microanalytical methods. Because of the sufficiently low detection limits (< 1 ng/m3), the techniques are suitable for tracing of rapidly changing atmospheric processes using extremely short sampling durations. In addition to demonstration of the capabilities of the methods and their application to aerosol samples collected in the framework of the project, atmospheric dispersion model calculations were performed, taking into account the formation of secondary aerosols. The concentrations were compared with aerosol optical thickness data. The sampling apparatus was also tested during research aircraft missions." @default.
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- W1001091016 date "2009-01-01" @default.
- W1001091016 modified "2023-10-17" @default.
- W1001091016 title "Az energiaszektor légköri kibocsátásának éghajlati hatása szempontjából fontos primer és szekunder aeroszolok jellemzése = Characterization of primary and secondary aerosols relevant for climate effect of the atmospheric emissions of the energy sector" @default.
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