Search results for "Black carbon"

showing 3 items of 13 documents

A multi-analytical approach for the characterization of black crusts on the facade of an historical cathedral

2020

Abstract This study focuses on the characterization of black crusts collected from the Monza cathedral located in the homonymous city (N Italy), a hot spot from the point of view of the atmospheric pollution. Black crusts and substrate marble specimens were analyzed by a multi-analytical approach including X-ray Diffraction (XRD), Fourier Transform-Infrared spectroscopy (FT-IR), Stereomicroscopy (SM), Polarized Light Microscopy (PLM), High Resolution Scanning Electron Microscopy coupled with Energy Dispersive X-ray spectroscopy (HRSEM-EDX) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP/MS). The characterization of the carbon fraction (organic carbon, OC, and element…

Thermogravimetric analysisPolarized light microscopyMaterials scienceScanning electron microscope010401 analytical chemistryMineralogychemistry.chemical_element02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesNitrogenBlack carbonaceous particles Black crusts Conservation Cultural Heritage Marble stone Urban air pollution0104 chemical sciencesAnalytical ChemistryCharacterization (materials science)chemistry.chemical_compoundchemistryCarbonate0210 nano-technologySpectroscopyCarbonSettore GEO/09 -Georis. Miner.e Appl.Mineral.-Petrogr. per l'Ambi.ed i B.Cult.SpectroscopyMicrochemical Journal
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Molecular Signatures of Biogeochemical Transformations in Dissolved Organic Matter from Ten World Rivers

2016

Rivers carry large amounts of dissolved organic matter (DOM) to the oceans thereby connecting terrestrial and marine element cycles. Photo-degradation in conjunction with microbial turnover is considered a major pathway by which terrigenous DOM is decomposed. To reveal globally relevant patterns behind this process, we performed photo-degradation experiments and year-long bio-assays on DOM from ten of the largest world rivers that collectively account for more than one-third of the fresh water discharge to the global ocean. We furthermore tested the hypothesis that the terrigenous component in deep-sea DOM may be far higher than biomarker studies suggest, because of the selective photochemi…

bio-degradationEarth sciences and geologyligniinilignindissolved organic matterWorld riversblack carbonPlants (botany)ultra-high resolution mass spectrometryLife sciences biologyDissolved organic matter (DOM)lcsh:QEarth Scienceworld riversphoto-degradationlcsh:ScienceFrontiers in Earth Science
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Aircraft measurements of aerosol particles and trace gases over the Southern Baltic Sea during the BALTIC'15 campaign in 2015

2019

During the BALTIC'15 campaign, conducted in August 2015 over the Southern Baltic Sea, trace gasses (CO2/O3/NOy/SO2) and aerosol particles (number concentration of total/non-volatile/Aitken mode/ Accumulation mode/Coarse mode/refractory black carbon, aerosol extinction coefficient, mass concentration of refractory black carbon were measured). Observations were performed on board of the Alfred Wegener Institute research aircraft Polar 5 during 4 flights: - Scientific flight 1 (SF1) 26 August 2015 - Scientific flight 2 (SF2) 28 August 2015 - Scientific flight 3 (SF3) 28 August 2015 - Scientific flight 4 (SF4) 30 August 2015

particleBaltic Seaextinctionair pollutionO3SO2NOyblack carbonmarine trafficAtmospheric Physics @ AWI (AWI_AtmoPhy)marine boundary layerShip emissionBALTIC'15CO2
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