Search results for " UV irradiation"

showing 2 items of 2 documents

Effect of Short-Term and UV Irradiation Aging on the Behaviour of SBS-Modified Bitumen

2022

To obtain road bitumen with improved temperature and fatigue resistance, polymers and/or rubbers could be added to it. A particularly suitable polymer for bitumen modification is styrene-butadiene-styrene (SBS) copolymer but limited information is available about the ageing behaviour of modified binders. In this work, two neat bitumens, with different penetration grades, and two SBS-modified bitumens, containing different SBS amounts, were selected, and their short-term and UVB ageing behaviour were investigated considering dynamic shear rheometry and Attenuated Total Reflectance-Fourier Transformation InfraRed spectroscopy (ATR-FTIR). Short-time ageing behaviour was investigated performing…

FTIR analysis SBS-modified bitumen short-term ageing UV irradiationSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiRenewable Energy Sustainability and the EnvironmentGeography Planning and DevelopmentSettore ICAR/04 - Strade Ferrovie Ed AeroportiBuilding and ConstructionManagement Monitoring Policy and LawSBS-modified bitumen; short-term ageing; UV irradiation; FTIR analysis
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Photochemical sample treatment for extracts clean up in PCB analysis from sediments.

2013

Sample purification can be considered the most polluting step of the whole analytical process for PCBs determination in sediment samples. The use of photochemical sample treatment represents an alternative methodology for extracts clean up allowing for a reduction of the used amount of organic solvents. The first application of a photochemical sample treatment for the selective removal or reduction of organic substances interfering with PCBs analyses in sediments is reported. The method's efficiency and robustness were compared with currently used chromatographic purification. Quality parameters such as recovery, linearity and reproducibility were studied. The entire procedure was validated…

Sample purificationReproducibilityGeologic SedimentsChromatographyPCBChemistryPhotochemistrySample (material)PCB Photochemical sampletreatment Sediment Clean up UV irradiationUV irradiationSedimentReplicatePhotochemistryPolychlorinated BiphenylsGas Chromatography-Mass SpectrometryAnalytical ChemistryClean-upCongenerEnvironmental chemistryClean upSettore CHIM/01 - Chimica AnaliticaSedimentGas chromatography–mass spectrometryPhotochemical sampletreatmentTalanta
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