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- 1.8 Umweltanalytik (7)
- 7 Bauwerkssicherheit (7)
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Afin de garantir la qualité des eaux en Europe, la Commission Européenne a demandé aux États Membres, de leur fournir des résultats de mesure comparables et traçables pour l’analyse des polluants critiques. Devant ces enjeux considérables pour la protection de l’environnement, l’apport de la métrologie est nécessaire pour améliorer la fiabilité des analyses et permettre la comparabilité des résultats. C’est pourquoi, le projet de recherche européen Euramet/EMRP/ENV08 « Traçabilité des mesures pour la surveillance des polluants critiques de la DCE, Directive Cadre européenne sur l’Eau (2000/60/CE) », financé par l’EMRP, avait pour objectif de fournir des éléments pour la mise en place d’une base métrologique. Des méthodes de référence primaires permettant d’analyser des substances dangereuses prioritaires y sont développées pour répondre aux exigences de la DCE en termes de niveaux de performance (limites de quantification et incertitudes). Les hydrocarbures aromatiques polycycliques (HAP), substances dangereuses prioritaires « orphelines » de méthodes DCE compatibles, font partie des polluants ciblés par le projet. Le développement et la validation de la méthode d’analyse des HAP dans l’eau totale ont été réalisés. La méthode qui satisfait au mieux les exigences de la DCE en termes de concentrations et d’incertitudes accessibles est l’extraction en phase solide (SPE) sur un support disque suivie d’une analyse par dilution isotopique associée à la chromatographie en phase gazeuse couplée à la spectroscopie de masse (DI-CG/SM).
In 2011, the German Association of Engineers (VDI) started working on a set of guidelines dealing with the improvement of resource efficiency. These guidelines represent a framework that defines resource efficiency and outlines proposals for the producing industry. A special guideline for small and medium-sized enterprises (SMEs) is included as well as guidelines on methodologies for evaluating resource use indicators, such as the cumulative raw material demand of products and production systems. The work on resource use indicators is still in progress. The evaluation of raw materials expenditure will include water, soil and land use. The model will include the availability of raw materials (criticality). Improving resource efficiency at the end-of-life stage is illustrated in this paper by the example of materials recovery from waste, here from residues out of municipal solid waste incineration (MSWI). With mechanical treatment valuable materials like ferrous and non-ferrous metals and secondary construction material can be extracted from MSWI bottom ash. The potential contribution on the resource efficiency is discussed.
The reliable characterization of subsurface contamination of spatially extended contaminated sites is a challenging task, especially with an unknown history of land use. Conventional technologies often fail due to temporal and financial constraints and thus hinder the redevelopment of abandoned areas in particular. Here we compare two site screening techniques that can be applied quickly at relatively low cost, namely Direct Push (DP)-based groundwater sampling and tree core sampling. The effectiveness of both methods is compared for a rural megasite contaminated with chlorinated hydrocarbons. Unexpected pollution hot spots could be identified using both of these methods, while tree coring even enabled the delineation of the contaminant plume flowing into an adjacent wetland inaccessible for DP units. Both methods showed a good agreement in revealing the spatial pattern of the contamination. The correlation between groundwater concentrations and equivalent concentrations in wood was linear and highly significant for trichloroethene. Correlation was less obvious for its metabolite cis-dichloroethene, but still significant. As outcome of our study we recommend tree coring and for initial screening in combination with a DP sampling to retrieve quantitative data on groundwater pollutants in order to assess the contamination situation of a non- or only partly investigated site. The subsequent placement of monitoring wells for long-term monitoring of contamination levels is recommended. A combination of methods would achieve more relevant information at comparable or possibly even lower efforts in comparison to a conventional site investigation.
Die ökonomische Bewertung der immissionsbedingten Materialschäden der Sachgütergruppen Freileitungsmaste, Brücken der Bundesautobahnen, Eisenbahnbrücken und -fahrleitungsmaste, fernmeldetechnische Einrichtungen der Deutschen Bundespost, Industrieanlagen, Wohngebäude und Denkmäler basiert auf sogenannten „Stock-at-risk“-Informationen, Dosis-Wirkungs-Funktionen der der Atmosphäre ausgesetzten Werkstoffe und auf in der Praxis vorliegenden Erfahrungswerten über Zeitintervalle der Erneuerung der Korrosionsschutzsysteme und Bauteile. In jenen Fällen, in denen der immissionsbedingte Anteil am Gesamtschaden noch nicht eindeutig nachgewiesen werden konnte, werden die Forschungslücken aufgezeigt bzw. Modellrechnungen durchgeführt.