Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-38236 Beitrag zu einem Tagungsband Schoknecht, Ute; Mathies, Helena; Wegner, R.; Uhlig, S.; Baldauf, H.; Colson, B. Leaching of biocides from organic coatings Biocide leaching was investigated for acrylate and vinyl acetate based coatings containing biocides either as liquid formulations or microcapsules. Laboratory and field tests indicate similar relations of results on carbendazim, diuron, terbutryn and OIT from different coatings in laboratory and field experiments. Emissions were higher in EN 16105 laboratory tests than from vertically installed test specimens exposed to weathering, and slower for microencapsulated biocides. Competing processes that cause losses of active substances can occur in both tests, but to a higher degree in field experiments. Emission curves related to runoff water were similar in repeated field experiments. Relative humidity, temperature and global radiation were identified as meteorological factors that affect leaching by complex interaction besides the amount of driving rain. Institute for Engineering of Polymer Materials and Dyes, Paint and Plastics Department, Gliwice, Poland 2016 Proceedings of the 12th International Conference 'Advances in Coatings Technology' ACT ´16 978‒83‒63555‒50‒4 12th International Conference 'Advances in Coatings Technology ACT´16' Sosnowiec, Poland 08.11.2016 10.11.2016 Paper 51, 1 10 2016-11-14 OPUS4-38909 Zeitschriftenartikel Schoknecht, Ute; Mathies, Helena; Wegner, R.; Uhlig, S; Baldauf, H.; Colson, B Leaching of biocides from organic coatings Biocide leaching was investigated for acrylate and vinyl acetate based coatings containing biocides either as liquid formulations or microcapsules. Laboratory and field tests indicate similar relations of results on carbendazim, diuron, terbutryn and OIT from different coatings in laboratory and field experiments. Emissions were higher in EN 16105 laboratory tests than from vertically installed test specimens exposed to weathering, and slower for microencapsulated biocides. Competing processes that cause losses of active substances can occur in both tests, but to a higher degree in field experiments. Emission curves related to runoff water were similar in repeated field experiments. Relative humidity, temperature and global radiation were identified as meteorological factors that affect leaching by complex interaction besides the amount of driving rain. Instytut Inzynierii Materialow Polimerowych i Barwnikow 2016 Farby i lakiery (Paints and Varnishes) 4 3 9 2017-01-09 OPUS4-35513 Forschungsbericht Schoknecht, Ute; Mathies, Helena; Wegner, R.; Uhlig, S.; Baldauf, H.; Colson, B. Emissions of material preservatives into the environment - realistic extimation of environmental risks through the improved characterisation of the leaching of biocides from treated materials used outdoors This report supports the implementation of European regulations on biocidal products for the product types 7, 9 and 10. Emission of active substances from material preservatives into environmental compartments can occur due precipitation. Risk characterisations have to be based on estimations of environmental concentrations of target substances leached from material preservatives. Harmonised test procedures are required to predict environmental impact due to leaching. Seventeen treated articles, mainly paints, but also a textile, sealing tapes and sealing masses were investigated by intermittent contact to water to prove suitability of the proposed laboratory test procedure. Parameters that affect leaching of active substances were examined. Further development of a semi-analytical model to describe laboratory leaching data revealed that the model can be improved if changes of the leachability of substances during the test are supposed and integrated. Six paints and a textile were exposed to weathering to compare results from laboratory and field experiments. Similarities between leaching processes in both test approaches were observed. Generally, emissions of active substances are considerably higher in laboratory tests than from vertically installed test specimens exposed to weathering. Competing processes that cause losses of active substances can occur in both tests, but to a higher degree in field experiments. In addition, the influence of meteorological parameters on leaching processes was investigated. Factors besides the amount of driving rain were identified that effect leaching processes by complex interaction. Relations between laboratory and field data were analysed, and the applicability of the semi-analytical model was tested for field data. Guidance documents for leaching tests under laboratory and field conditions were drafted and discussed with experts on EU Level workshop 3./4. July 2014, BAM, Berlin), and are included in this Report. Umweltbundesamt 2016 1 136 urn:nbn:de:kobv:b43-355139 http://www.gesetze-im-internet.de/urhg/index.html 2016-03-17 OPUS4-41027 Forschungsbericht Brandes, E.; Colson, B.; Frost, K.; Lüth, Peter; Simon, K.; Stolz, T.; Uhlig, S. Evaluation of the interlaboratory test 2015 - 2016 on the method UN Test L.2 "Sustained combustibility test" / EN ISO 9038:2013 "Determination of sustained combustibility of liquids" The test methods UN Test L.2 / EN ISO 9038:2013 DIN EN 15188:2007 are applied to characterize the sustained combustibility of liquids i.e. the behaviour of a material under specified test conditions, whereby its vapour can be ignited by an ignition source and sufficient flammable vapour is produced to continue burning for at least 15 s after the source of ignition has been removed. The aims of this interlaboratory test (IT) are the verification and/or the improvement (if necessary) of the verification data (reference material) in Annex B of EN ISO 9038:2013, the assessment of influencing (disturbing) factors (laboratory specific factors, which possibly may have an influence on the test result) and the assessment of the performance of the participating laboratories. It could be demonstrated that the reference materials n-Dodecane, n-Decane and n-Undecane as mentioned in the standard are suitable and the verification shall continue to be valid. Sustained combustibility tests are influenced by several factors like the presence of a draught shield, the experience of the laboratory assistant, verification of the apparatus, calibration of the metering device. Based on the interlaboratory test, the gained experience and the actual results, well-founded measures / actions can be recommended to improve execution of the method. The IT was organized by PTB, BAM and QuoData GmbH in the framework of the co-operation project CEQAT-DGHS Centre for Quality Assurance for Testing of Dangerous Goods and Hazardous Substances. Berlin Bundesanstalt für Materialforschung und -prüfung (BAM) 2017 978-3-9818270-3-3 1 103 urn:nbn:de:kobv:b43-410270 http://creativecommons.org/licenses/by-nc-nd/3.0/de/deed.de 2017-07-17 OPUS4-47886 Zeitschriftenartikel Uhlig, S.; Colson, B.; Schoknecht, Ute A mathematical approach for the analysis of data obtained from the monitoring of biocides leached from treated materials exposed to outdoor conditions Leaching processes are responsible for the release of biocides from treated materials into the environment. Adequate modeling of emission processes is required in order to predict emission values in the framework of the risk assessment of biocidal products intended for long-term service life. Regression approaches have been applied to data obtained from the long-term monitoring of biocide emissions in experiments involving semi-field conditions. Due to the complex interaction of different underlying mechanisms such as water and biocide diffusion and desorption, however, these attempts have proven to be of limited usefulness e at least, for the available biocide emission data. It seems that the behavior of the biocide emission curve depends to a considerable extent on whichever underlying mechanism is slowest at a given point in time, thus limiting the amount of biocide available for release. Building on results obtained in the past few years, the authors propose a criterion for determining which mechanism controls the leaching process at a given point in time based on the slope of the log-log emission curve. In addition, a first-order approximation of this slope value is presented which displays advantages both in terms of computability and interpretability. Finally, an algorithm for the determination of breakpoints in the slope of the log-log emission curve is presented for the demarcation of phases within which one mechanism acts as a limiting factor. Elsevier 2019 Chemosphere 228 271 277 10.1016/j.chemosphere.2019.04.102 2019-05-06