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Leaching and Transformation of Film Preservatives in Paints Induced by Combined Exposure to Ultraviolet Radiation and Water Contact under Controlled Laboratory Conditions

Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12205 Berlin, Germany
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Academic Editor: Anas Ghadouani
Water 2021, 13(17), 2390; https://doi.org/10.3390/w13172390
Received: 23 June 2021 / Revised: 27 July 2021 / Accepted: 5 August 2021 / Published: 30 August 2021
Stormwater from urban areas can transport biocidally active substances and related transformation products from buildings into the environment. The occurrence of these substances in urban runoff depends on the availability of water, and on ultraviolet radiation exposure that causes photolytic reactions. In a systematic laboratory study, painted test specimens were exposed to either ultraviolet radiation, water contact, or a combination of both. Leaching of the biocidally active substances carbendazim, diuron, octylisothiazolinone, terbutryn, and selected transformation products of terbutryn and diuron were observed under various exposure conditions. Remaining concentrations of these substances in the paint were quantified. It was demonstrated that the distribution of active substances and transformation products in eluates and in the coatings themselves differs with exposure conditions. Strategies for environmental monitoring of biocide emissions need to consider the most relevant transformation products. However, environmental concentrations of biocidally active substances and transformation products depend on earlier exposure conditions. As a consequence, monitoring data cannot describe emission processes and predict expected leaching of biocidally active substances from buildings if the data are collected only occasionally. View Full-Text
Keywords: substance release; construction products; biocides; transformation; UV radiation; water contact substance release; construction products; biocides; transformation; UV radiation; water contact
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MDPI and ACS Style

Schoknecht, U.; Mathies, H.; Lisec, J. Leaching and Transformation of Film Preservatives in Paints Induced by Combined Exposure to Ultraviolet Radiation and Water Contact under Controlled Laboratory Conditions. Water 2021, 13, 2390. https://doi.org/10.3390/w13172390

AMA Style

Schoknecht U, Mathies H, Lisec J. Leaching and Transformation of Film Preservatives in Paints Induced by Combined Exposure to Ultraviolet Radiation and Water Contact under Controlled Laboratory Conditions. Water. 2021; 13(17):2390. https://doi.org/10.3390/w13172390

Chicago/Turabian Style

Schoknecht, Ute, Helena Mathies, and Jan Lisec. 2021. "Leaching and Transformation of Film Preservatives in Paints Induced by Combined Exposure to Ultraviolet Radiation and Water Contact under Controlled Laboratory Conditions" Water 13, no. 17: 2390. https://doi.org/10.3390/w13172390

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