title: Determination of diffusion coefficients of biocides on their passage through organic resin-based renders.
abstract: In this study the diffusion coefficients of isoproturon, diuron and cybutryn in acrylate and silicone resin-based renders were determined. The diffusion coefficients were determined using measuring concentrations of biocides in the liquid phase after being in contact with renders for specific time intervals. The mathematical solution of the transient diffusion equation for an infinite plate contacted on one side with a limited volume of water was used to calculate the diffusion coefficient. The diffusion coefficients through the acrylate render were 8.10·10(-9) m(2) s(-1) for isoproturon, 1.96·10(-9) m(2) s(-1) for diuron and 1.53·10(-9) m(2) s(-1) for cybutryn. The results for the silicone render were lower by one order of magnitude. The compounds with a high diffusion coefficient for one polymer had likewise high values for the other polymer.
authors.affiliation: AGH University of Science and Technology, Department of Coal Chemistry and Environmental Sciences, 30-059 Krakow, Al. Mickiewicza 30, Poland. Electronic address: styszko@agh.edu.pl.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Styszko
authors.affiliation: Cracow University of Technology, Faculty of Chemical Engineering and Technology, ul. Warszawska 24, 31-155 Krakow, Poland.
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Kupiec
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D004058:Diffusion; D004202:Disinfectants / Q000032:analysis* / Q000737:chemistry; D004237:Diuron / Q000737:chemistry; D008962:Models, Theoretical; D015394:Molecular Structure; D010671:Phenylurea Compounds / Q000737:chemistry; D012828:Silicones / Q000737:chemistry*; D012995:Solubility; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D000180:Acrylic Resins; D004202:Disinfectants; D010671:Phenylurea Compounds; D012828:Silicones; D014874:Water Pollutants, Chemical; C028904:isoproturon; D004237:Diuron
keywords: Biocides; Diffusion coefficient; Leaching; Render