Affinity states of biocides determine bioavailability and release rates in marine paints

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Affinity states of biocides determine bioavailability and release rates in marine paints

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Publication Article, peer reviewed scientific
Title Affinity states of biocides determine bioavailability and release rates in marine paints
Author(s) Dahlström, Mia ; Sjögren, Martin ; Jonsson, Per R. ; Göransson, Ulf ; Lindh, Liselott ; Arnebrant, Thomas ; Pinori, Emiliano ; Elwing, Hans ; Berglin, Mattias
Date 2015
English abstract
A challenge for the next generation marine antifouling (AF) paints is to deliver minimum amounts of biocides to the environment. The candidate AF compound medetomidine is here shown to be released at very low concentrations, ie ng ml(-1) day(-1). Moreover, the release rate of medetomidine differs substantially depending on the formulation of the paint, while inhibition of barnacle settlement is independent of release to the ambient water, ie the paint with the lowest release rate was the most effective in impeding barnacle colonisation. This highlights the critical role of chemical interactions between biocide, paint carrier and the solid/aqueous interface for release rate and AF performance. The results are discussed in the light of differential affinity states of the biocide, predicting AF activity in terms of a high surface affinity and preserved bioavailability. This may offer a general framework for the design of low-release paint systems using biocides for protection against biofouling on marine surfaces.
DOI http://dx.doi.org/10.1080/08927014.2015.1012639 (link to publisher's fulltext)
Publisher Taylor & Francis
Host/Issue Biofouling : The Journal of Bioadhesion and Biofilm Research;2
Volume 31
ISSN 0892-7014
Pages 201-210
Language eng (iso)
Subject(s) antifouling biocides
release
suface adsorption
barnacle
ellipsometry
RP-HPLC
Sciences
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/19163 (link to this page)

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