Release and chemical speciation of copper from anti-fouling paints with different active copper compounds in artificial seawater
2007 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 58, no 3, 165-172 p.Article in journal (Refereed) Published
Release rates of total copper in artificial seawater (without organic matter) from anti-fouling paints of different active copper compounds range from 0.5 to 75 μg cm-2 day-1. Approximately 80% of the released total copper was determined to be electrochemically active (labile fraction) for all paints investigated. The remaining fraction is more strongly bonded non-bioavailable copper complexes with species released from the paints. Model calculations, using MinteqA2, predicted only a small portion (≈6%) of the total copper released as free cupric ions (Cu(H2O) 62+), the most bioavailable form of copper. Similar results were obtained with bioassay testing using bacteria and yeast on released copper from massive copper sheet exposed at identical conditions. The large difference between the total and the bioavailable copper fraction emphasizes the importance of generating chemical speciation data for accurate decisions of potential adverse effects of copper release from antifouling paints. The observed release of other metals and organic substances from the paint matrix, implies the importance to assess an integrated response from released species from paints of antifouling, and not only from single ingredients.
Place, publisher, year, edition, pages
2007. Vol. 58, no 3, 165-172 p.
Antifouling paint, Biological materials, Chemical speciation, Copper compounds, Electrochemistry, Seawater
IdentifiersURN: urn:nbn:se:kth:diva-5996DOI: 10.1002/maco.200604002ISI: 000245700500001ScopusID: 2-s2.0-34547152794OAI: oai:DiVA.org:kth-5996DiVA: diva2:10559
QC 20100928. Uppdaterad från Submitted till Published (20100928).2006-06-142006-06-142010-09-28Bibliographically approved