Ed Hathorne, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany, Natan Pereira, State University of Bahia, Department of Chemistry, Salvador, Brazil, Miguel O. S. Santos, State University of Bahia, Salvador, Brazil and Vanessa Hatje, UFBA Federal University of Bahia, Salvador, BRAZIL; IAEA Marine Environment Laboratories, Department of Nuclear Sciences and Applications, Monaco, Monaco