1. Centre for Coastal Biogeochemistry Research, School of Environment, Science and Engineering; Southern Cross University; Lismore New South Wales Australia
2. Geochemistry Department; Universidade Federal Fluminense; Niterói Brazil
3. Geoscience Institute; Universidade Estadual de Campinas; Campinas Brazil
4. Department of Environmental Science, Policy and Geography; University of South Florida; St. Petersburg Florida USA
5. College of Marine Science; University of South Florida; St. Petersburg Florida USA
6. Department of Chemistry and Biochemistry; Northern Arizona University; Flagstaff Arizona USA
7. Now at Department of Chemistry; Metropolitan State University of Denver; Denver Colorado USA
8. Sedimentary and Environmental Processes Laboratory, Geography Department, Institute of Geosciences; Universidade Federal Fluminense; Niterói Brazil