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2. Mercury methylation upon coastal sediment resuspension: a worst-case approach under dark conditions

Author

Christiane N, Monte, Ana Paula C, Rodrigues, Petrus M A, Galvão, Gabriela C, Pontes, Olaf, Malm, Júlio C, Wasserman, and Wilson, Machado

Subjects
Geologic Sediments, Water, Mercury, Alkalies, Methylmercury Compounds, Methylation, Brazil, Water Pollutants, Chemical, Environmental Monitoring
Abstract

Mercury behavior upon resuspension of sediments from two impacted areas of Guanabara Bay was evaluated to assess worst-case methylmercury (MeHg) responses, under dark experimental conditions to prevent demethylation by photolysis. Study areas include the Rio de Janeiro Harbor (RJH) and the chlor-alkali plant-affected Meriti River (MR) estuary. Total mercury (THg) and MeHg concentrations were determined along 24-h experiments of sediment resuspension in the bay water in dark conditions. Fine-grained Meriti River (MR) estuary sediments had 8 times higher MeHg initial concentrations than sandy Rio de Janeiro Harbor (RJH) sediments (3.4 ± 0.29 vs. 0.41 ± 0.1 ng g

Published
2022

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