Urban activity and mercury contamination in estuarine and marine sediments (Southern Brazil)
| Autor: | Evgueni Shumilin, Lauro Calliari, Ester Loitzenbauer, Paulo Roberto Martins Baisch, Nicolai Mirlean |
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| Rok vydání: | 2008 |
| Předmět: |
Geologic Sediments
Monitoring chemistry.chemical_element Fresh Water Management Monitoring Policy and Law Urban area Patos Lagoon (Brazil) Estuarine sediments Dredging Seawater Cities Water pollution General Environmental Science Hydrology geography geography.geographical_feature_category Geography Urbanization Estuary Mercury General Medicine Particulates Pollution Mercury (element) Kinetics Navigation canal Coastal marine sediments Oceanography chemistry Brazil Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental Monitoring and Assessment. 157:583-589 |
| ISSN: | 1573-2959 0167-6369 |
| Popis: | The distribution of mercury in sediments of the Patos Lagoon estuary and nearby coastal marine deposits has been investigated for the period 1998-2008. Polluted urban soils and coastal reclamation fills are the principal sources of high mercury concentrations for shallow estuarine sediments. The shallow sediments that form near the urban area enter the navigation canal and are transported into the ocean. The mercury concentration in sediments of the navigation canal has considerably increased since 2004, due to intense reconstruction activity in the urban area. Periodic dredging of the canal strengthens the preconditions for coastal marine sediment contamination by mercury. However, this does not occur because the resuspended dredged sediments are significantly diluted by natural suspended particulate matter. |
| Databáze: | OpenAIRE |
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