Changes in Cd and Zn distribution in sediments after closure of an electroplating industry, Sepetiba bay, Brazil
| Autor: | Josefa Varela Guerra, Sarah K. Rodrigues, Mauro Cesar Geraldes, Shéron Joyce Díaz Morales, Wilson Machado, Susana B. Vinzon |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Geologic Sediments Environmental remediation 010604 marine biology & hydrobiology Sediment 010501 environmental sciences Aquatic Science Contamination Oceanography 01 natural sciences Pollution Electroplating Zinc Environmental chemistry Metals Heavy Environmental monitoring Environmental science Bay Brazil Water Pollutants Chemical 0105 earth and related environmental sciences Cadmium Environmental Monitoring |
| Zdroj: | Marine pollution bulletin. 161 |
| ISSN: | 1879-3363 |
| Popis: | The spatiotemporal attenuation of Cd and Zn concentrations was assessed in sediments from Sepetiba Bay, which is a coastal system that has been historically impacted by industrial wastes. The evolution of contamination over the years shortly before and after cessation of electroplating industry activities, by the end of 1990's, was elucidated by reviewing the existing datasets for the whole bay area. Metal concentrations exceed Brazilian Sediment Quality Guidelines in most regions, corresponding to concentrations 3 to 4 orders of magnitude higher than background levels and Enrichment Factors reaching values significantly higher than 40 for both elements. In the second decade after electroplating industry closure, the levels of Cd and Zn lowered in most regions of the bay. However, an increase in the relative importance of diffuse sources can mislead the current and future identification of Cd and Zn input, bringing new challenges for environmental monitoring and management for Sepetiba bay. |
| Databáze: | OpenAIRE |
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