Assessment of a coastal lagoon metal distribution through natural and anthropogenic processes (SE, Brazil). (September 2019)

• Record Type: Journal Article
• Authors: Beraldi, Gaby Quintal F.; de Rezende, Carlos Eduardo; de Almeida, Marcelo Gomes; Carvalho, Carla; de Lacerda, Luiz Drude; de Farias, Roberto Nascimento; Vidal, Marcella; Souza, Michael Douglas P.; Molisani, Mauricio Mussi
• Is Part Of: Marine pollution bulletin. Volume 146(2019)
• Page Start: 552
• Page End: 561
• Publication Date: 2019-09
• Subjects: Domestic sewage -- Contamination -- Sedimentation rate -- Mass-balance -- Fish -- Aquatic macrophyte; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2019.07.007
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: The present study intends to assess the metal pollution of a eutrophic coastal lagoon, analyzing the long-term and actual metal content in surface sediments, suspended particles, aquatic macrophyte and fish species, and the loads emitted from natural processes and anthropogenic sources, including the relative emission of domestic untreated sewage. Distribution indicated contamination of suspended particles with Cd and the predominance of Pb in the bioavailable form in surface sediments which may explain Cd and Pb contamination in fish. Domestic untreated sewage was an important source of Cu and due to the lagoon's management, this source may be increasing the metal content in the lagoon's surface sediments. Soil loss, atmospheric deposition and solid waste disposal also contributed to metal inputs to the lagoon. Extensive contamination has been prevented by the lagoon's management such as sandbar opening. Metal retention within the watershed soils reduce the effective metal transference and lagoon pollution. Highlights: Tropical coastal lagoon was threat by metal contamination. Soil, atmospheric deposition, solid waste and sewage were the main metal sources. Suspended particle and bottom sediment were pathways of Cd and Pb fish contamination. Metal retention in soil reduced the extensive metal transference into the lagoon. Extensive contamination has also been prevented by the lagoon's sandbar opening.