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Mar Pollut Bull ; 166: 112252, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-33735705

RESUMO

The aim of this study was to evaluate the regeneration of nutrients from the sediments to the water column in varying salinities, with an innovative experiment that closely simulates real environment. In vitro experiments were carried out simulating six scenarios with two sediment types (low carbonate and high carbonate). Local water and sediments were added to microcosms where circulation was forced. Results showed nitrogen release from low carbonate sediment in the lagoon, mixed and seawater (1.69, 4.68 and 7.36 µmol m-2 day-1, respectively). Phosphate diffusive fluxes were positive in lagoon water and low carbonate sediment (2.24 µmol m-2 day-1), negative with mixed water (-0.30 µmol m-2 day-1) and seawater (-0.51 µmol m-2 day-1). A phosphate release surge was observed in the low-carbonate sediment with overlying mixed water and seawater that, in the natural environment, may boost primary production.


Assuntos
Sedimentos Geológicos , Poluentes Químicos da Água , Nitrogênio/análise , Nutrientes , Fósforo , Água do Mar , Poluentes Químicos da Água/análise
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