Elemental analysis of Ostreopsis ovata microalgae by EDXRF technique
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2024
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ENCONTRO DE PRIMAVERA DA SOCIEDADE BRASILEIRA DE FISICA, 4.
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Ostreopsis ovata is a toxic marine benthic dinoflagellate responsible for harmful blooms
affecting ecosystem and human health. This microalgae was first observed in France
(1972). Originating in tropical areas, they are believed to have reached temperate regions of
the planet due to climate change. Now they are regularly also found in subtropical regions
of the globe, including the Brazilian coast and in summertime along the Mediterranean
coastlines of France, Italy and Spain. If climatic conditions are favorable, Ostreopsis ovata
proliferates and releases a toxin that can harm marine biodiversity and infect swimmers and
those who practice water sports. When present in large quantities during flowering, these
toxins can be assimilated by the trophic chain, presenting risks of poisoning in marine and
human organisms (via the respiratory or food route). Symptoms caused in humans can
include fever, difficulty breathing and conjunctivitis, in the case of airborne exposure, even
neurological disorders. Aiming to make the proliferation of harmful algae in Brazilian
coastal and marine ecosystems understandable, this microalgae was investigated by XRF
technique. Samples from Arraial do Cabo region (a coastal city in the Lakes Region of the
state of Rio de Janeiro) were analyzed using a X- Ray spectrometer (X-123 SDD, Amptek)
constituted by a SDD detector coupled a mini X-ray tube . The measurements were
performed using Au, Ag and Rh targets. These data are the first estimates of the
multielemental scope and provide knowledge about its toxicity.
Como referenciar
BENEDITO, MARIA G.M.; GOES, MARIA P. de O.; MIURA, VIVIANE M.; ZANIN, THALES; GIOVANNI, DALTON; ZAMBONI, CIBELE B. Elemental analysis of Ostreopsis ovata microalgae by EDXRF technique. In: ENCONTRO DE PRIMAVERA DA SOCIEDADE BRASILEIRA DE FISICA, 4., 24-27 de setembro, 2024, Belo Horizonte, MG. Resumo... São Paulo, SP: Sociedade Brasileira de Física - SBF, 2024. Disponível em: https://repositorio.ipen.br/handle/123456789/49136. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.