Título: | ESPECIATION OF ORGANOTIN COMPOUNDS IN SURFACE SEDIMENTS OF TODOS OS SANTOS BAY | |||||||
Autor: |
JULIANA FEITOSA FELIZZOLA |
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Colaborador(es): |
ANGELA DE LUCA REBELLO WAGENER - Orientador ANA CRISTINA MARTINS ALMEIDA - Coorientador |
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Catalogação: | 01/AGO/2005 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | |||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=6723&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=6723&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.6723 | |||||||
Resumo: | ||||||||
The organotin compounds such as tributyltin (TBT) present
in anti-fouling paints
applied to ships, pleasure boats and vessels are proved to
have harmful effects on
the reproduction and the growth of several forms of marine
life. In response to this
environmental threat many countries introduced restriction
to their use or even
banishment. In Brazil there are no such rules on the use of
these compounds. The
present work aimed at the speciation of organotin compounds
(tributyltin (TBT)
and its of degradation products, dibutyltin (DBT) and
monobutyltin (MBT)) in
surface layer of sediments collected from 15 stations in
the Todos os Santos Bay.
The selection of stations was based on information on ship
traffic, presence of
marinas and industries installation. Organotin speciation
was carried out by gas
chromatography with pulsed flame photometric detection
after solvent extraction,
derivatization, clean-up and sulfur elimination. The
highest organotin
concentrations (ng g -1 as tin) found were: TBT (15,9), DBT
(28,8) e MBT (4).
Sediments in the studied locations are slightly
contaminated, according to the
classification reported by Waite and collaborators (1991).
Values are lower than
those found in Guanabara Bay (Almeida et al., 2004)
possibly due to the higher
water transparence that favors photo degradation, and to
the oxidizing
sedimentary environment.
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