Título: | REMOVAL OF ZINC AND CADMIUM USING ELECTROFLOTATION AND ELECTROCOAGULATION TECHNIQUE | |||||||
Autor: |
RUI DE GOES CASQUEIRA |
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Colaborador(es): |
MAURICIO LEONARDO TOREM - Orientador HELIO MARQUES KOHLER - Coorientador |
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Catalogação: | 16/MAR/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=6095&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=6095&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.6095 | |||||||
Resumo: | ||||||||
The removal of heavy metals from diluted aqueous solutions
(in the range of 10-3 to 10-4 models.dm-3) do not produce
good results using classical methods which cant t reach
enough removal efficiency in agreement with environmental
quality standards. The use of ionic flotation as an
efficient method to remove heavy metals has been studied as
a promising technique to treat large amount of effluents in
a relatively small units which may be used combined with
others techniques a coagulation. The use of
electroflotation joins some advantages to the flotation
process, mainly due the small bubble size formed on the
electrodes surface. The electrocoagulation, applied with
the electroflotation, has been studied as a complementary
operation working with the electroflotation. The aim of
this work was to project and build an
electroflotation/electrocoagutation experimental unitm some
of its important variables and the influence of its
variables in the removal of zinc and cadmium from synthetic
solutions wich contains 20 mg.l-4 of each metal
concentration and sodium dodecil sulphate (SDS) as an
anionic collector. The influence of some important
parameters: pH, collectos concentrations, tension, current
density and ionic strength were analyzed. An introduction
of a pair of electrodes of aluminum and stainless steel to
produce the coagulant agents was also investigated to bring
the electrocoagulation of the particles. The results showed
that the experimental unit can bring satisfactory results
of removal of the metals withim the range studied. In the
best results, 96 percent of removal of cadmium was obtained using
SDS as a collector in stoichiometric proportion equal to
three and inlet pH around seven.
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