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Título: REMOVAL OF ZINC AND CADMIUM USING ELECTROFLOTATION AND ELECTROCOAGULATION TECHNIQUE
Autor: RUI DE GOES CASQUEIRA
Colaborador(es): MAURICIO LEONARDO TOREM - Orientador
HELIO MARQUES KOHLER - Coorientador
Catalogação: 16/MAR/2005 Língua(s): PORTUGUESE - BRAZIL
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.
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
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.
Descrição: Arquivo:   
COVER, ACKNOWLEDGEMENTS, RESUMO, ABSTRACT, SUMMARY AND LISTS PDF      
CHAPTER 1 PDF      
CHAPTER 2 PDF      
CHAPTER 3 PDF      
CHAPTER 4 PDF      
CHAPTER 5 PDF      
CHAPTER 6 PDF      
CHAPTER 7 PDF  
CHAPTER 8 PDF      
CHAPTER 9 PDF      
CHAPTER 10 PDF      
CHAPTER 11 PDF  
CHAPTER 12 PDF      
REFERENCES AND APPENDICES PDF