ETDs @PUC-Rio
| Título: | BIOSORPTION OF CADMIUM BY COCOS NUCIFERA: BATCH AND CONTINUOUS STUDIES | ||||||||||||||||||||||||||||||||||||||||
| Autor: |
GABRIELA ALEJANDRA HUAMAN PINO |
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| Colaborador(es): |
MAURICIO LEONARDO TOREM - Orientador |
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| Catalogação: | 18/JAN/2010 | 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=14989&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=14989&idi=2 |
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| DOI: | https://doi.org/10.17771/PUCRio.acad.14989 | ||||||||||||||||||||||||||||||||||||||||
| Resumo: | |||||||||||||||||||||||||||||||||||||||||
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Cadmium is one of the greatest actors of environmental pollution due to its
high toxicity, threatening plants, animals and humans beings. The use of biomass
as a sorbent material for cadmium removal seems to be a promising alternative
to existing technologies. The objective of this work was to determine the
adsorption capacity of coconut shell powder (Cocos nucifera) for cadmium in a
continuous system of biosorption, and also the desorption of the metal from the
biomass, so that this material could be used in a new cycle of biosorptiondesorption.
A fixed bed column was chosen, as it does not present clogging
problems and is easy to operate. The influence of flow rate and its direction, bed
height and the efficiency of the process with series columns were evaluated. The
functional groups present on the surface of the biomass were studied by infrared
spectroscopy analysis.The column experiments with different bed heights and
initial concentration revealed that the best efficiency was obtained with higher
bed heights (18 cm) and lower initial concentrations (19 mg/l). Breakthrough time
of 150 minutes was obtained for solutions with a flow rate of 22 ml/min,
generating a solution with final concentration of 2.6 mg/l. A removal efficiency of
46% was obtained when working with initial concentrations of 19 mg/l. The
process becomes more efficient when the solution is pumped upward through the
columnEDTA was an excellent elutant for desorption of metal ions in the biomass
in a batch system. The biomass was subjected to four biosorption-desorption
cycles, presenting higher than 70% desorption efficiencies and removal
efficiencies of more than 85% in all cases.The functional groups presents on the
particle surface of the biomass are mainly carboxyl, hydroxyl, amine and amide
groups. The results show that the powder of coconut shell has the appropriate characteristics for biosorption of cadmium in a continuous process using columns
of fixed bed, which can be used as an alternative to conventional processes for
effluent decontamination.
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