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Publicação
Descontaminação de águas poluídas com compostos fenólicos utilizando discos de C18
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Resumo(s)
The objective of this study was to test a solid phase extraction technique (SPE) for the
decontamination of water contaminated with phenolic compounds.
For this purpose, C18 discs were used as adsorbents and UV-Vis spectrometry, at 25 ºC, as the
analytical technique to monitor the removal of pollutants from water.
The kinetics of adsorption was studied for 10 phenol derivatives by monitoring the change in
absorbance of each solution with time. This allowed the determination of the equilibrium constant (Keq)
and the adsorption (kup) and desorption (koff) rate constants for each system. The 10 compounds
analyzed were: 2-ethylphenol, 4-ethylphenol, 2-iodophenol, 4-iodophenol, 2-chlorophenol, 3-
chlorophenol, 4-chlorophenol, 2-bromophenol, 3-bromophenol and 4-bromophenol.
In the sequence of previous studies carried out at the Structure and Reactivity Group of CQB,
University of Lisbon, this work intends to give a contribution for the optimization of the extraction
process of phenols from waters by means of SPE using C18 discs, thus increasing the range of
compounds analyzed and allowing the assessment of this technique’s effectiveness towards a broader
set of pollutants.
This SPE methodology is proposed as a simple, relatively efficient and cost-effective alternative for the
purification and treatment of water, with low economic and environmental costs.
Descrição
Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia
Palavras-chave
phenol derivatives solid phase extraction C18 discs water pollutants
Contexto Educativo
Citação
Castro, L.F.D.S. - Descontaminação de águas poluídas com compostos fenólicos utilizando discos de C18. Lisboa: ISA, 2013, 116 p.