Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.creatorBerta N. Estevinho
dc.creatorIsabel Martins
dc.creatorNuno Ratola
dc.creatorArminda Alves
dc.creatorLúcia Santos
dc.description.abstractChlorophenols are one of the most important groups of priority pollutants, due to their high toxicity, mutagenicity and carcinogenicity. Although activated carbon has been the preferred choice for the removal of such pollutants from wastewaters, the search for cheaper alternative sorbents became common in the last years. Fly ash, a by-product from coal burning power plants, has a surface composition that may enable the sorption of specific organic compounds. Therefore, this feasibility study presents the optimization of the operating parameters of a fixed-bed column containing fly ash particles, percolated by aqueous solutions of 2,4-dichlorophenol (2,4-DCP) and pentachlorophenol (PCP) with concentrations of 1 and 100 mu g/ml. Both chlorophenols were analysed by gas chromatography with electron capture detection (GC-ECD), after solid-phase microextraction (SPME), with limits of detection (LODs) of 7.28 mu g/l for 2,4-DCP and 1.76 mu g/l for PCR Removal efficiencies above 99% were obtained for an initial concentration of 10 mu g/ml of chlorophenols. Column saturation was achieved after 7 h of continuous operation for 2,4-DCP and 10 h for the PCP for feed levels of 10 mu g/ml. Fly ash exhibited more affinity towards the sorption of PCP, in comparison to 2,4-DCP.
dc.subjectEngenharia civil
dc.subjectCivil engineering
dc.titleRemoval of 2,4-dichlorophenol and pentachlorophenol from waters by sorption using coal fly ash from a Portuguese thermal power plant
dc.typeArtigo em Revista Científica Internacional
dc.contributor.uportoFaculdade de Engenharia
dc.subject.fosCiências da engenharia e tecnologias::Engenharia civil
dc.subject.fosEngineering and technology::Civil engineering
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

Files in This Item:
File Description SizeFormat 
  Restricted Access
pdf277.99 kBAdobe PDF    Request a copy from the Author(s)

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.