BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
A New Approach for the Extraction of Pollutants from Wastewaters Handled by the Graphic Industry

Participants in the publication
C. Monteiro (Author)
C. Ventura (Author)
F. Martins (Author)
Dep. Química e Bioquímica
CQB

Summary
It is widely recognized that the Graphic Industry handles toxic products and produces, in its various operations, toxic wastes. These wastes can cause serious environmental damages and can lead to severe health problems.\\n\\nIn this work we report an efficient, simple and cheap to run method for the removal of some of the most common pollutants involved in the various stages of the Graphic Industry production, using a Solid-Phase Extraction (SPE) methodology. We have determined equilibrium constants, Keq, and adsorption (kup) and desorption (koff) rate constants for the extraction of benzene, xylene, toluene and ethylbenzene (BXTE) from water, using C18 disks. The removal of these compounds was monitored by UV–vis spectroscopy, at room temperature. Average extraction efficiencies were of 60% in a mixture of BXTEs and close to 80% when pollutants were assessed separately.\\n\\nSince the retention mechanism in the C18 disk is essentially governed by hydrophobic interactions between the compounds and the alkyl chains of the disk, we have also shown that these pollutants' lipophilicity plays an important role in the rationalization of their behavior during the extraction process.


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
Journal of Environmental Management

Publication Identifiers

Publisher
Elsevier BV



Document Identifiers
DOI - https://doi.org/10.1016/j.jenvman.2013.01.039
URL - http://dx.doi.org/10.1016/j.jenvman.2013.01.039

Rankings
SCIMAGO Q1 (2013) - 1.203 - Waste Management and Disposal
Web Of Science Q2 (2013) - 2.105 - Environmental Sciences

Keywords
Solid-phase extraction C18 disks Pollutants BXTE Graphic industry