New insights into the interactions between cork chemical components and pesticides. The contribution of π-π interactions, hydrogen bonding and hydrophobic effect
dc.contributor.author
dc.date.accessioned
2015-09-17T08:24:20Z
dc.date.available
2015-09-17T08:24:20Z
dc.date.issued
2015-01
dc.identifier.issn
0045-6535
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dc.description.abstract
The role of chemical components of cork in the sorption of several pesticides has been investigated. For this purpose raw cork and three cork extracted fractions (i.e. cork free of aliphatic extractives, cork free of all extractives and cork free of all extractives and suberin) were used as sorbent of three ionic pesticides (propazine, 2,4-dichlorophenoxy acetic acid (2,4-D) and alachlor) and five non-ionic pesticides (chlor-pyrifos, isoproturon, metamitron, methomyl and oxamyl) with a logK(ow) within the range -0.47 to 4.92. The effect of cations on the ionic pesticides, propazine and 2,4-D sorption was also analyzed. Results indicated that the highest yields were obtained for chlorpyrifos and alachlor sorption onto raw cork (>55%). After removal of aliphatic extractives sorption of all pesticides increased that ranged from 3% for propazine to 31% for alachlor. In contrast, removal of phenolic extractives caused a sorption decrease. Low sorption yields were obtained for hydrophobic pesticides such as metamitron, oxamyl and methomyl (<11%) by using all cork fractions and extremely low when using raw cork (<1%). FTIR analysis was useful to indicate that lignin moieties were the main components involved on the sorption process. Modelling calculations evidenced that pi-stacking interactions with the aromatic groups of lignin play a major role in determining the adsorption properties of cork toward aromatic pesticides. Results presented in this paper gain insights into the cork affinities for pesticides and the interactions involved in the sorption process and also enables to envisage sorption affinity of cork for other organic pollutants
dc.description.sponsorship
This research was funded by the Spanish Ministry of Science and Innovation as part of the projects CTM2010-15185 and CTM2012-37215-C02-01
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application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
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info:eu-repo/grantAgreement/MINECO//CTM2012-37215-C02-01/ES/DESARROLLO DE TECNOLOGIA A ESCALA PILOTO PARA DEPURACION DE AGUAS CONTAMINADAS CON IONES METALICOS MEDIANTE RESIDUOS AGROALIMENTARIOS/
info:eu-repo/grantAgreement/MICINN//CTM2010-15185/ES/INVESTIGACION DEL PAPEL DE LOS BIOPOLIMEROS EN LA SORCION DE CONTAMINANTES ORGANICOS. ESTUDIO DEL CORCHO COMO NUEVO BIOSORBENTE./
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Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.chemosphere.2014.08.051
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© Chemosphere, 2015, vol. 119, p. 863-870
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Articles publicats (D-EQATA)
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Tots els drets reservats
dc.subject
dc.title
New insights into the interactions between cork chemical components and pesticides. The contribution of π-π interactions, hydrogen bonding and hydrophobic effect
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
022521
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dc.relation.ProjectAcronym