Adsorption of pesticides on porous polymeric adsorbents

Kyriakopoulos, G; Doulia, D; Anagnostopoulos, E

dc.contributor.author	Kyriakopoulos, G	en
dc.contributor.author	Doulia, D	en
dc.contributor.author	Anagnostopoulos, E	en
dc.date.accessioned	2014-03-01T01:21:47Z
dc.date.available	2014-03-01T01:21:47Z
dc.date.issued	2005	en
dc.identifier.issn	0009-2509	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16375
dc.subject	Adsorption	en
dc.subject	Chromatography	en
dc.subject	Heat of adsorption	en
dc.subject	Pesticides	en
dc.subject	Pollution	en
dc.subject	Porous media	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Adsorption	en
dc.subject.other	Parameter estimation	en
dc.subject.other	pH effects	en
dc.subject.other	Polymers	en
dc.subject.other	Resins	en
dc.subject.other	Thermal effects	en
dc.subject.other	Adsorbent resins	en
dc.subject.other	Adsorption constants	en
dc.subject.other	Porous polymeric adsorbents	en
dc.subject.other	Pesticides	en
dc.subject.other	porous medium	en
dc.title	Adsorption of pesticides on porous polymeric adsorbents	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ces.2004.09.080	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ces.2004.09.080	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	The adsorption of herbicides alachlor, amitrole, trifluralin and prometryn on porous polymeric adsorbents has been studied. Two adsorbent resins were investigated, the highly hydrophobic Amberlite XAD-4 (polystyrene-divinylbenzene copolymer) and the functionalized more hydrophilic XAD-7 (nomonic aliphatic acrylic polymer). Equilibrium adsorption experiments using buffered aqueous solutions were conducted to estimate the types of isotherms and their parameters. The effect of chemical composition and structure of the herbicides, was investigated. The pH range studied was 3-6.5, the temperature range was 288-303 K and the ionic strength was maintained at 0.01 M. Adsorption isotherms seemed generally to approach the Langmuir or Freundlich isotherm model and can be characterized by temperature and pH dependent apparent adsorption equilibrium constants, characteristic of the adsorbent-adsorbate system. By studying the dependence of temperature of this adsorption constant, heats of adsorption have been estimated from van't Hoff law. In the case of trifluralin and prometryn adsorption on both resins and amitrole adsorption on XAD-4 resin, the heats of adsorption were negative (8.1-33.6 kcal/mol). On the contrary, in alachlor adsorption on both resins and amitrole adsorption on XAD-7 resin, the estimated heats of adsorption were positive. (C) 2004 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Chemical Engineering Science	en
dc.identifier.doi	10.1016/j.ces.2004.09.080	en
dc.identifier.isi	ISI:000226769600024	en
dc.identifier.volume	60	en
dc.identifier.issue	4	en
dc.identifier.spage	1177	en
dc.identifier.epage	1186	en