Removal of amino acids from water by adsorption on polystyrene resins

Doulia, D; Rigas, F; Gimouhopoulos, C

dc.contributor.author	Doulia, D	en
dc.contributor.author	Rigas, F	en
dc.contributor.author	Gimouhopoulos, C	en
dc.date.accessioned	2014-03-01T01:17:01Z
dc.date.available	2014-03-01T01:17:01Z
dc.date.issued	2001	en
dc.identifier.issn	0268-2575	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14325
dc.subject	Amino acids	en
dc.subject	Equilibrium adsorption	en
dc.subject	Polystyrene-divinylbenzene resin	en
dc.subject.classification	Biotechnology & Applied Microbiology	en
dc.subject.classification	Chemistry, Multidisciplinary	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	amberlite xad 4 resin	en
dc.subject.other	amberlite xad resin	en
dc.subject.other	amino acid	en
dc.subject.other	asparagine	en
dc.subject.other	leucine	en
dc.subject.other	lysine	en
dc.subject.other	methionine	en
dc.subject.other	phenylalanine	en
dc.subject.other	polystyrene derivative	en
dc.subject.other	resin	en
dc.subject.other	threonine	en
dc.subject.other	tryptophan	en
dc.subject.other	tyrosine	en
dc.subject.other	adsorption	en
dc.subject.other	amino acid	en
dc.subject.other	polystyrene	en
dc.subject.other	removal	en
dc.subject.other	resin	en
dc.subject.other	water	en
dc.subject.other	adsorption	en
dc.subject.other	article	en
dc.subject.other	chemical analysis	en
dc.subject.other	chemical composition	en
dc.subject.other	chemical reaction kinetics	en
dc.subject.other	chemical structure	en
dc.subject.other	concentration (parameters)	en
dc.subject.other	ionic strength	en
dc.subject.other	pH	en
dc.subject.other	thermostability	en
dc.subject.other	water treatment	en
dc.title	Removal of amino acids from water by adsorption on polystyrene resins	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/1097-4660(200101)76:1<83::AID-JCTB345>3.0.CO;2-N	en
heal.identifier.secondary	http://dx.doi.org/10.1002/1097-4660(200101)76:1<83::AID-JCTB345>3.0.CO;2-N	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	The adsorption of eight amino acids, L-asparagine, D,L-threonine, L-lysine, L-leucine D,L-methionine, L-tyrosine, L-phenylalanine and D,L-tryptophan, on the non-polar macroporous adsorbents Amberlite XAD-2 and XAD-4 (polystyrene-divinylbenzene copolymers) was studied. Equilibrium adsorption experiments were conducted to estimate the types of isotherm and their parameters. The effect the chemical composition and structure of the amino acids on the efficiency of adsorption was evaluated. The influence of pH and ionic strength was also studied. The data of adsorption isotherms of the examined amino acids seemed generally to approach the Freundlich isotherm model. Tryptophan isotherm adsorption data could match in some cases the Langmuir model. The majority of the adsorption isotherms were almost linear. In terms of adsorbed amino acid on both resin surfaces, the amino acids can be ranked thus: D,L-tryptophan > L-phenylalanine > D,L-methionine, L-tyrosine > L-leucine > L-lysine > D,L-threonine > L-asparagine. In low pH solution, adsorption was generally higher than that at intermediate and high pH values. Generally, as the ionic strength increases, the adsorption of the amino acids increases. (C) 2001 Society of Chemical Industry.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	Journal of Chemical Technology and Biotechnology	en
dc.identifier.doi	10.1002/1097-4660(200101)76:1<83::AID-JCTB345>3.0.CO;2-N	en
dc.identifier.isi	ISI:000166424300011	en
dc.identifier.volume	76	en
dc.identifier.issue	1	en
dc.identifier.spage	83	en
dc.identifier.epage	89	en