About: Surface and Solution Behavior of Surfactants Produced from Lignite Humic Acids

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Analytical and physical-chemical techniques, such as elemental analysis, FTIR, surface tension (ST) measurement, high performance size exclusion chromatography (HPSEC) and high resolution ultrasonic spectroscopy (HRUS) were combined in order to assess the surface activity of lignite sodium humic acids salts (humates). Humates were obtained from parental and modified South Moravian lignite pretreated either by oxidation or by small organic acids. It was shown that unlike common surfactants, humates dissolved in water do not exhibit the critical micelle concentration and form micelle-like aggregates also in diluted solutions. As revealed by HRUS, the aggregation and/or reconformation of humic aggregates in solution takes up to ten minutes; in contrast, the ST measurements showed long-term stabilization associated with a slow decrease in ST of the solution. Correlation with results of HPSEC indicated that the surface activity of lignite humates is caused predominantly by aggregates with apparent molecula Analytical and physical-chemical techniques, such as elemental analysis, FTIR, surface tension (ST) measurement, high performance size exclusion chromatography (HPSEC) and high resolution ultrasonic spectroscopy (HRUS) were combined in order to assess the surface activity of lignite sodium humic acids salts (humates). Humates were obtained from parental and modified South Moravian lignite pretreated either by oxidation or by small organic acids. It was shown that unlike common surfactants, humates dissolved in water do not exhibit the critical micelle concentration and form micelle-like aggregates also in diluted solutions. As revealed by HRUS, the aggregation and/or reconformation of humic aggregates in solution takes up to ten minutes; in contrast, the ST measurements showed long-term stabilization associated with a slow decrease in ST of the solution. Correlation with results of HPSEC indicated that the surface activity of lignite humates is caused predominantly by aggregates with apparent molecula (en)
Title	Surface and Solution Behavior of Surfactants Produced from Lignite Humic Acids Surface and Solution Behavior of Surfactants Produced from Lignite Humic Acids (en)
skos:prefLabel	Surface and Solution Behavior of Surfactants Produced from Lignite Humic Acids Surface and Solution Behavior of Surfactants Produced from Lignite Humic Acids (en)
skos:notation	RIV/00216305:26310/11:PU92956!RIV12-MSM-26310___
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM0021630501)
http://linked.open...iv/cisloPeriodika	7a
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Čtvrtníčková, Anna Kučerík, Jiří David, Jan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoké učení technické v Brně / Fakulta chemická
http://linked.open...dnocenehoVysledku	233480
http://linked.open...ai/riv/idVysledku	RIV/00216305:26310/11:PU92956
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Lignite humic acids, natural surfactants, ultrasonic resonator, size exclusion chromatography, surface tension (en)
http://linked.open.../riv/klicoveSlovo	size exclusion chromatography Lignite humic acids natural surfactants ultrasonic resonator surface tension
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[B070F8F1CB53]
http://linked.open...i/riv/nazevZdroje	Fresenius Environmental Bulletin
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	20
http://linked.open...iv/tvurceVysledku	Kučerík, Jiří Čtvrtníčková, Anna David, Jan Drastík, Martin
http://linked.open...ain/vavai/riv/wos	000292627300006
http://linked.open...n/vavai/riv/zamer	Multifunkční heterogenní materiály na bázi syntetických polymerů a biopolymerů
issn	1018-4619
number of pages	7 (xsd:int)
http://localhost/t...ganizacniJednotka	26310

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