Surface and solution behavior of surfactants produced from humic acids

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F10%3APU92959" target="_blank" >RIV/00216305:26310/10:PU92959 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Surface and solution behavior of surfactants produced from humic acids

Popis výsledku v původním jazyce

Several methods, such as elemental analysis (EA), 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 sodium humic acids salts (humates). Humates were extracted from parental and modified South Moravian lignite which were 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 measurementsshowed 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 molecular w

Název v anglickém jazyce

Surface and solution behavior of surfactants produced from humic acids

Popis výsledku anglicky

Several methods, such as elemental analysis (EA), 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 sodium humic acids salts (humates). Humates were extracted from parental and modified South Moravian lignite which were 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 measurementsshowed 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 molecular w

Druh

D - Stať ve sborníku

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Water and Wastewater Management

ISBN

978-605-389-037-9

ISSN

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e-ISSN

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Počet stran výsledku

11

Strana od-do

290-300

Název nakladatele

USAYS

Místo vydání

Konya

Místo konání akce

Konya

Datum konání akce

26. 10. 2010

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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