Surface and Solution Behavior of Surfactants Produced from Lignite Humic Acids

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F11%3APU92956" target="_blank" >RIV/00216305:26310/11:PU92956 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Surface and Solution Behavior of Surfactants Produced from Lignite Humic Acids

Original language 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 a

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2011

Confidentiality

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

Name of the periodical

Fresenius Environmental Bulletin

ISSN

1018-4619

e-ISSN

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Volume of the periodical

20

Issue of the periodical within the volume

7

Country of publishing house

DE - GERMANY

Number of pages

7

Pages from-to

1764-1771

UT code for WoS article

000292627300006

EID of the result in the Scopus database

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