Detail publikace

Surface and solution behavior of surfactants produced from humic acids

ČTVRTNÍČKOVÁ, A. DRASTÍK, M. DAVID, J. KUČERÍK, J.

Originální název

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

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 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 molecular weight between 50 and75 kDa.

Klíčová slova

humic acids, natural surfactants, ultrasonic resonator, size exclusion chromatography, surface tension

Autoři

ČTVRTNÍČKOVÁ, A.; DRASTÍK, M.; DAVID, J.; KUČERÍK, J.

Rok RIV

2010

Vydáno

26. 10. 2010

Nakladatel

USAYS

Místo

Konya

ISBN

978-605-389-037-9

Kniha

Water and Wastewater Management

Edice

International Sustainable Water and Wastewater Management

Číslo edice

Strany od

290

Strany do

300

Strany počet

BibTex

@inproceedings{BUT72495,
  author="Anna {Uhrová} and Martin {Drastík} and Jan {David} and Jiří {Kučerík}",
  title="Surface and solution behavior of surfactants produced from humic acids",
  booktitle="Water and Wastewater Management",
  year="2010",
  series="International Sustainable Water and Wastewater Management",
  number="1",
  pages="290--300",
  publisher="USAYS",
  address="Konya",
  isbn="978-605-389-037-9"
}