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  • The potential of high resolution ultrasonic analysis (HRUS) in humic acid colloidal properties research has been demonstrated. Sodium salts of humic acids from soil and lignite showed similar behaviour, supporting the hypothesis that, at both neutral and alkaline pH, they aggregate from very low concentration. The same conclusion can be reached for solutions at high ionic strength. We tried to apply the same procedure as used for the study of micellization and determination of critical micelle concentration of common surfactants. As expected, our experiments did not show the same break as demonstrated on the HRUS records for sodium dodecyl sulfate, at least in the range of measured concentration (i.e. from 0.001 up to 10 g/L). The colloidal state of humic acids in aqueous solution is very sensitive to the presence of other, both charged and neutral, molecules. Aggregation of humic acids can be disturbed or promoted, depending on the concentration, by electrostatic or other weak interactions with extra
  • The potential of high resolution ultrasonic analysis (HRUS) in humic acid colloidal properties research has been demonstrated. Sodium salts of humic acids from soil and lignite showed similar behaviour, supporting the hypothesis that, at both neutral and alkaline pH, they aggregate from very low concentration. The same conclusion can be reached for solutions at high ionic strength. We tried to apply the same procedure as used for the study of micellization and determination of critical micelle concentration of common surfactants. As expected, our experiments did not show the same break as demonstrated on the HRUS records for sodium dodecyl sulfate, at least in the range of measured concentration (i.e. from 0.001 up to 10 g/L). The colloidal state of humic acids in aqueous solution is very sensitive to the presence of other, both charged and neutral, molecules. Aggregation of humic acids can be disturbed or promoted, depending on the concentration, by electrostatic or other weak interactions with extra (en)
  • Nový pohled na agregační chování huminových kyselin: aplikace vysoce rozslišovací ultrazvukové spektroskopie (cs)
Title
  • New insights into aggregation and conformational behaviour of humic substances: Application of high resolution ultrasonic spectroscopy
  • New insights into aggregation and conformational behaviour of humic substances: Application of high resolution ultrasonic spectroscopy (en)
  • Nový pohled na agregační chování huminových kyselin: aplikace vysoce rozslišovací ultrazvukové spektroskopie (cs)
skos:prefLabel
  • New insights into aggregation and conformational behaviour of humic substances: Application of high resolution ultrasonic spectroscopy
  • New insights into aggregation and conformational behaviour of humic substances: Application of high resolution ultrasonic spectroscopy (en)
  • Nový pohled na agregační chování huminových kyselin: aplikace vysoce rozslišovací ultrazvukové spektroskopie (cs)
skos:notation
  • RIV/00216305:26310/07:PU70240!RIV08-MSM-26310___
http://linked.open.../vavai/riv/strany
  • 2098-2110
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(MSM0021630501)
http://linked.open...iv/cisloPeriodika
  • 1
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 437146
http://linked.open...ai/riv/idVysledku
  • RIV/00216305:26310/07:PU70240
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • humic substances, aggregation, high resolution ultrasonic spectroscopy (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [AC118E316A19]
http://linked.open...i/riv/nazevZdroje
  • ORGANIC GEOCHEMISTRY
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 38
http://linked.open...iv/tvurceVysledku
  • Kučerík, Jiří
  • Pekař, Miloslav
  • Šmejkalová, Daniela
  • Čechlovská, Hana
http://linked.open...n/vavai/riv/zamer
issn
  • 0146-6380
number of pages
http://localhost/t...ganizacniJednotka
  • 26310
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