Detail publikace

Ultrasonic Spectroscopy and Fractal Analysis in the Study on Progressive Aggregation of Humic Substances in Diluted Solutions - new

KUČERÍK, J. DRASTÍK, M. ZMEŠKAL, O. ČTVRTNÍČKOVÁ, A.

Originální název

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

High resolution ultrasonic spectroscopy was used to study progressive aggregation and structural changes in diluted aquatic solutions of humic substances over the concentration range from 0.001 g/L to 3 g/L. For this purpose, both sodium salts (fulvates) and protonized forms of fulvic acids and sodium salts of humic acids (humates) were used; the origin of humic substances covered wide range of sources. Obtained results confirmed previously published statement about the progressive aggregation of humic substances in diluted solutions. The method allowing the treatment of obtained data by fractal analysis was developed and tested. Determined dependency of fractal dimension on concentration revealed clear differences in mechanisms of aggregation of individual humic and fulvic samples. In fact the value of fractal dimension 2.5 was determined for the concentration 3g/L; diluting the solution caused increasing in fractal dimension value up to 3 for concentrations around 0.01 g/L. The increase was not the same for all samples, in fact the most significant fluctuation in this concentration range was observed for fulvic acids. It was found out that despite the prevalence of hydrophobic forces in stabilization of humic substances in diluted solutions, also the nature of the counterion represents one of the crucial factors playing role in conformation and stability of humates and fulvates. In accordance with previous observations based on the measurement of lignite humates, also humates, fulvates and fulvic acids originating from various sources showed the change in their aggregates properties around the concentration 1 g/L.

Klíčová slova

Humic and fulvic acids, aggregation, IHSS, ultrasonic spectroscopy, fractal analysis

Autoři

KUČERÍK, J.; DRASTÍK, M.; ZMEŠKAL, O.; ČTVRTNÍČKOVÁ, A.

Vydáno

31. 12. 2009

ISSN

1790-5079

Periodikum

WSEAS Journal Transactions on Environment and Development

Ročník

Číslo

Stát

Italská republika

Strany od

705

Strany do

715

Strany počet

BibTex

@article{BUT43411,
  author="Jiří {Kučerík} and Martin {Drastík} and Oldřich {Zmeškal} and Anna {Uhrová}",
  title="Ultrasonic Spectroscopy and Fractal Analysis in the Study on Progressive Aggregation of Humic Substances in Diluted Solutions - new",
  journal="WSEAS Journal Transactions on Environment and Development",
  year="2009",
  volume="5",
  number="11",
  pages="705--715",
  issn="1790-5079"
}