Publication detail

Dissociation properties and behavior of active humic fractions dissolved in aqueous systems

KLUČÁKOVÁ, M.

Original Title

Dissociation properties and behavior of active humic fractions dissolved in aqueous systems

Type

journal article in Web of Science

Language

English

Original Abstract

The function of humic acids in nature is strongly affected by their solubility and their ability to dissociate. This work is focused on the fraction of humic acids which is dissolved in water or rather the aqueous phase in humic-containing systems. This fraction can be rich in acidic functional groups which are the most active ones. The amount of the dissolved humic fraction can be considered to be the result of equilibrium between dissolved and undissolved humic substances. In this study, the concentration dependence of the dissociation constants was determined and analyzed. A maximum was observed for the dependence of the degree of dissociation on the concentration. In less concentrated leachates, less soluble humic particles with weaker functional groups were able to be dissolved. The weak functional groups have lower dissociation ability and they were able to remain in non-dissociated forms. The increase of humic contents in leachates caused smaller amounts of soluble fractions with the weakest functional groups to remain in an undissolved form, which led to the increase in the degree of dissociation. The increase in concentration of humic acids in the leachates caused the degree of dissociation decrease as a result of interactions between dissolved particles.

Keywords

humic acids; solubility; dissociation; functional group

Authors

KLUČÁKOVÁ, M.

Released

23. 9. 2016

Publisher

Elsevier

ISBN

1381-5148

Periodical

REACTIVE & FUNCTIONAL POLYMERS

Year of study

109

Number

1

State

Kingdom of the Netherlands

Pages from

9

Pages to

14

Pages count

6

BibTex

@article{BUT128432,
  author="Martina {Klučáková}",
  title="Dissociation properties and behavior of active humic fractions dissolved in aqueous systems",
  journal="REACTIVE & FUNCTIONAL POLYMERS",
  year="2016",
  volume="109",
  number="1",
  pages="9--14",
  doi="10.1016/j.reactfunctpolym.2016.09.004",
  issn="1381-5148"
}