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KLUČÁKOVÁ, M. ČECHOVÁ, E. BACHRATÁ, R. PEKAŘ, M.
Originální název
BEHAVIOUR OF HUMIC ACIDS IN WATER AND AQUEOUS SOLUTIONS
Typ
kapitola v knize
Jazyk
angličtina
Originální abstrakt
Behaviour of various humic samples in water and aqueous solutions is studied in this chapter. Although humic acids are operationally defined as that fraction of humic substances, which is not soluble under acidic conditions, it does not mean that the solid preparation easily dissolves in water. Presented results suggest that dissolving of solid humic acids in water environment is more complex than conventional solubility behaviour of sparingly soluble solids. Multi-step mechanism of solid humic acids interaction with water, including partial equilibrium dissolution as well as direct equilibrium dissociation from the solid state, was proposed and proved experimentally. Only a very small part of solid humic acids can be dissolved in water and not giving necessarily saturation at the same time. Washing out experiments show that only a certain maximum of soluble fraction can exist in all used humic samples. Other experiments confirm that the dissolution of humic particles is significantly affected by the presence of carboxylic acids. The results indicate that the acids and related compounds may affect markedly the mobility and transport of humic substances in the environment. Experimental data further demonstrate that regardless the common mechanism, solubility and dissociation degree of various humic samples may be very different and can be estimated using the parameters of model based on the proposed mechanism.
Klíčová slova
humic acid, dissociation, solubility, polyelectrolytes
Autoři
KLUČÁKOVÁ, M.; ČECHOVÁ, E.; BACHRATÁ, R.; PEKAŘ, M.
Rok RIV
2010
Vydáno
18. 11. 2010
Nakladatel
Nova Science Publishers, Inc.
Místo
New York
ISBN
978-1-60741-761-3
Kniha
Solid Waste Management and Environmental Remediation
Edice
Environmental Remediation: Regulatory Requirements, Site Assessment and Health Effects
Číslo edice
1
Strany od
453
Strany do
465
Strany počet
12
BibTex
@inbook{BUT55931, author="KLUČÁKOVÁ, M. and ČECHOVÁ, E. and BACHRATÁ, R. and PEKAŘ, M.", title="BEHAVIOUR OF HUMIC ACIDS IN WATER AND AQUEOUS SOLUTIONS", booktitle="Solid Waste Management and Environmental Remediation", year="2010", publisher="Nova Science Publishers, Inc.", address="New York", series="Environmental Remediation: Regulatory Requirements, Site Assessment and Health Effects", edition="1", pages="453--465", isbn="978-1-60741-761-3" }