Solubility and Dissociation of Lignitic Humic Acids in Water Suspensions
Result description
Behavior of humic acids extracted from lignite in water suspension was studied by means of potentiometry. Although humic acids are operationally defined as that fraction of humic substances, which is not soluble under acidic conditions, it does not meanthat 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 humicacids interaction with water, including partial equilibrium dissolution as well as direct equilibrium dissociation from the solid state, was proposed and proved experimentally. Only very small part of solid humic acids can be dissolved in water and not giving necessarily saturation at the same time. In contrast to common sparingly soluble solids, solid humic phase thus possesses non-constant chemical potential even under constant temperature and pressure and its activity does not equal t
Keywords
humic acidlignitedissociation equilibriumsolubilitypolyelectrolytessuspensions
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Solubility and Dissociation of Lignitic Humic Acids in Water Suspensions
Original language description
Behavior of humic acids extracted from lignite in water suspension was studied by means of potentiometry. Although humic acids are operationally defined as that fraction of humic substances, which is not soluble under acidic conditions, it does not meanthat 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 humicacids interaction with water, including partial equilibrium dissolution as well as direct equilibrium dissociation from the solid state, was proposed and proved experimentally. Only very small part of solid humic acids can be dissolved in water and not giving necessarily saturation at the same time. In contrast to common sparingly soluble solids, solid humic phase thus possesses non-constant chemical potential even under constant temperature and pressure and its activity does not equal t
Czech name
Rozpustnost a disociace
Czech description
Rozpustnost a disociace
Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
Project
GP104/02/D036: Complexation processes in system with characteristic content of humic substances
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN
0927-7757
e-ISSN
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Volume of the periodical
252
Issue of the periodical within the volume
2-3
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
8
Pages from-to
157-164
UT code for WoS article
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EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
CF - Physical chemistry and theoretical chemistry
Year of implementation
2005