Humic acids from oxidized coals I. Elemental composition, titration curves, heavy metals in HA samples, nuclear magnetic resonance spectra of HAs and infrared spectroscopy
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F04%3A00010171" target="_blank" >RIV/61989100:27360/04:00010171 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Humic acids from oxidized coals I. Elemental composition, titration curves, heavy metals in HA samples, nuclear magnetic resonance spectra of HAs and infrared spectroscopy
Original language description
The formation of humic acids (HAs) from bituminous coal was verified by laboratory oxidation. In a relatively short time the oxidation by air at temperature above 150 °C led to the formation of HAs. These HAs were compared with those isolated from oxidized bituminous coal from the vicinity of red bed bodies, from weathered bituminous coal, oxihumolite and lignite. For this the organic and inorganic elemental composition of HAs, apparent dissociation constants, metal-binding capacities, nuclear magneticresonance and infrared spectra were determined and evaluated. With increasing temperature of laboratory oxidation of bituminous coal the percentage of aromaticity of HAs increases. HAs prepared from coal oxidized at 150 °C are characterized by an aromaticity index 78% while for HAs prepared at 250 and 300 °C by 95% aromaticity. The same index for HAs isolated from naturally oxidized bituminous coals is of about 87% whereas it is of about 50% for oxihumolite and lignite. The apparent diss
Czech name
Huminové kyseliny z oxidovaných uhlí, I. Prvkové složení titrační křivky, těžké kovy v HA vzorcích, NMR spektra huminových kyselin a infračervené spektrometrie
Czech description
Huminové kyseliny z oxidovaných uhlí, I. Prvkové složení titrační křivky, těžké kovy v HA vzorcích, NMR spektra huminových kyselin a infračervené spektrometrie
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA105%2F02%2F0163" target="_blank" >GA105/02/0163: The study of higher ash lignite composition on affinity and volatility of toxic elements and substances for energetic utilization</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2004
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Chemosphere
ISSN
0045-6535
e-ISSN
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Volume of the periodical
Neuveden
Issue of the periodical within the volume
54
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
9
Pages from-to
1237-1245
UT code for WoS article
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EID of the result in the Scopus database
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