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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

  • DOI - Digital Object Identifier

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

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

  • 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

  • EID of the result in the Scopus database