Huminové kyseliny z oxidovaných uhlí, I. Prvkové složení titrační křivky, těžké kovy v HA vzorcích, NMR spektra huminových kyselin a infračervené spektrometrie

Kód výsledku v 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>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Humic acids from oxidized coals I. Elemental composition, titration curves, heavy metals in HA samples, nuclear magnetic resonance spectra of HAs and infrared spectroscopy

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

Humic acids from oxidized coals I. Elemental composition, titration curves, heavy metals in HA samples, nuclear magnetic resonance spectra of HAs and infrared spectroscopy

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

<a href="/cs/project/GA105%2F02%2F0163" target="_blank" >GA105/02/0163: Studium složení výše-popelnatého hnědého uhlí na afinitu a těkavost toxických prvků a látek pro energetické použití</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemosphere

ISSN

0045-6535

e-ISSN

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Svazek periodika

Neuveden

Číslo periodika v rámci svazku

54

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

1237-1245

Kód UT WoS článku

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EID výsledku v databázi Scopus

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