Characterization and fractionation of humic acids extracted from South-Moravia lignite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F03%3APU37656" target="_blank" >RIV/00216305:26310/03:PU37656 - 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

Characterization and fractionation of humic acids extracted from South-Moravia lignite

Popis výsledku v původním jazyce

Lignite is known as a material from which relatively large quantity of humic acids (HA) can be extracted. Since HA are heterogeneous mixtures of substances, the exact determination of their structure is very controversial. HA vary in composition depending on their source, location and method of extraction. In this work, the general characterization of HA isolated from South-Moravia lignite and some fractions extracted thereof with buffer solutions is reported. Two ways of fractionation were used: 1) HAAwere mixed with buffer at the lowest pH value, then the insoluble residue was separated by filtration and (partially) dissolved in buffer with higher pH value. 2) The original isolated HA were individually dissolved in each buffer solution. It was confirmed, that in both cases the solubility of HA increases with pH value. The dependence of dissolved amount on pH can be characterized approximately by exponential function. HA and obtained fractions were analyzed by FT-IR and UV/VIS spectr

Název v anglickém jazyce

Characterization and fractionation of humic acids extracted from South-Moravia lignite

Popis výsledku anglicky

Lignite is known as a material from which relatively large quantity of humic acids (HA) can be extracted. Since HA are heterogeneous mixtures of substances, the exact determination of their structure is very controversial. HA vary in composition depending on their source, location and method of extraction. In this work, the general characterization of HA isolated from South-Moravia lignite and some fractions extracted thereof with buffer solutions is reported. Two ways of fractionation were used: 1) HAAwere mixed with buffer at the lowest pH value, then the insoluble residue was separated by filtration and (partially) dissolved in buffer with higher pH value. 2) The original isolated HA were individually dissolved in each buffer solution. It was confirmed, that in both cases the solubility of HA increases with pH value. The dependence of dissolved amount on pH can be characterized approximately by exponential function. HA and obtained fractions were analyzed by FT-IR and UV/VIS spectr

Druh

D - Stať ve sborníku

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GP104%2F02%2FD036" target="_blank" >GP104/02/D036: Komplexotvorné procesy v systémech s charakteristickým obsahem huminových látek</a><br>

Návaznosti

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

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. Humic Substances in Ecosystems 5

ISBN

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ISSN

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e-ISSN

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Počet stran výsledku

1

Strana od-do

18-18

Název nakladatele

University of Technology and Agriculture, Bydgoszcz, Poland

Místo vydání

Bydgoszcz

Místo konání akce

Duszniki Zdroj

Datum konání akce

25. 8. 2003

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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