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DOSKOČIL, L. GRASSET, L. ENEV, V. KALINA, L. PEKAŘ, M.
Originální název
Study of water - extractable fractions from South Moravian lignite
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
Lignite can be applied directly in natural form on agricultural fields as a soil conditioner. However there is little information on leaching of risky compounds by its interaction with water. South Moravian lignite was therefore extracted with water at 25 C and 2.3% of water-soluble fractions were obtained from lignite corresponding to 0.3% of total organic carbon. All ten fractions form aromatic and aliphatic structures with oxygen containing functional groups such as carboxyl groups, alcohols, ethers, esters, and fractions can be characterized as fulvic-like and humic-like substances. According to the XPS spectra, the fractions contain two nitrogen forms, one of which is ascribed to pyrroles and the second is related to protonated amines or quaternary nitrogen. Analysis at molecular level showed that the fractions contain compounds such as benzene carboxylic acids and their derivatives, small aliphatic diacids, fatty acids and polyols. Most of the identified molecules reflect clearly the origin from microbial degradation.The differences between the individual fractions are negligible, especially after 21 days of extraction. From environmental points' of view, it seems that the identified compounds do not represent a toxic risk.
Klíčová slova
lignite; water - soluble fractions; fulvic acid; humic acid; organic matter
Autoři
DOSKOČIL, L.; GRASSET, L.; ENEV, V.; KALINA, L.; PEKAŘ, M.
Rok RIV
2015
Vydáno
13. 3. 2015
ISSN
1866-6280
Periodikum
ENVIRON EARTH SCI
Ročník
73
Číslo
7
Stát
Spolková republika Německo
Strany od
3873
Strany do
3885
Strany počet
13
BibTex
@article{BUT109237, author="Leoš {Doskočil} and Laurent {Grasset} and Vojtěch {Enev} and Lukáš {Kalina} and Miloslav {Pekař}", title="Study of water - extractable fractions from South Moravian lignite", journal="ENVIRON EARTH SCI", year="2015", volume="73", number="7", pages="3873--3885", doi="10.1007/s12665-014-3671-1", issn="1866-6280" }