Article (Scientific journals)
Comprehensive comparison of the chemical and structural characterization of landfill leachate and leonardite humic fractions
Tahiri, Abdelghani; Richel, Aurore; Destain, Jacqueline et al.
2016In Analytical and Bioanalytical Chemistry, 408 (7), p. 1917-1928
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Keywords :
Humic substances; Landfill leachates; Leonardite; HPLC; UV–vis; FTIR; NMR; MALDI-TOF
Abstract :
[en] Humic substances (HS) are complex and heterogeneous mixtures of organic compounds that occur everywhere in the environment. They represent most of the dissolved organic matter in soils, sediments (fossil), water, and landfills. The exact structure of HS macromolecules has not yet been determined because of their complexity and heterogeneity. Various descriptions of HS are used depending on specific environments of origin and research interests. In order to improve the understanding of the structure of HS extracted from landfill leachate (LHS) and commercial HS from leonardite (HHS), this study sought to compare the composition and characterization of the structure of LHS and HHS using elemental composition, chromatographic (high-performance liquid chromatography (HPLC)), and spectroscopic techniques (UV–vis, FTIR, NMR, and MALDI-TOF). The results showed that LHS molecules have a lower molecular weight and less aromatic structure than HHS molecules. The characteristics of functional groups of both LHS and HHS, however, were basically similar, but there was some differences in absorbance intensity. There were also less aliphatic and acidic functional groups and more aromatic and polyphenolic compounds in the humic acid (HA) fraction than in the fulvic acid (FA) and other molecules (OM) fractions of both origins. The differences between LHS and HHS might be due to the time course of humification. Combining the results obtained from these analytical techniques cold improve our understanding of the structure of HS of different origins and thus enhance their potential use.
Disciplines :
Agriculture & agronomy
Environmental sciences & ecology
Chemistry
Author, co-author :
Tahiri, Abdelghani ;  Université de Liège - ULiège > Doct. sc. agro. & ingé. biol.
Richel, Aurore  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie biologique industrielle
Destain, Jacqueline ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries
Druart, Philippe;  Centre wallon de recherches agronomiques (CRA-W) > Sciences du vivant > Génie biologique
Thonart, Philippe ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries
Ongena, Marc ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Bio-industries
Language :
English
Title :
Comprehensive comparison of the chemical and structural characterization of landfill leachate and leonardite humic fractions
Publication date :
04 January 2016
Journal title :
Analytical and Bioanalytical Chemistry
ISSN :
1618-2642
eISSN :
1618-2650
Publisher :
Springer Science & Business Media B.V., Berlin, Germany
Volume :
408
Issue :
7
Pages :
1917-1928
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 13 February 2016

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