Preface: humic substances in the environment
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TLDR
The fate of natural organic matter, and especially humic substances (HSs), has attracted increasing interest of scientists representing various disciplines over recent decades as discussed by the authors, and the most efficient of these separation procedures implies an extraction with alkali which operatively identifies three HSs fractions, based on their water solubility; they are:Abstract:
The fate of natural organic matter, and especially humic substances (HSs), has attracted increasing interests of scientists representing various disciplines over recent decades. Among the various organic substances occurring naturally, HSs are the most widespread, being present in soil, water, lake sediments, peat, brown coal, and shales. HSs represent about 25% of the total organic carbon on the earth. These substances represent a class of naturally occurring complex molecular structures, formed by aggregation and assemblage processes through which biomolecules originating from plant and animal residues are progressively transformed via biotic and abiotic pathways. The research of HSs is complex because these organic compounds are bound by, or associated with, soil mineral fractions, and require physical and/or chemical separation from the inorganic components through an extraction procedure, prior to their physico-chemical analysis. The most efficient of these separation procedures implies an extraction with alkali which operatively identifies three HSs fractions, based on their water solubility; they are:read more
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Chemical Structure and Biological Activity of Humic Substances Define Their Role as Plant Growth Promoters
TL;DR: A detailed survey of the mechanisms associated to the growth regulatory functions of HS in view of their use in sustainable technologies can be found in this paper, where the authors highlight the existence of key functional groups in HS that might trigger positive local and systemic physiological responses via a complex network of hormone-like signaling pathways.
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How relationships between soil organic matter parameters and soil structure characteristics are affected by the long-term fertilization of a sandy soil
TL;DR: In this article, the impact of the long-term application of mineral fertilizers and manure on the SOM and soil structure of a sandy soil is quantified, and the relationships between the organic matter (SOM) and the soil structure with a dependence on the length of fertilizer application are determined.
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Are humic substances soil microbial residues or unique synthesized compounds? A perspective on their distinctiveness
TL;DR: In this paper, the authors argue that the traditional humic paradigm is still relevant and reveal the distinctiveness of soil humic compounds and explain why these compounds hold this distinctiveness.
Journal ArticleDOI
Lignocellulose biomass bioconversion during composting: Mechanism of action of lignocellulase, pretreatment methods and future perspectives.
Fang Chen,Di Wu,Zimin Wei,Taha Ahmed Mohamed,Guangren Zheng,Fengting Qu,Feng Wang,Yue Zhao,Caihong Song +8 more
TL;DR: In this paper, a review summarizes the pretreatment methods suitable for composting, including microbial consortium pretreatment, Fenton pretreatment and surfactant-assisted pretreatment for improving the bioconversion process of lignocellulose.
Journal ArticleDOI
Lignocellulose biomass bioconversion during composting: Mechanism of action of lignocellulase, pretreatment methods and future perspectives
TL;DR: In this article , a review summarizes the pretreatment methods suitable for composting, including microbial consortium pretreatment, Fenton pretreatment and surfactant-assisted pretreatment for improving the bioconversion process of lignocellulose.
References
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Johannes Lehmann,Markus Kleber +1 more
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Journal ArticleDOI
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Irmina Ćwieląg-Piasecka,Agnieszka Medyńska-Juraszek,Maria Jerzykiewicz,Magdalena Dębicka,Jakub Bekier,Elżbieta Jamroz,Dorota Kawałko +6 more
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