Abstract
According to the traditional view of humification, there are two different pathways by which HS can form (Anonymous 2001; Hatcher and Spiker 1988). In the degradative pathway formed macromolecules are partially degraded to HS. Most macromolecules are plant biopolymers, such as lignin or cellulose. Humins are partly modified plant biopolymers. The other metabolic pathway comprises condensation polymerization reactions with three different models for abiotic condensation processes: the polyphenol model, the melanoidin model, and the polyunsaturated structure model.
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© 2003 Springer-Verlag Berlin Heidelberg
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Steinberg, C.E.W. (2003). Origin of Humic Substances in Freshwater: Biogeochemical Pathways. In: Ecology of Humic Substances in Freshwaters. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-06815-1_2
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DOI: https://doi.org/10.1007/978-3-662-06815-1_2
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-07873-6
Online ISBN: 978-3-662-06815-1
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