Abstract
In the last decades, structural complexity of humic substances and their role in natural environments have been widely discussed. Their persistence and/or susceptibility to biological decomposition, however, requires for further research. Here we present a contribution dealing in part with humic acids (HA) extracted by alkali from soils differing in metal contents, and which might represent naturally occurring organic-mineral-metal complexes. If exposed to microbial activities, and especially if easily utilizable carbon and nitrogen sources were not available, HA from soils containing elevate metal contents or from a soil site located near to a Mg-plant and heavily contaminated with this element, were found to support growth of soil microorganisms. At the same time, the structure of HA underwent several structural transformations. The FT-IR spectroscopic investigations indicated releases of metal and silicate constituents from the HA preparations.
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Filip, Z., Demnerova, K. (2009). Humic Substances as Natural Interacting Agents: Their Characteristics and Possible Fate in Environment. In: Simeonov, L.I., Hassanien, M.A. (eds) Exposure and Risk Assessment of Chemical Pollution — Contemporary Methodology. NATO Science for Peace and Security Series C: Environmental Security. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-2335-3_17
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DOI: https://doi.org/10.1007/978-90-481-2335-3_17
Publisher Name: Springer, Dordrecht
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