Abstract:The aim of this study was to determine whether, and to what extent, structures of pigment‐origin affect the susceptibility of humic acids (HAs) to oxidation, with the primary focus on derivatives of chlorophyll. The sediment samples were collected from lakes with different catchment management, and the Szczecin Lagoon, which is the estuary of the Odra River. HAs were extracted from sediments using 0.5 M NaOH solution. Sediments differed in their contents of total organic carbon (3.8–456.0 g kg−1) and total nit… Show more
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