Study of interaction of DOC with aluminium and hydrogen ion in soil- and surface water using a simple equilibrium model

Taugbøl, Geir; Seip, H. M.

doi:10.1016/0160-4120(94)90120-1

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…These rather small DNOM molecules had a very poor ability to sorb PAH (e. g., K B[a]P , Table 2). Other studies have shown that the Al complexation ability of this relatively aliphatic DNOM from Birkenes is much lower than that of Svartberget (Østerhus, 2001) and Skjervatjern (Taugbøl and Seip, 1994).…”

Section: Birkenes Dnommentioning

confidence: 99%

Key site variables governing the functional characteristics of Dissolved Natural Organic Matter (DNOM) in Nordic forested catchments

Vogt

Akkanen

Andersen

et al. 2004

Aquatic Sciences - Research Across Boundaries

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The objective of this study was to extract and evaluate key catchment characteristics explaining the main variation in properties of dissolved natural organic matter (DNOM) in surface waters draining each catchment. A number of classical and sophisticated DNOM characterisation methodologies were used for this purpose. The explanatory capability of site characteristics on the variation in descriptors of DNOM, including elemental analysis (EA), DOC fractionation, SEC, CZE, CGE, UV/Vis-and FTIR spectra, FES, TLS, ESR, ESI/MS, 13 C-CPMAS-NMR, potentiometric pH titration as well as functional characteristics such as biodegradability, and the response of macrophyte and PAH partitioning coefficients were evaluated. The sampling sites were all natural, coniferous, heathery-forested catchments with bogs, forming a climatic, anthropogenic deposition and proportional biotope cover gradient.Correlations to the main principal components, as well as a correlation matrix, singled out total S-deposiAquatic Sciences tion as the key explanatory site parameter, accounting for most of the variation in DNOM descriptors. Other significant factors were H + concentration, length of growing season, biotope coverage (i. e., peatland/ or lake/watershed ratio), site elevation and TOC concentration. Total sulphur (S) deposition was strongly negatively correlated to the molecular weight, aromaticity, carboxylic acidity and sorption capacity of PAH. A greater proportion of lake and Histosol biotopes of the sampling sites were reflected in a greater aliphatic character of the DNOM. PCA clustering of samples from the same site in spring and fall showed a basic site-specific DNOM quality and a weak season effect. The Hasse diagram technique (a method of partial order theory) was used to show, for instance, how the relative Histosol coverage may determine NOM quality and, in turn, how this coincides with high macrophyte response.

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Section: Birkenes Dnommentioning

confidence: 99%