Impacts of Heterogeneous Organic Matter on Phenanthrene Sorption:  Different Soil and Sediment Samples

Abstract

Organic petrography has been proposed as a tool for characterizing the heterogeneous organic matter present in soil and sediment samples. A new simplified method is proposed as a quantitative means of interpreting observed sorption behavior for phenanthrene and different soils and sediments based on their organic petrographical characterization. This method is tested under singe solute conditions and at phenanthrene concentration of 1 microg/L. Since the opaque organic matter fraction dominates the sorption process, we propose that by quantifying this fraction one can interpret organic content normalized sorption distribution coefficient (Koc) values for a sample. While this method was developed and tested for various samples within the same aquifer, in the current study the method is validated for soil and sediment samples from different sites that cover a wide range of organic matter origin, age, and organic content. All 10 soil and sediment samples studied had log Koc values for the opaque particles between 5.6 and 6.8. This range of Koc values illustrates the heterogeneity of opaque particles between sites and geological formations and thus the need to characterize the opaque fraction of materials on a site-by-site basis.

Impacts of compound properties and sediment characteristics on the sorption behaviour of pharmaceuticals in aquatic systems

“…Variability in pharmaceuticals sorption behaviour is likely due to several factors including total organic content, sediment texture, pH, salinity, the duration of incubation, particle size, degree of sedimentwater interactions or the heterigenicity of the organic carbon in the sediments [25,26,43,[51][52][53][54]68]. …”

Evaluation of peat and lignite phenanthrene sorption properties in relation to coal petrography: The impact of inertinite

“…In this approach, K oc , which is the organic carbon normalized sorption coefficient and reflects the affinity of the organic carbon of the sorbent for the pollutant to be adsorbed, is calculated at a given chemical concentration (Kleineidam et al, 1999;Karapanagioti et al, , 2001 as:…”

“…Inertinite has been identified as the maceral group most responsible for high sorption capacity and sorption non-linearity Karapanagioti et al, 2001Karapanagioti et al, , 2004. However, most sorption studies were conducted with sedimentary organic matter (e.g.…”

Impact of urbanization on the concentrations and distribution of organic contaminants in boreal lake sediments

“…Therefore, knowledge of the content and distribution of pollutants in stormwater trap sediments is valuable when studying lake sedimentary contamination. The sorption of hydrophobic organic contaminants to sediments is also governed by the presence of different forms of natural organic matter (Karapanagioti et al 2001;Koelmans et al 2006), which should be taken into account when examining the distribution of pollutants.…”