Sorption of Neutral Compounds to Dissolved Organic Matter DOM

The Kioc values for sorption of a given compound to DOM, which we will denote as KiDOC, will depend on the fraction of the DOM which is large enough to act as a sorbent (related to the molecular weight distribution of the DOM), as well as on the organic matter s chemical structure (e.g., degree of aromaticity and presence of polar functionalities). 

Determination of Kamc Values and Availability of Experimental Data 

To date, the majority of studies on the sorption of organic compounds to DOM have been conducted with PAHs. Therefore, in contrast to the situation found for soil, 

Sorption I Sorption Processes Involving Organic Matter 

For now, we focus on bulk DOM parameters. Using pyrene as a common sorbate, 17 different DOMs were tested for their ability to sorb this PAH at 25°C. Correlations of the resultant KlD0C values with the bulk properties of the DOMs were then sought (Chin et al., 1997 Georgi, 1998). For pyrene sorption, the molar absorptivities at 280 nm (reflecting aromaticity) and the O/C ratio (reflecting overall polarity) were found to yield a significant correlation (Fig. 9.14)  

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Sorption of Neutral Compounds to Dissolved Organic Matter (DOM)... 

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