PMID: 16999113Sep 27, 2006

Sorption equilibrium of a wide spectrum of organic vapors in Leonardite humic acid: modeling of experimental data

Environmental Science & Technology
Christian NiedererRené P Schwarzenbach

Abstract

In a recent publication we presented experimental Leonardite humic acid/air partition coefficients for 188 polar and nonpolar organic compounds measured with one consistent method. In this paper these experimental data are evaluated with various model predictions. For the PcKocWIN model some major shortcomings become apparent. The octanol-based Karickhoff-model exhibits a good performance for the nonpolar compounds but not for the polar ones. A good description of the whole data set is achieved with a polyparameter linear free energy relationship (pp-LFER) that explicitly accounts for the nonpolar (van der Waals and cavity formation) and polar (electron donor/acceptor) interactions between the sorbate molecule and the sorbent phase. With this pp-LFER model, most of the humic acid/air partition coefficients could be predicted within a factor of 2. The pp-LFER model also successfully predicts organic-C/water partition coefficients (K(ioc)) collected from the literature when it is combined with a pp-LFER for air/water partition coefficients. This supports our earlier conclusion that the thermodynamic cycle is applicable in the humic acid/water/air system. Based on our experimental data, we present a pp-LFER-model for humic acid/ai...Continue Reading

References

Oct 17, 2008·Environmental Science and Pollution Research International·Bo PanBaoshan Xing
Nov 1, 2011·Environmental Science & Technology·Frank-Dieter KopinkeAnett Georgi
Jan 10, 2012·Journal of Agricultural and Food Chemistry·Marcella L CardBushra Khan
Dec 11, 2007·Chemosphere·Christian Niederer, Kai-Uwe Goss
Jan 29, 2008·Water Research·Torsten Meyer, Frank Wania
Oct 4, 2011·The Science of the Total Environment·Erick NfonIan T Cousins
Jun 27, 2009·Journal of Environmental Monitoring : JEM·Sanka N Atapattu, Colin F Poole
Jan 11, 2018·Environmental Science. Processes & Impacts·Antonio Di GuardoMartin Scheringer
Oct 13, 2020·European Journal of Soil Science·Drazen PetrovChris Oostenbrink

Related Concepts

Thermodynamics
Organic Chemicals
Gastroschisis
Adsorption
Body Cavities
Dental Caries
Vapor
Sternal Cleft
Octanols
Sorbate

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