Sorption to natural solid is an underlying process affecting the transport, degradation, and biological activity of organic pollutants in the environment. Desorption of many organic pollutants from natural sediments has been observed to be biphasic, containing reversible and irreversible compartments. A fraction of the adsorbed contaminants desorbs reversibly, as expected, but there exists a second and distinct fraction that is resistant to desorption. Irreversible sorption of organic pollutants ...