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1482496 
Journal Article 
Adsorption/desorption hysteresis in organic pollutant and soil/sediment interaction 
Kan, AT; Fu, G; Tomson, MB 
1994 
1 
Environmental Science & Technology
ISSN: 0013-936X
EISSN: 1520-5851 
28 
5 
859-867 
English 
22191827 
WOS:A1994NJ32400021 
BIOSIS COPYRIGHT: BIOL ABS. Adsorption and desorption of pollutants to soil and sediment materials are major fate mechanisms. The hypothesis that adsorption and desorption are reversible processes has been tested. The organic pollutants naphthalene, phenanthrene, and p-dichlorobenzene have been studied in the laboratory using batch reactors at room temperature from a few hours to over 2 months. The adsorption experiments were at equilibrium within 1-4 days and could be modeled using simple linear isotherms with Kp values consistent with published Koc and Kow relationships. Desorption experiments were conducted with the contaminated sediments by successive dilutions. Desorption experiments varied from 1 day to 5 months, and observed desorption rates were from 1 to 3 orders of magnitude smaller than previously measured or predicted. If equilibrium were obtained during the desorption, typically over 82-99% of the adsorbed pollutant would have been desorbed, but generally only 30-50 % of the adsorbed 
Ecology; Biochemical Studies-General; Toxicology-Environmental and Industrial Toxicology; Public Health: Environmental Health-Air; Soil Science-Physics and Chemistry (1970- )