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Received October 30, 2012
Accepted July 17, 2013
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Desorption kinetics of polycyclic aromatic hydrocarbons in soil using lab-scale rotary desorber
Department of Environmental Engineering, Pusan National University, Busan 609-735, Korea 1Environmental Remediation Project Office, Korea Rural Community & Agricuture Corporation, Bongilcheon-ri, Jori-eup, Paju-si, Gyeonggi-do 413-823, Korea 2Faculty of Health Science, Daegu Haany University, Gyeongsan 712-715, Korea
kjoh@pusan.ac.kr
Korean Journal of Chemical Engineering, October 2013, 30(10), 1896-1903(8), 10.1007/s11814-013-0129-1
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Abstract
Thermal desorption of fluorene, anthracene, pyrene, and benzo(a)pyrene in soil contaminated with PAHs was performed using a rotary desorber at temperatures of 300-500 ℃, and the dependency of the PAH removal efficiency on the percentage water content, residence time, and thermal desorption temperature was investigated. The removal efficiencies were inversely proportional to the boiling points of PAHs, and the removal efficiencies decreased with decreasing_x000D_
residence time and heating temperature. The reaction rate constant and activation energies (EA) were estimated to determine the thermal desorption properties of each substance, and the activation energies were found to be 29.50-34.48 kJ mol^(-1). Freeman-Carroll’s law was applied along with the Arrhenius equation to extract the thermal desorption properties from the data obtained in this experiment.
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