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Adsorption of trichloroethylene and relevant influencing factors in loam and sandy soil |
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Abstract Under the condition of temperature, a study on the thermodynamic adsorption of Trichloroethylene(TCE) in sandy and loam soil with different depths was carried out by batch adsorption methods. Meanwhile, theoretical adsorption and actual adsorption were compared on different particle sizes. The result showed that there was no saturated adsorption capacity in experimental range. The adsorption isotherms of TCE was non-linear both for the sandy and loam soils. The adsorption of TCE in soils fitted with Freundlich isotherm equation better than Langmuir model, and there was little deviation between theoretical and actual adsorption under different sizes; TCE adsorption isotherms resembled the L-type curves; TCE adsorption capacity was decreased with increasing temperature, and the sorption process was spontaneous exothermic reaction while the force of hydrogen bond was the driving force of sorption. In addition, there was significant difference (P<0.01) between organic matter and the size of soils.
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Received: 30 June 2013
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