Abstract
A study involving measurement and analysis of vapor-phase adsorption of chloroform on dry soils was conducted. Experimental adsorption and desorption data were gravimetrically obtained at (15, 20, and 25) °C on two soil samples with different properties. Thermal effects were evaluated through isosteric enthalpy of adsorption and enthalpy curves. The results showed that the adsorption of chloroform on soil was physical adsorption and both adsorbents had energetically heterogeneous surfaces. Equilibrium isotherms were Type II; however, they did not exhibit significant hysteresis upon desorption. Experimental data were correlated by using well-known multilayer isotherm models. The BET model delivered accurate correlations only in the monolayer region, within a deviation range of 1.1% to 4.8%. The GAB equation provided a much better correlation of the entire data set, including mono- and multilayer regions, with error percentages ranging from 1.3% to 4.3%.
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