Bilgiç Ceyda
Department of Chemical Engineering, Faculty of Engineering and Architecture, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey E-mail:
Water Sci Technol. 2018 May;2017(2):319-328. doi: 10.2166/wst.2018.136.
Inverse gas chromatography (IGC) was applied to characterize the surface of kaolinite. The adsorption thermodynamic parameters (the standard enthalpy (∆H), entropy (∆S) and free energy of adsorption (∆G), the dispersive component of the surface energy (γ), and the acid/base character of kaolinite surface were estimated by using the retention time of different non-polar and polar probes at infinite dilution region. The specific free energy of adsorption (∆G), the specific enthalpy of adsorption (∆H), and the specific entropy of adsorption (∆S) of polar probes on kaolinite were determined. (∆G) values were correlated with the donor and modified acceptor numbers of the probes to quantify the acidic (K) and the basic (K) parameters of the kaolinite surface. The values obtained for the parameters K and K indicated a basic character for kaolinite surface.
采用反相气相色谱法（IGC）对高岭土表面进行表征。利用不同非极性和极性探针在无限稀释区域的保留时间，估算了吸附热力学参数（标准焓（∆H）、熵（∆S）和吸附自由能（∆G））、表面能的色散分量（γ）以及高岭土表面的酸碱性质。测定了极性探针在高岭土上的比吸附自由能（∆G）、比吸附焓（∆H）和比吸附熵（∆S）。（∆G）值与探针的给体数和改性受体数相关，以量化高岭土表面的酸性（K）和碱性（K）参数。K和K参数的值表明高岭土表面具有碱性特征。
