Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan.
R&D Center for Membrane Technology, Department of Chemical Engineering, Chung Yuan Christian University, Chungli, Taiwan.
Bioresour Technol. 2016 Dec;222:513-516. doi: 10.1016/j.biortech.2016.09.125. Epub 2016 Oct 1.
The standard Gibbs free energy, enthalpy and entropy change data for adsorption equilibrium reported in biosorption literature during January 2013-May2016 were listed. Since the studied biosorption systems are all near-equilibrium processes, the enthalpy and entropy change data evaluated by fitting temperature-dependent free energy data using van Hoff's equation reveal a compensation artifact. Additional confusion is introduced with arbitrarily chosen adsorbate concentration unit in bulk solution that added free energy change of mixing into the reported free energy and enthalpy change data. Different standard states may be chosen for properly describing biosorption processes; however, this makes the general comparison between data from different systems inappropriate. No conclusion should be drawn based on unjustified thermodynamic parameters reported in biosorption studies.
列出了 2013 年 1 月至 2016 年 5 月生物吸附文献中报道的吸附平衡标准吉布斯自由能、焓和熵变化数据。由于所研究的生物吸附系统都是近平衡过程，因此使用范霍夫方程拟合温度相关自由能数据评估的焓和熵变化数据会产生补偿假象。在报告自由能和焓变数据时，在主体溶液中任意选择吸附质浓度单位会导致混合自由能变化的添加，这进一步增加了混淆。可以选择不同的标准状态来正确描述生物吸附过程；然而，这使得不同系统之间的数据比较变得不合适。不应该根据生物吸附研究中报告的不合理热力学参数得出结论。
