离子交换纤维吸附Cr(Ⅵ)的热力学研究

Thermodynamic Study on Adsorption of Cr(Ⅵ) on Ion Exchange Fiber

采用离子交换纤维对Cr（VI）的吸附性能进行了研究，在温度298～318K和研究的浓度范围内，离子交换纤维对Cr（vi）的吸附平衡数据符合Freundlich吸附等温方程。Freundlich等量吸附焓表明，离子交换纤维对Cr（VI）的吸附是吸热过程，并对吸附焓、自由能、吸附熵进行了计算，并对吸附行为进行了合理解释。

The adsorption of Cr（VI） by using ion exchange fiber adsorbent was studied. Equilibrium data for adsorption of Cr（VI） from aqueous solution by ion exchanged fiber adsorbent within the temperature range of 298 -318K and observed concentration range were obtained with the Freundlich -type isotherm equations. Freundlich equivalent adsorptive enthalpy of the adsorption of Cr（VI） indicated that the process of adsorption of Cr（VI） from aqueous solutions by ion exchange fiber was an endothermic process. Estimations of adsorptive enthalpy, free energy, and entropy of adsorption were reported, and the adsorption behavior was reasonably interpreted.