PS-HQD树脂吸附废水中Cu~(2+)的动力学与热力学研究

为进一步探讨8-羟基喹哪啶树脂(PS-HQD)吸附废水中Cu~(2+)的吸附机理,用静态法研究了PS-HQD吸附Cu~(2+)的动力学与热力学规律等吸附性能。结果表明:在实验条件下,ΔH0、ΔS0说明PS-HQD对Cu~(2+)的吸附过程为吸热的熵增过程,ΔG0表明吸附过程能够自发进行,准二级动力学Lagergren方程更适合描述此吸附过程。PS-HQD第5次吸附的再生效率仍可达到83.84%,说明PS-HQD对Cu~(2+)的吸附具有良好的再生性能。

Study on adsorption kinetics and thermodynamics of Cu~(2+) with 8-Hydroxyquinoline chelate resin in wastewater

To further explore the adsorption mechanism of 8-Hydroxyquinadine chelate resin( PS-HQD) for Cu~(2+)in wastewater, the adsorption isotherm and kinetics property of PS-HQD for Cu~(2+)were studied with static adsorption. The results showed that the Lgergren pseudo-second order kinetic model was more suitable for describing the adsorption process. In the adsorption process of PS-HQD for Cu~(2+),both the enthalpy change ΔH and entropy change ΔS were positive, while the free energy change ΔG was negative,it was indicated that the adsorption process was aendothermic, entropy increasing and spontaneous process under the experimental conditions. It's regeneration efficiency could still reach 83.84% when the resin could be adsorbed and eluted Cu2+for five times, it showed that PS-HQD had good regeneration performance for Cu~(2+).