【摘要】 实验研究了钒(Ⅴ)在D201树脂上的吸附行为,并从热力学和动力学方面对吸附过程进行了分析。结果表明:D201树脂对钒(Ⅴ)的吸附为吸热过程,且符合Freundlich和Langmuir等温吸附方程;测得吸附热力学参数:ΔH=3.88 kJ/mol,ΔS=0.082J/(mol.K),ΔG=-20.77 kJ/mol;吸附动力学研究表明,D201树脂吸附钒(Ⅴ)的平衡时间为12 h;颗粒扩散速率为D201树脂吸附钒(Ⅴ)的主要控制步骤;测得不同温度下D201树脂吸附钒(Ⅴ)的表观速率常数为:k298K=2.34×10-5s-1、k308K=2.40×10-5s-1、k318K=2.91×10-5s-1;表观吸附活化能为Ea=8.43 kJ/mol。更多还原

【Abstract】 The adsorption behavior of vanadium(Ⅴ)on D201 resin was studied experimentally,and the adsorption process was analyzed from the aspects of thermodynamics and kinetics.The results showed that the adsorption of D201 resin for vanadium(Ⅴ)was an endothermic process and the equilibrium adsorption data fit to both Freundlich and Langmuir isothermal adsorption equations.The adsorption thermodynamic parameters were that ΔH=3.88 kJ/mol,ΔS=0.082 J/(mol·K) and ΔG=-20.77 kJ/mol.Studies of adsorption kinetics showed that the equilibrium time of D201 was 12 h,and the process was controlled by ion diffusion throught particles.The apparent rate constants of D201 resin adsorpting V measured at different temperature were that k298K=2.34×10-5 s-1、k308K=2.40×10-5 s-1 and k318K=2.91×10-5 s-1and the apparent adsorption activation energy was that Ea=8.43 kJ/mol.更多还原