中文摘要：

采用D301弱碱性离子交换树脂对水溶液中低浓度甲酸进行分离。静态条件下考察了时间、温度、振荡速率和树脂用量对分离效果的影响,获得了交换等温线;动态条件下考察了不同高径比、流速、温度、浓度下动态穿透曲线;研究了树脂再生效果与稳定性。初始浓度573mg/L的甲酸废水,在树脂用量2.5g/L、温度35℃、振荡速率160r/min条件下,最大交换量为154.16mg/g;其交换等温线符合Langmuir方程,热力学平衡方程计算得G〈0,H=10.25kJ/mol,S〉0,表明该吸附过程是自发的、吸热、熵增加的过程。交换过程中颗粒扩散是离子交换的主要速率控制步骤,表观活化能与反应级数分别为5.983kJ/mol和0.378。

英文摘要：

The low-concentration formic acid was separated in aqueous solution by weakly basic ion exchange resin D301.The factors influencing the separation,such as separation time,temperature,rotational speed,and the amount of resin of formic acid were investigated under static condition.The exchange isotherms were obtained.The ratio of height to diameter,velocity,temperature,and the concentration of formic acid were investigated under dynamic condition,and the breakthrough curves were determined.The resin regeneration effect and the stability were studied.The kinetic results showed that Langmuir isotherm fitted well with the experimental data,the thermodynamic equilibrium functions ΔG0,ΔH=10.25kJ/mol,ΔS0 were determined,so the adsorption was spontaneous,endothermic and entropy increasing.When the resin dosage was 2.5g/L;35℃;the oscillation rate of 160r/min and the initial concentration of formic acid wastewater was 573mg/L,the maximum exchange capacity was 154.16mg/L.The ion-exchange process was found to be controlled by the intra-particle diffusion.The apparent activation energy was 5.983kJ/mol,and the reaction order was 0.378.