电位分析法研究外加盐对D354树脂吸附稀醋酸的影响

The Effect of External—Added Salts on Adsorption of Acetic Acid on D354 Resin by Potentiometry

利用电位分析法观察外加盐介质(LiCl、NaCl、KCl、MgCl2、CaCl2、SrCl2)对弱碱性树脂D354吸附低浓度醋酸溶液的影响。实验结果表明,在一定浓度盐介质的存在下,D354树脂吸附稀醋酸的过程是遵循单分子层吸附机制而进行的,其表观吸附速率常数(k)随着外加盐离子的浓度的增大而增大。

The behaviors of absorption of low concentration of acetic acid on D354 resions at different medium condition （external--added salts： LiCl, NaCl, KCl, MgCl2, CaCl2, SrCl2） were studied by potentiometry. The rate constant of apparent adsorption was evaluated by the kinetic equation of solid - liquid interface adsorption. The results show that the absorption of low concentration of acetic acid on D354 resins obeyed the monomolecular absorption mechanism and its rate of apparent absorption increased as the concentration of the medium increased.