缓蚀剂钼酸盐插层水滑石对Cl^-吸附行为的研究

Study on Adsorption of Chloride Ion on Molybdate Intercalated Hydrotalcite

以缓蚀剂钼酸盐插层水滑石(HT-MoO42-)为吸附剂,对NaCl溶液中的Cl-进行吸附,探讨了吸附时间、温度和Cl-初始浓度等因素对吸附的影响。测定了HT-MoO42-吸附Cl-前后的元素组成变化,测定了吸附等温线和吸附动力学曲线。结果表明,该吸附反应为介孔单分子层与多分子层吸附相结合,在70 h内达到吸附平衡,吸附量随Cl-初始浓度、温度的增加而增大,吸附过程遵循Lagergren二级反应动力学过程,相关系数R2为0.9981。

Corrosion inhibitor molybdate intercalated hydrotalcite as absorbent were used to adsorb CI- from NaC1 solu- tion. The effects of the adsorption time, adsorption temperature and initial concentration of the adsorbate （ CI- ） were investiga- ted. The element change of HT-MoO42- powers was admeasured before and after adsorption CI-, and adsorption isotherm and ad- sorption kinetic curve were determined. The experimental results showed that the adsorption reaction mainly proceeded in the form of Mesoporous monolayer combined with multilayer adsorption. The adsorption reached balance within 70h. The adsorption capacity was enhanced with the increase of initial chloride concentrations and temperature. The adsorption kinetics was followed Lagergren pseudo-second-order kinetic model with correlation coefficients of 0. 9981.