论文部分内容阅读
本文对低价钼酸聚合物在201×7强碱性阴离子交换树脂上的吸附机理进行了研究,实验表明:1)低价钼酸聚合物在树脂上的吸附速度较钼酸盐的吸附速度慢,低价钼酸聚合物主要以六聚合物被吸附,而钼酸盐以四聚物被吸附;2)低价钼酸聚合物在树脂上主要以化学作用相吸附;占据着树脂的交换基团;3)低价钼酸聚合物的吸附曲线与钼酸盐的吸附曲线有明显的差异;4)低价钼酸聚合物和钼酸盐在树脂上的吸附符合层进反应机理,传质主要为通过已吸附层离子的扩散为控制的传质过程;5)吸附有低价钼酸聚合物的树脂比吸附有钼酸盐的树脂更难解吸,且不完全;氧化剂在解吸过程中有重要作用,稀硝酸作氧化剂较好。
In this paper, the adsorption mechanism of low molecular weight molybdic acid polymer on 201 × 7 strong basic anion exchange resin was studied. The experimental results show that: 1) The adsorption rate of low molecular weight molybdic acid polymer on resin is faster than that of molybdate Slow, low-cost molybdate polymers are mainly six polymers are adsorbed, and molybdate tetramer is adsorbed; 2) cheap molybdic acid polymer in the resin mainly by chemical adsorption; occupy the resin exchange 3) the adsorption curves of low molybdate polymers have obvious differences with the absorption curves of molybdates; 4) the adsorption of low molybdate polymers and molybdates on the resin accords with the mechanism of layer advance, The mass is mainly controlled by the diffusion of the adsorbed ion layer. (5) The resin adsorbed by the low molecular weight molybdic acid polymer is more difficult to desorb and incomplete than the molybdate-adsorbed resin. The desorption of oxidant during desorption In an important role, dilute nitric acid as oxidant better.