复合高铁酸盐在水溶液中稳定性的研究

Study on Stability of Combined Ferrate Solution

用分光光度法和循环伏安法研究了复合高铁酸盐在水溶液中的稳定性,考察了静置时间、环境温度和助剂A对复合高铁酸盐稳定性的影响。实验结果表明,通过在复合高铁酸盐溶液中添加稳定助剂A,或降低高铁的储存温度,均可有效抑制复合高铁酸盐在水溶液中的分解速率,延长其储存周期,不同程度的改善其稳定性能;高铁在水溶液中的分解速率随着放置时间的增加而增加,随着助剂A加入量的增加而降低;高铁在水溶液中的循环伏安行为呈现一个单向的不可逆还原过程,其还原电流随着高铁放置时间的增加、溶液中FeO_4^(2-)有效浓度的降低而递减。

The stability of the combined ferrate in aqueous solution was studied by spectrophotometry and the cyclic voltammetry. The effects of environment temperature, placement time and amount of additive A were discussed in this paper. The results showed that the stability of the combined ferrate could be improved when a kind of additive A was added to the combined ferrate solution, and the temperature of reserving the combined ferrate solution was decreased. The decomposition rate of the combined ferrate in aqueous solutuin increased with increasing the placement time, and decreased with increasing the amount of additive A. The cycle voltammetric behavior of the combined ferrate in aqueous solution exhibited a one-way non-reversible reduction process. The reduction current decreased progressively with increasing the placement time of the combined ferrate, and with decreasing the effective concentration of FeO42- in aqueous solution.