FeO_4^(2-)在碱性缓冲水溶液中的稳定性

Study on the Stability of FeO_4^(2-) in Basic Buffer Solution

研究了在pH=9.40的碱性缓冲水溶液中,K2FeO4初始浓度、温度以及不同介质对FeO24-稳定性的影响。结果表明,随K2FeO4初始浓度和温度升高,FeO42-稳定性下降;Fe3+使FeO42-稳定性迅速下降,且加入氯化铁的FeO42-比加入硝酸铁的FeO42-稳定;磷酸钠和草酸钠使FeO24-的稳定性降低,而氯化钾、氯化钠、醋酸钠能不同程度地增强FeO42-的稳定性,其中氯化钾的效果最好。

The effects of initial concentration of K2FeO4,temperature and different mediums on stability of FeO4^2- in the alkaline buffer solution（pH=9.40）were investigated. The results showed that the stability of FeO4^ 2- in the alkaline buffer solution decreases with the initial concentration of K2FeO4 or temperature increasing; Fe ^3＋ can make the stability of FeO4^ 2- turn bad greatly,and the stability of FeO4^ 2- with FeCl3 is better than that with Fe（NO3）3; sodium oxalate and sodium phosphate will accelerate decomposing of FeO4^2- , but potassium chloride, sodium chloride and sodium acetate can strengthen the stability of FeO4^2- , and the effect of potassium chloride is the best among them.