不同Fe(Ⅲ)化合物与ClO-热溶液中化学反应的跟踪观察  

Tracing Reactions between Different Ferric Compounds and ClO-in High Alkaline Hot Solution

作　　者：贾汉东[1] 关彩霞[1] 

机构地区：[1]郑州大学化学系,郑州450052

出　　处：《无机化学学报》2006年第11期2043-2048,共6页Chinese Journal of Inorganic Chemistry

基　　金：河南省教育厅科技攻关项目(No.200060001)资助。

摘　　要：采用分光光度法跟踪5种不同的Fe!化合物分别与高碱度NaClO溶液共热到80℃时所发生的变化,发现Fe!首先被氧化为Fe";在聚合硫酸铁、六氟合铁酸钾和氢氧化铁参与的反应体系中,Fe"在分解生成Fe(OH)3沉淀的同时,还有Fe"紫色溶液变成Fe#绿色溶液的反应存在;在硝酸铁和三氯化铁参与的反应体系中,只有Fe"分解生成Fe(OH)3沉淀的反应存在。在反应过程中,聚合硫酸铁、硝酸铁所参与的反应体系中,前者生成Fe$溶液浓度最高:1.25×10-3mol·L-1,后者生成Fe"溶液浓度最高:0.23mol·L-1。Five different ferric compounds reacted respectively at 80 ℃ with sodium hypochlorite in the high alkaline. When reactions were traced using spectrophotometry method, the ferric compounds were oxidized firstly to ferrate（Ⅵ）, the ferrate（Ⅵ） solution was decomposed into ferric hydroxide precipitation and at the same time the purple ferrate（Ⅵ） solution was converted into the green ferrate（Ⅳ） solution in the reaction system of polyferric sulfate, potassium fluoferrite and ferric hydroxide; but the ferrate（Ⅵ） solution was decomposed only into ferric hydroxide precipitation in the system of ferric nitrate and ferric chloride. In the system involved with polyferric sulfate and ferric nitrate, the highest concentration of ferrate（Ⅳ） （CFe（Ⅳ）=1.25 mmol·L^-1） was formed with polyferric sulfate system while the highest concentration of ferrate（Ⅵ） （CFe（Ⅵ）=0.23 mol· L^-1） was generated for the ferric nitrate system.

关 键 词：高铁(Ⅲ)酸盐 高铁(Ⅳ)酸盐 转化反应 分光光度法 

分 类 号：O614.811[理学—无机化学]