摘要
本文研究了回收利用湿法制备K_2FeO_4晶体后的残留母液,制取决氨酸盐混合溶液.氧化Fe(Ⅲ)、→Fe(Ⅵ)的方法,探讨了混合次氯酸盐浓度、铁盐添加量、反应体系碱浓度等对高铁转化率的影响.证明这种方法可以制得纯度90%以上的高铁酸钾晶体,Fe(Ⅲ)的转化率亦在90%以上.由于使用混合碱液使过滤、氧化等操作时间大大缩短,同时实现了废物利用.
The hypochlorite mixture (NaClO + KClO) made of NaOH-KOH solution and Cl2 , can oxidize Fe (Ⅲ ) to Fe (Ⅵ), and produce K2FeO4 crystals with purity more than 95% . More than 90% of Fe (Ⅲ) can be converted to Fe (Ⅵ) by this method efficiently. The effects of hypochlorite mixture concentration, Fe(OH)3 dose and concentration of aqueous alkali on the oxidation of Fe (Ⅲ ) to Fe (Ⅵ) were studied. This method has the merits of save operational time and recycling waste solutions.
出处
《环境化学》
CAS
CSCD
北大核心
1999年第2期173-177,共5页
Environmental Chemistry
基金
国家自然科学基金资助项目 批准号29677028
关键词
高铁酸盐
化学氧化
絮凝剂
湿法
废水处理
potassium ferrate, chemical oxidation, hypochlorite mixture, recycled solution .
