电化学氧化法去除电解锰渣中的氨氮

发布时间：2018-02-28 08:26

  本文关键词： 电化学氧化法 氨氮 锰离子 氯离子 间接氧化　出处：《环境化学》2016年12期 　论文类型：期刊论文

【摘要】：电解锰渣中含有大量的氨氮严重破坏生态环境.实验采用化学氧化法去除电解锰渣中的氨氮.通过X射线衍射(XRD)、X射线荧光分析(XRF)以及可见分光光度计等检测方法,分析了电解锰渣处理前后的结构和成分,研究了电化学氧化法处理锰渣中氨氮的工艺条件.结果表明,存在于电解锰渣中含量较高的锰离子优先在极板上发生氧化反应,生成的二氧化锰对氨氮的氧化具有抑制作用.通过碳酸钠固化锰离子后,在氯离子浓度为200 mg·L~(-1)、电压为20 V、pH值为7的实验条件下,电解锰渣中起始浓度为203.06 mol·L~(-1)的氨氮在180 min内完全去除.
[Abstract]:A large amount of ammonia nitrogen in electrolytic manganese slag seriously damages the ecological environment. The chemical oxidation method is used to remove ammonia nitrogen from electrolytic manganese slag. X-ray diffraction (XRD) and X-ray fluorescence analysis (XRF) and visible spectrophotometer are used to detect the ammonia nitrogen in electrolytic manganese slag. The structure and composition of electrolytic manganese slag before and after treatment were analyzed, and the process conditions of treating ammonia nitrogen in manganese slag by electrochemical oxidation method were studied. The results showed that manganese ions with high content in electrolytic manganese slag preferentially oxidized on the electrode plate. The manganese dioxide produced can inhibit the oxidation of ammonia nitrogen. After solidifying manganese ion with sodium carbonate, the concentration of chlorine ion is 200 mg 路L ~ (-1), the voltage is 20 V ~ (-1) and pH value is 7, when the concentration of chlorine ion is 200 mg 路L ~ (-1), and the voltage is 20 V ~ (-1). Ammonia nitrogen with initial concentration of 203.06 mol 路L ~ (-1) in electrolytic manganese slag was completely removed within 180 min.
【作者单位】： 重庆大学化学化工学院;洁净能源与资源高效利用化工过程重庆市重点实验室;
【基金】：国家自然科学基金(51404043)资助~~
【分类号】：X757
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