高锰酸钾氧化法制备香紫苏内酯反应废水的有效处理

发布时间：2018-05-27 08:23

  本文选题：有效处理 + 废水　； 参考：《化学试剂》2016年03期

【摘要】：高锰酸钾氧化法是制备香紫苏内酯的一种主要方法,但该反应会产生大量的含Mn~(2+)废水,对环境造成污染。对实验废水的处理进行了研究,分别用饱和NaHCO_3、Na_2CO_3溶液调节废水的pH至中性,将废水中MnCO_3沉淀分离,最终达到有效处理废水的目的,最后采用高碘酸钾分光光度法对处理前后的废水中Mn~(2+)含量进行测定,处理前废水中Mn~(2+)含量为20.43 g/L,经NaHCO_3、Na_2CO_3处理后的废水样中Mn~(2+)含量分别为0.086 6、0.953 0 mg/L,均低于国标(GB 8978—1996)的最低排放标准2 mg/L。
[Abstract]:Potassium permanganate oxidation is one of the main methods for the preparation of perilla lactone, but the reaction will produce a large amount of wastewater containing Mn~(2, which will pollute the environment. The treatment of experimental wastewater was studied. The pH value of the wastewater was adjusted by saturated NaHCO _ 3H _ 2CO _ 3 solution, the MnCO_3 precipitation was separated from the wastewater, and the purpose of effectively treating the wastewater was achieved. Finally, the content of Mn~(2 in wastewater before and after treatment was determined by potassium periodate spectrophotometry. The content of Mn~(2 in waste water before treatment was 20.43 g / L, and the content of Mn~(2 in waste water treated with NaHCOS _ 3 was 0.953 mg / L, respectively, which was lower than the minimum discharge standard of GB 8978-1996 (2 mg / L).
【作者单位】： 北京工商大学食品学院食品风味化学北京市重点实验室;
【基金】：国家科技支撑计划资助项目(2011BAD23B01) 北京市教委科研计划一般资助项目(SQKM201610011003)
【分类号】：X783;O621.25
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本文编号：1941229