零价铁活化过硫酸铵氧化降解APMP废水

Oxidation Treatment of APMP Effluent by Activating Ammonium Persulfate with Zero-Valent Iron

采用零价铁活化过硫酸铵对APMP制浆废水进行氧化处理,研究优化了处理工艺条件,目的在于探讨该技术在高得率浆废水处理上的应用可行性。优化后的工艺条件为:对于初始pH值5.0、CODCr 910 mg·L-1、色度2295 C.U.的废水,在零价铁加入量1.34 g·L-1、过硫酸铵加入量10.92 g·L-1、反应时间120 min的条件下,处理后废水的CODCr下降到241 mg·L-1、色度下降至30 C.U.,CODCr和色度去除率分别达到65.96%和98.68%。零价铁活化过硫酸铵氧化法主要对酚类、有机酸类、含氮类的物质降解效果明显,Fenton法对一些有机酸类、脂类、醛类的物质降解效果明显。虽然零价铁活化过硫酸铵在脱色方面效果显著,但处理后废水的高盐度将成为其大规模应用的最大障碍。

Treatment of papermaking APMP wastewater by advanced oxidation technology of activating ammonium persulfate with zero-valent iron can producing sulphate radical, The effects of pH, amount of iron powder, amount of ammonium persulfate, reaction time on the degradation rate of COD and color are studied. The results showed that on the acidic conditions, sulphate radical can degrade organic pollutants well. When the initial COD is 910 mg·L-1, color is 2295 C.U., the pH is 5.0, the amount of iron powder is 2.68 g·L-1, the amount of ammonium persulfate is 21.84 g·L-1, the reaction time is two hours, the removal rate of COD is 65.96%, the removal rate of color is 98.68%.