材料期刊网

针对硅钢钝化液废水利用NaHSO3处理Cr6+、CODCr超标的难题，改用FeSO4和H2O2为处理剂，利用Fe2+的还原性和在酸性条件下Fe2+与H2O2形成Fenton试剂的催化氧化特性，对废水中的Cr6+和CODCr进行同步去除。FeSO4/H2O2处理硅钢钝化液废水适宜参数为：n(Fe2+)：n(H2O2)=1∶2、pH=3-4、温度15-35℃，1克Cr6+对应投加FeSO4 0.1mol。在此条件下，可使初始浓度为Cr6+=2959mg/L、CODCr=1351mg/L的废水，处理后Cr6+、CODCr分别降为0.421mg/L、25.6mg/L，去除率为99.99%和98.11%，达到了《钢铁工业水污染物排放标准》(GB 13456-92)中的一级排放要求。

To improve the low efficiency in Silicon Steel wastewater treatment, FeSO4/H2O2 was used to treat this water. The method utilized the reducibility of Fe(Ⅱ) to reduce Cr(Ⅵ) to Cr(Ⅲ), and reduce the CODCr value with the catalysis-oxidation properties of Fenton reagent which generated by the reaction between Fe(Ⅱ) and H2O2 in the acid solution. The best parameter was: n(Fe2+)：n(H2O2)=1∶2, Fe2+ dosage 0.1mol/g Cr6+, pH value 3-4, temperature 15-35℃. When CODCr of influent was 1351mg/L, Cr(Ⅵ) concentration was 2959mg/L, the effluent concentration of CODCr and Cr(Ⅵ) was 25.6mg/L and 0.421mg/L respectively, both of them could be controlled below the Chinese discharge standard of GB 13456-92, the removal rate of Cr(Ⅵ) and CODCr was 99.99% and 98.11%.