铁炭微电解-Fenton氧化法预处理喹吖啶酮颜料中间体废水

采用铁炭微电解-Fenton氧化法对含喹吖啶酮颜料中间体有机废水进行预处理。得到微电解的最佳条件是:pH值为5、铁水体积比为0.375、铁炭体积比为1、反应停留时间为60 min;且这4因素的影响顺序是pH值>铁屑投加量>铁炭体积比>停留时间。Fenton氧化法的最佳条件是:pH值为4～7、反应时间为50 min、FeSO4和H2O2投加量分别为300 mg/L和2.5 mL/L。试验结果表明,将这两种方法联合对含喹吖啶酮颜料中间体有机废水的处理效果十分明显,在最佳试验条件下,当进水COD质量浓度为16 800 mg/L,色度为20 000倍时,COD的总去除率达到94%以上,出水色度小于40倍,为后续处理创造了有利条件。

Pretreatment of quinacridinone pigment-intermediate wastewater by ferric-carbon microelectrolysis combined Fenton oxidation process

Quinacridinone pigment-intermediate wastewater was pretreated by ferric-carbon microelectrolysis combined Fenton oxidation process.The optimal condition for the microelectrolysis was: the pH value was 5,the volume ratio of iron and water was 0.375,the iron-carbon ratio was 1,the reaction time was 60 min;the most important parameter for ferric-carbon microelectrolysis was pH value,successively followed with the dosage of scrap iron,volume ratio of scrap iron and carbon,reaction time.The optimal condition for Fenton oxidation process was: the pH was 4-7,the reaction time was 50 min,the dosage of FeSO4 and H2O2 were 300 mg/L and 2.5 mL/L respectively.the results of the test showed that,combined the two processes to treat quinacridinone pigment-intermediate organic wastewater could obtain an obvious effect,under the optimal condition,when the mass concentration of COD in influent water was 16 800 mg/L,the colority was 20 000 times,the total removal rate of COD was above 94%,the colority of the effluent water was lower than 40 times,which created an advantageous condition for the following treatment.