Fenton试剂法深度处理焦化废水的研究及产物分析

Advanced Treatment of Coking Wastewater by Fenton Reagent Oxidation

以长治某焦化厂二级处理后的出水为研究对象,采用Fenton试剂法对其进行深度处理,在p H=3,反应时间120 min,转速为300 r/min条件下于磁力搅拌器中反应。可知,温度对反应影响最大,H2O2浓度次之,Fe2+浓度最后。相应的温度为40℃、Fe2+浓度为4 mmol/L,H2O2浓度为18 mmol/L。此时,处理后出水COD=95 mg/L,氨氮=1.62 mg/L均可达到《炼焦化学工业污染物排放标准》(GB 16171—2012)的要求。另外,经紫外扫描、UV254、GC/MS、BOD5/COD分析,可知焦化处理二级出水中含有CC双键的单环芳香族化合物,经Fenton试剂法处理后,CC双键断链,大分子物质转化为胺类和小分子物质,生化性能得到明显提高。实验结果表明Fenton试剂法是处理焦化废水的有效工艺。

Fenton reagent oxidation was used to treat secondary effluent from a coking plant in Changzhi city.Operation at initial p H of 3,reaction temperature of 40 ℃,H2O2 concentration of 18 mmol / L,reaction time of 120 min and the speed of 300 r / min using a magnetic stirrer,the effluent treated by Fenton reagent oxidation can reach the wastewater discharge standard（ GB 16171—2012）.In addition,the UV-Vis,UV254,GC /MS and BOD5/ COD shows secondary effluent from a coking plant containing C  C double bond of monocyclic aromatic compounds.After treatment by Fenton reagent,a scission occurred in C  C,which generate amine and small molecular substances,and increases biodegradation.Therefore,Fenton oxidation process is an effective means for treatment of coking wastewater.