活性炭纤维阴极电催化协同Fenton处理垃圾渗滤液的试验研究

为探究电催化与芬顿(Fenton)协同技术对垃圾渗滤液深度处理的效果,通过试验方法,研究了电催化协同Fenton体系中电压(U)、水力停留时间(hydraulic retention time,HRT)、n(H_2O_2)/n(COD0)、n(H_2O_2)/n(Fe~(2+))对垃圾渗滤液去除率的影响,结果表明:电压是最主要的影响因素,在正交的基础上,通过单因素试验进一步得出了最佳电解条件为:U为5.5 V、HRT为50 min、n(H_2O_2)/n(COD0)为1.2、n(H_2O_2)/n(Fe~(2+))为2.0.试验对活性炭纤维(activated carbon fiber,ACF)/阴极比进行研究,发现比值为1∶2时,COD去除率最大.经吸附、Fenton、电解和电催化/Fenton的对比试验得出了ACF协同电催化降解有机物的途径.

Transfer Leachate Treatment by Electro Catalytic/Fenton Using Activated Carbon Fiber Cathode

To explore the treatment effect of electro catalysis and Fenton technology on the advanced treament of leachate, chemical oxidation by electro catalytic/Fenton ( EF) to deal with transfer leachate had been optimized using orthogonal experimental design. The variables considered were voltage, HRT, H2 O2/COD0 and H2 O2/Fe2+ molar ratio. Then the molar ratios of H2 O2 and COD0 , H2 O2 and Fe2+ were studied in detail. Furthermore, the activated carbon fiber ( ACF)/cathode area ratio was studied to show the effect of ACF on the COD removal. Results show that voltage has the largest effect on COD removal ratio. The optimum operating conditions are decided as voltage of 5. 5 V, HRT of 50 min, H2 O2 and COD0 molar ratio of 1. 2, H2 O2 and Fe2+ molar ratio of 2. 0. When the area ratio of ACF and cathode is 1:2, the COD decreases at most. The degradation pathway of COD in leachate using electro catalytic/Fenton is obtained by the comparative experiments of adsorption, Fenton, electrolytic and electro catalytic/Fenton.