Cu^(2+)和Co^(2+)促进芬顿氧化处理垃圾渗滤液的研究

Study on Cu^(2+)and Co^(2+)Promoting Fenton Oxidation Treatment of Landfi ll Leachate

通过在传统芬顿体系中加入Cu^(2+)、Co^(2+),研究Cu^(2+)/Co^(2+)/Fe^(2+)/H_(2)O_(2)、Cu^(2+)/Fe^(2+)/H_(2)O_(2)、Co^(2+)/Fe^(2+)/H_(2)O_(2)和Fe^(2+)/H_(2)O_(2)四种芬顿体系对垃圾渗滤液的处理效果,发现当初始pH分别为2、3、4、5、6时,各体系去除COD_(Cr)的效果排序为Cu^(2+)/Co^(2+)/Fe^(2+)/H_(2)O_(2)>Cu^(2+)/Fe^(2+)/H_(2)O_(2)>Co^(2+)/Fe^(2+)/H_(2)O_(2)>Fe^(2+)/H_(2)O_(2),Cu^(2+)、Co^(2+)对芬顿反应效果的提升具有促进作用;Cu^(2+)/Co^(2+)/Fe^(2+)/H_(2)O_(2)和Cu^(2+)/Fe^(2+)/H_(2)O_(2)体系比传统芬顿体系具有更宽的pH响应范围;Cu^(2+)、Co^(2+)的引入明显加快芬顿反应速率,反应时间可由3h缩短至2h。在Cu^(2+)/Co^(2+)/Fe^(2+)/H_(2)O_(2)体系中,m(H_(2)O_(2)):m(COD_(Cr))比值下降至2.4:1,COD_(Cr)去除率仍高达93%,具有优异的处理效果。

By adding Cu^(2+)and Co^(2+)to the traditional Fenton system,the treatment effects of Cu^(2+)/Co^(2+)/Fe^(2+)/H_(2)O_(2),Cu^(2+)/Fe^(2+)/H_(2)O_(2),Co^(2+)/Fe^(2+)/H_(2)O_(2) and Fe^(2+)/H_(2)O_(2) on landfill leachate were studied.It was found that when the initial pH was 2,3,4,5 and 6,the order of COD_(Cr) removal effect of each system was Cu^(2+)/Co^(2+)/Fe^(2+)/H_(2)O_(2)>Cu^(2+)/Fe^(2+)/H_(2)O_(2)>Co^(2+)/Fe^(2+)/H_(2)O_(2)>Fe^(2+)/H_(2)O_(2).Cu^(2+)and Co^(2+)promoted the improvement of Fenton reaction effect.System Cu^(2+)/Co^(2+)/Fe^(2+)/H_(2)O_(2) and Cu^(2+)/Fe^(2+)/H_(2)O_(2) has a wider pH response range than the traditional Fenton system.The introduction of Cu^(2+)and Co^(2+)significantly accelerated the Fenton reaction rate,which can shorten the reaction time from 3 hours to 2 hours.In the system of Cu^(2+)/Co^(2+)/Fe^(2+)/H_(2)O_(2),the ratio of m(H_(2)O_(2)):m(COD_(Cr))decreased to 2.4:1,and the COD_(Cr) removal rate was still as high as 93%,which had excellent treatment effect.