【摘要】 以垃圾渗滤液生化出水为研究对象,利用Ti/RuO₂阳极、铁网双极电极及Cu-Zn阴极组成的Ti/RuO₂-Fe-Cu/Zn电化学体系进行电化学降解研究,讨论了电流密度、氯离子浓度和初始pH值对反应的影响及双极电极的作用.研究结果表明,当电流密度为100 m A·cm-2、初始氯离子浓度为2840 mg·L-1及初始pH值为8.5时,污染物的降解效率最高,电解4 h时,CODCr、NH+4-N、TN和TOC的去除率可分别达到94.12%、99.55%、94.17%和61.65%;在Ti/RuO₂-Fe-Cu/Zn电化学体系中,铁网电极的存在不仅可以强化有机物去除,并且可以有效抑制硝酸盐的积累,提升TN的去除能力;三维荧光分析表明,电解3 h,类蛋白质类物质和类腐殖质类物质荧光强度分别降低53.41%和71.02%,有机物矿化度升高.更多还原

【Abstract】 An electrochemical system composed of Ti/RuO₂ anode,iron net bipolar electrode and Cu-Zn cathode（Ti/RuO₂-Fe-Cu/Zn system） was developed for the degradation of biologically treated landfill leachate. The influence of current density,chloride concentration and the initial pH was investigated. It was found that,after 3 h reaction,the removal efficiency of CODCr,NH+4-N,TN and TOC was up to 87. 5%,99. 4%,92. 6% and 60. 8% respectively when the current density was100 m A·cm-2,the initial chloride concentration was 2840 mg·L-1 and the initial pH was 8.5. The iron net in the electrochemical system not only enhanced organic removal but also in hibited the accumulation of nitrate nitrogen,consequently improving the TN removal efficiency. Furthermore,the result of three-dimension fluorescence analysis showed that after the 3 h reaction, the fluorescence intensity of protein-like substances and humus-like substances decreased by 53. 41%and 71.02%,respectively,and then the mineralization degree of organic matter increased.更多还原