Fe_3O_4/Na_2S_2O_8体系处理垃圾渗滤液生化尾水的实验研究

Experimental study on the treatment of landfill leachate biochemical tail water by the Fe_3O_4/Na_2S_2O_8 system

采用Fe_3O_4/Na_2S_2O_8体系催化氧化处理垃圾渗滤液生化尾水,研究了Na_2S_2O_8与Fe_3O_4投加量、pH、反应时间等因素对处理效果的影响。结果表明,在pH=3,m(S_2O_8^(2-))∶12m(COD)=1.2,Fe_3O_4投加量为1.5 g/L,反应时间为24 h的条件下,COD与色度去除率分别为63%和100%。FTIR分析结果表明,Fe_3O_4/Na_2S_2O_8体系的小分子有机物含量比未处理水样小分子有机物含量有所降低。

The Fe3O4/Na2S2O8 system catalytic oxidation process has been used for treating landfill leachate biochemical tail water. The influences of the factors,such as the dosages of Na2S2O8 and Fe3O4,p H,reaction time,etc.on the treatment effects are studied. The results show that when p H is 3,m（S2O82-） ∶12m（COD） =1.2,Fe3O4dosage1.5 g/L,and reaction time 24 h,the removing rates of COD and chroma are 63% and 100%,respectively. Fourier transform infrared（FTIR） spectroscopy analytical results show that the contents of small molecular organic substances in Fe3O4/Na2S2O8 system are obviously reduced,compared with that of small molecular organic substances in untreated water samples.