Abstract:

The Fe₃O₄/Na₂S₂O₈ system catalytic oxidation process has been used for treating landfill leachate bio-chemical tail water. The influences of the factors,such as the dosages of Na₂S₂O₈ and Fe₃O₄,pH,reaction time,etc. on the treatment effects are studied. The results show that when pH is 3,m(S₂O₈^2-):12m(COD)=1.2,Fe₃O₄ dosage 1.5 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.

Key words: leachate biochemical tail water, Na₂S₂O₈, Fe₃O₄, catalytic oxidation

摘要：

采用Fe₃O₄/Na₂S₂O₈体系催化氧化处理垃圾渗滤液生化尾水,研究了Na₂S₂O₈与Fe₃O₄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(S₂O₈^2-):12m(COD)=1.2,Fe₃O₄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,Fe₃O₄/Na₂S₂O₈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。

关键词: 渗滤液生化尾水, Na₂S₂O₈, Fe₃O₄, 催化氧化

CLC Number: 

• X703.1