Fe-Al2O3,Cu-Al2O3,Fe/Cu-Al2O3,La/Fe/Cu-Al2O3 particle electrodes are prepared through loading metals on Al2O3 particles,and used to construct three-dimensional electrode electrochemical systems to treat with 2,6-dimethylpyridine-containing wastewater.Influences of reaction conditions,different loading metals and the loading ratio of metals on the removal effect of dimethylpyridine by the system are investigated.It is shown that the optimal reaction conditions for removing dimethylpyridine are as follows:the current density is 24 mA·cm-2,the dosage of particle electrode is 11 g,the dosage of electrolyte is 1.3 g,and pH=7.Electrolyte dosage has the greatest influence,followed by current density,particle electrode dosage,pH.Under these conditions,the removal rates of dimethylpyridine by Fe-Al2O3 and Cu-Al2O3 as particle electrodes are 96.0％and 97.0％,respectively.Fe/Cu-Al2O3 electrode made in a Fe∶Cu ratio of 1∶4 can deliver a dimethylpyridine removal rate of 98.5％.The removal rate can reach 99.2％over La/Fe/Cu-Al2O3 electrode made under La∶Fe/Cu(1∶4)=1∶10.
关键词
氧化铝粒子电极/电化学/三维电极/2,6-二甲基吡啶/废水降解
Key words
alumina particle electrode/electrochemistry/three dimensional electrode/2,6-dimethylpyridine/waste water degradation
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