Mg-Zn-Ca非晶合金对酸性红偶氮颜料的降解能力

Degradation ability of Mg-Zn-Ca amorphous alloys on acid red azo dye

为了有效降低酸性红偶氮颜料废水对环境的危害,研究了Mg-Zn-Ca合金的非晶形成能力与非晶条带的循环使用次数对废水的降解速率和脱色率的影响.结果表明,当x不大于4时,M g71+xZn24-xCa5合金可以形成非晶条带.降解速率和脱色率随非晶条带中Mg含量的增加而提高,Mg71Zn24Ca5、Mg73Zn22Ca5和Mg75Zn20Ca5合金与废水作用1 h后的脱色率分别达到83.56%、85.75%和87.18%.脱色反应前后非晶条带的结构基本不变,表明非晶合金具有循环使用特征.非晶合金中Ca元素可以优先富集形成矿化物质,从而造成Mg元素在合金表面的富集,这成为非晶合金的降解能力并未显著降低的主要原因.

In order to effectively reduce the harmful effect of acid red azo dye wastewater on the environment, the amorphous forming ability of Mg-Zn-Ca alloys and the effect of recycling use times of amorphous ribbons on the degradation rate and decolorization ratio of wastewater were investigated. The results indicate that when x is not larger than 4, the amorphous ribbons can be obtained for the Mg71＋xZn24-xCa5 alloys. The degradation rate and decolorization ratio increase with increasing the Mg content in the amorphous ribbons. When the Mg71Zn24Ca5, Mg73Zn22Ca5 and Mg75Zn20Ca5 alloys react with the wastewater for 1 h, the decolorization ratio are 83.56%, 85.75% and 87.18%, respecctively. Furthermore, the amorphous structure of ribbons is basically unchanged before and after the decolorization reaction. It indicates that the amorphous alloys have the recycling use characteristics. The Ca element in the amorphous alloys preferentially enriches and forms the mineralized materials, resulting in the enrichment of Mg element on the surface of the alloys, which is the main reason for the degradation ability of the alloys not to obviously reduce.