(1. 沈阳工业大学 材料科学与工程学院，沈阳 110870；
2. 辽宁省轻合金重点实验室，沈阳 110870)
摘 要: 采用单辊甩带法制备Mg71+xZn24-xCa5(x=0, 2, 4和6)合金条带，研究合金中Mg含量对条带非晶结构形成的影响、非晶条带对直蓝偶氮颜料废水的脱色降解能力和循环使用次数。结果表明：Mg71+xZn24-xCa5(x=0, 2, 4和6)合金在x≤4时，能形成厚度为20~25 μm的具有非晶结构的条带。非晶条带对直蓝溶液的降解速率和脱色率随Mg含量的提高而提高，其中Mg75Zn20Ca5非晶条带在2 min内使溶液澄清，以反映特征时间表示的降解速率仅为0.47 min，以吸光度所计算的脱色率达到95.41%。与废水反应60 min后的条带，其非晶结构基本不变，表面反应产物为矿化物质，不具备污染特征。Mg75Zn20Ca5非晶条带至少可以循环使用4次以上，而保持降解能力不低于80%。
关键字: Mg-Zn-Ca；非晶条带；直蓝偶氮染料；降解能力；脱色率；循环使用
（1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China;
2. State Key Laboratory for Light Metals of Liaoning, Shenyang 110870, China）
Abstract:Ribbons with composition of Mg71+xZn24-xCa5 (x=0, 2, 4 and 6) were prepared by melt-spun method. The influence of Mg content in the investigated alloys on amorphous structure formation, the decolorization ability and the recycle used times of the amorphous ribbons in degrading the direct blue (DB) azo wastewater were investigated. The results show that amorphous ribbons with thickness of 20-25 μm can be obtained when x≤4 for Mg71+xZn24-xCa5 (x=0, 2, 4 and 6) alloys. The degrading rate and decolorization percentages increase with the Mg content for the amorphous ribbons when they act with the DB solution. Wherein, the degradation time when the solution become clear is 2 min, the characteristic time used to indicate the degrading rate is only 0.47 min, and the decolorization percentages calculated by absorbance rate is 95.41% for the Mg75Zn20Ca5 amorphous ribbon. Furthermore, the amorphous structure is basically unchanged after the reaction for 60 min in wastewater for the ribbon, and the reacted products on the surface of the ribbons is the mineralization substance, which does not have the pollution characteristics. Mg75Zn20Ca5 amorphous ribbons can be recycled at least 4 times while maintaining the degradation capacity of not less than 80%.
Key words: Mg-Zn-Ca; amorphous ribbon; direct blue azo dye; degradation ability; decolorization percentage; recycling use
