Gneuss Kunststofftechnik:PET非织造纤维废料的回收

在聚酯（PET）非织造布的生产过程中,各流程都会产生不同类型与数量的废料,如在启动过程、边缘裁剪及从纤维网上裁剪工艺部件时,都会产生一定的废料。废料在生产材料中占相对较高的比例。理想情况下,这些废料都可作为原材料重新应用。

Basic Physical Properties and Degradability of Tungsten Wire Fibers

In order to explore the feasibility of tungsten filament as biomedical metal material,this article conducted a series of performance tests on two different thicknesses of black tungsten filament and two different thicknesses of white tungsten filament.It mainly tested the basic physical properties of the tungsten filament including the longitudinal cross-section of the fiber,the fiber diameter,the mechanical properties of the fiber and the biodegradability,and analyzed the results.The results showed that the breaking force of tungsten filament was about 3000MPa.And whether it was black tungsten filament or white tungsten filament,the larger the diameter,the greater the breaking force,and the breaking strength of the tungsten filament was much larger than the breaking strength of the steel wire.The larger the diameter of the tungsten filament,the slower the degradation rate.During the two months,the mass loss rate of the thick black tungsten filament was 59.40%,thin black tungsten filament was 83.88%,thick white tungsten filament was 47.39%,thin white tungsten filament was 72.29%,the degradation rate of thick tungsten wire was nearly half of the thin,and degradation mainly occured in the first months.

零价铁还原土壤中邻硝基甲苯的研究

在常温常压下,利用零价铁(ZVI,Fe0)还原技术修复被邻硝基甲苯(ONT)污染的土壤,研究不同反应时间零价铁对ONT的去除率。实验结果表明,随着反应时间的延长土壤中ONT的含量逐渐降低,到达一定的时间后就达到平衡状态。当土壤中的ONT的初始浓度约为750μg/g,零价铁加入量是0.5 g,土壤含水量为75%,土壤初始pH值6.8,于25℃反应9 h,ONT的还原率可达67%。