The thermal degradation of Poly (phenylene sulfide sulfone) (PPSS) was studied by thermogravimetric analysis in both nitrogen and air to determine the thermal lifetime.
采用热分析的方法对高性能材料聚苯硫醚砜(PPSS)在氮气气氛和空气气氛中的热老化寿命进行了研究。
2
From the investigations, lack of nitrogen and phosphorus, oxygen deficiency in aeration basin of SBR, high concentration of sulfide in the wastewater is found.
调查分析得知该厂印染废水存在氮、磷缺乏现象，SBR曝气池存在缺氧现象，废水中硫化物含量较高。
3
The contents of organic matters, heavy metals, nitrogen, phosphorus, sulfide, et al. in Marine areas are becoming higher, which enhance the pollution of sediment environment.