磺甲基化聚砜超滤膜的制备及在脱毛废液中的应用

Preparation of sulfomethyl polysulfone ultrafiltration membrane and its application to the treatment of unhairing waste liquid

以羟甲基磺酸钠为磺化剂,对聚砜超滤膜进行磺甲基化亲水化改性,最佳改性配比为n(HOCH2SO3Na)∶n(PSF)=1.5∶1,pH=8.0;在0.085 MPa、25℃下将改性聚砜超滤膜和聚砜膜分别用于工业脱毛废水的分离处理,并对比了废液处理前后的COD、灰分、硫化物、悬浮物、pH和色度等。结果表明,改性膜处理后废水的色度、悬浮物都得到有效去除,对废水中COD、硫化物的截留率分别达到了94%、71%以上。

Using hydroxymethyl sodium sulfonate as sulfonating agent,polysulfone ultrafiltration membrane has been modified by sulfomethylation and hydrophilization. The optimum modification mixture ratio is n（HOCH2SO3Na）： n （PSF） =1.5 ：1 ,and pH=8.0. When the operation conditions are 0.085 MPa,and temperature 25 ~C ,polysulfone uhrafihration membrane and polysulfone membrane are used respectively for the separation treatment of tannery un- hairing waste liquid. Its COD, ash content, sulfide, suspended matter, pH and chroma before and after the treatment are compared. The results show that after being treated with the modified membrane,the chroma and suspended solids of the wastewater are effectively removed. The intercepting rate of COD and sulfide in wastewater could be above 94% and 71%, respectively.