红茶汁超滤膜污染的化学清洗机理  

Chemical cleaning mechanism of ultra filter membrane for black tea draw-off juice

作　　者：赵晖[1] 黄国平[1] 卢安琪[1] 

机构地区：[1]南京水利科学研究院瑞迪高新技术公司,江苏南京210024

出　　处：《清洗世界》2005年第12期1-3,11,共4页Cleaning World

摘　　要：使用扫描电镜与能谱仪研究了使用多聚磷酸钠清洗被茶汁污染的无机膜在清洗前后膜表面状况以及表面的化学元素的变化,得出了多聚磷酸钠作为清洗剂的清洗机理。多聚磷酸钠清洗剂的清洗机理是它可以很好的络合吸附在膜表面的茶乳酪中的Ca2+,使污染物解体并且被清洗液带离膜表面,同时也说明Ca2+对于茶乳酪的形成起了一个重要的作用。The cleaning mechanism is important. The condition of membrane surface and the change of element after and before cleaning were determined by using SEM, EDS and IR. The cleaning mechanism of polyphosphate was studied. The IR can be applied to analyse the cleaning mechanism of sodium hypochlorite. The IR spectra show that sodium hypochlnrite oxidizes the hydroxyls of tea cream into kenetic linkage, however, the keantic hnkage materials would be absorbed again on the surface of membrane. As a result, the surface of membrane would be fouled also.

关 键 词：红茶 膜污染 化学清洗 机理 

分 类 号：TQ051.893[化学工程] X506[环境科学与工程—环境工程]