摘要：本文主要研究油水乳液污染纳米凹凸棒石改性氧化铝微滤膜的化学清洗方法。考察了清洗剂种类、清洗剂浓度及清洗时间等清洗手段对于膜清洗效果的影响。通过通量恢复率、SEM和FT-IR等分析手段表征各种化学清洗剂对改性陶瓷膜的清洗效果。结果表明：化学清洗剂中氢氧化钠溶液对油水乳液污染的改性陶瓷微滤膜的清洗效果最好。先后在0。02mol/LNaOH和0。02mol/L的盐酸循环清洗40min后膜纯水通量恢复率最大可达93。6%，有效去除污染物。SEM和FT-IR分析手段表明化学清洗剂在清洗过程不会对膜表面产生破坏，不会影响凹凸棒石对氧化铝微滤膜的改性效果。91517

毕业论文关键词：改性陶瓷微滤膜，纳米凹凸棒石，油水乳液，膜污染，化学清洗

Abstract：In this paper, the chemical cleaning method of nanometer attapulgite (ATP) modified Al2O3 microfiltration membrane polluted by oily wastewater was studied。 The effects of cleaning agent type, cleaning agent concentration and cleaning time were investigated to obtain the best cleaning  method。  The  cleaning  effect  of  various  chemical  cleaning  means  on  the modified ceramic microfiltration membrane was characterized by flux recovery rate, SEM and FT-IR。 The results showed that sodium hydroxide solution performs best in cleaning the modified ceramic microfiltration membrane which is polluted by emulsified oily wastewater。 The recovery rate of membrane water flux was 93。6% after treated by 0。02 min / L NaOH and 0。02 mol / L hydrochloric acid for 40 min, and the pollutants were effectively removed。 SEM and FT-IR analysis showed that the chemical cleaning agent did not destroy the membrane surface during the cleaning process and would not affect the modification effect of ATP modified Al2O3 microfiltration membrane。源G于J优L尔V论N文M网WwW.youeRw.com 原文+QQ75201`8766

Keywords ： Modified ceramic microfiltration membrane, ATP, Emulsified oily wastewater, Membrane pollution, Chemical cleaning

目 录

1 引言 3

1。1 膜分离技术 3

1。1。1 膜分离技术简介 3

1。1。2 膜分离技术分类 3

1。1。3 膜改性技术 3

1。1。4 微滤膜 3

1。1。5 膜在含油废水处理中的应用 4

1。2 膜污染 4

1。2。1 膜污染的定义 4

1。2。2 膜污染的机理 5

1。2。3 膜污染分类 5

1。2。4 膜污染的影响因素 6

1。3 膜清洗 7

1。3。1 常见膜清洗的方法 7

1。3。2 化学清洗剂一般清洗规律 8

1。3。3 膜清洗的要求