摘要
目的针对中药含油水体所造成的膜污染模型,选择适当的膜清洗方法和膜清洗剂。方法采用多种化学清洗剂对超滤处理中药含油水体过程中被污染的超滤膜进行清洗,以纯水通量的恢复系数r评估清洗效果。结果对于本体系所污染的PES膜(截留分子量3万)和PVDF膜(截留分子量7万):较佳方案均为0.1 mol/L HCl 0.5 h+0.2%NaOH0.5 h:50%EtOH 0.5 h;自配清洗剂0.5 h。结论先酸后碱洗和自配的清洗剂清洗效果满意,适合中药含油水体膜分离过程中污染膜的清洗。
OBJECTIVE To look for suitable membrane cleaning method and cleaning agents for membrane models polluted with oily water. METHOD Multiple chemical cleaning agents were used to clean the ultrafiltration membrane polluted during the processing of oily water in Chinese drugs. The coefficient for pure water flux （7） was used to evaluate the effect of the cleaning. RESULT The optimal method for cleaning the polluted PES membrane （ with molecular cut-off of thirty thousand） and PVDF membrane （ with molecular cut-off of seventy thousand） was 0.1 mol/L HCl 0.5 h ＋ 0.2% NaOH 0.5; 50% EtOH 0.5 h; self-prepared cleaning agent 0.5 h. CONCLUSION Cleaning with acid followed by alkali and with self- prepared cleaning agent have satisfactory results, which can be used to clean the polluted membrane in the separation of oily water membrane in Chinese drugs.
出处
《南京中医药大学学报》
CAS
CSCD
2008年第3期165-167,217,218,共5页
Journal of Nanjing University of Traditional Chinese Medicine
基金
国家科技部"十一五"支撑课题(2006BAI09B07-03)
关键词
超滤膜
油水分离
膜清洗
ultratiltration membrane
separation of oil and water
membrane cleaning agent
