PVDF-DCOIT复合中空纤维膜制备与抗污染性能研究  

Preparation and antifouling performance study of PVDF-DCOIT composite hollow fiber membrane

作　　者：曹宏杰 乔森[1] 周集体[1] CAO Hongjie;QIAO Sen;ZHOU Jiti(Key Laboratory of Industrial Ecology and Environmental Engineering,Ministry of Education,School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学环境学院工业生态与环境工程教育部重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2020年第2期111-118,共8页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(21677026);中央高校基本科研业务费专项资金资助项目(DUT17LAB15);高等学校学科创新引智计划资助项目(B13012).

摘　　要：将有机杀菌剂4,5-二氯-N-辛基-4-异噻唑啉-3-酮(DCOIT)以适当浓度物理共混于聚偏氟乙烯(PVDF)中来制备一种新型的抗污染膜.实验表明,DCOIT含量为3%的PVDF-DCOIT复合中空纤维膜具有最佳性能.相比PVDF膜,PVDF-DCOIT复合中空纤维膜亲水性和纯水通量分别提升了22.9%和64.6%.SEM、EDS和AFM表征分析也反映出更好的表面形貌和更加光滑的膜表面,这些因素都有利于膜污染的缓解.在抗污染实验中,添加DCOIT后牛血清白蛋白、海藻酸钠和腐殖酸对膜表面的污染降低了26%、120%和74%;而在厌氧污泥中PVDF-DCOIT复合中空纤维膜的通量恢复效率也提高了39%.Organic biocide 4,5-dichloro-N-octyl-4-isothiazolin-3-one(DCOIT) is physically blended with polyvinylidene fluoride(PVDF) in proper concentration to explore the preparation of novel antifouling membrane. The experimental results show that the PVDF-DCOIT composite hollow fiber membrane with 3% DCOIT has the optimum comprehensive performance. Compared with PVDF membrane, the hydrophilicity and pure water flux of the PVDF-DCOIT composite hollow fiber membranes are improved by 22.9% and 64.6%, respectively. The characteristics of SEM, EDS and AFM also show that the PVDF-DCOIT composite hollow fiber membranes have better morphologies and smoother surface, which are beneficial to the alleviation of membrane fouling. In the antifouling experiments, the membrane fouling quantities of PVDF-DCOIT composite hollow fiber membranes in bovine serum albumin(BSA), sodium alginate(SA) and humic acid(HA) are reduced by 26%, 120% and 74%. Moreover, the flux recovery efficiency of PVDF-DCOIT composite hollow fiber membranes in anaerobic sludges is also increased by 39%.

关 键 词：膜生物反应器 PVDF-DCOIT复合中空纤维膜 4 5-二氯-N-辛基-4-异噻唑啉-3-酮(DCOIT) 抗污染性能 

分 类 号：X703.1[环境科学与工程—环境工程]