磷酸铝添加剂对聚偏氟乙烯膜抗污染性能的影响  

Effect of Aluminum Phosphate Additive on the Antifouling Properties of PVDF Membrane

作　　者：熊娟[1] 李玉婷 魏冲 毛学语 左行涛[2] XIONG Juan;LI Yuting;WEI Chong;MAO Xueyu;ZUO Xingtao(College of Science,Huazhong Agricultural University;College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,China)

机构地区：[1]华中农业大学理学院 [2]华中农业大学资源与环境学院,湖北武汉430070

出　　处：《水处理技术》2019年第8期86-88,98,共4页Technology of Water Treatment

基　　金：中央高校基本科研业务费专项基金（2662018JC013,2662017JC019）;湖北省自然科学基金面上项目（2016CFB495）;国家自然科学基金（11247304）

摘　　要：考察添加剂磷酸铝(AlPO4)对聚偏氟乙烯(PVDF)膜性能的影响,分析模拟污染物的过滤行为机制。结果表明,AlPO4对PVDF膜的孔隙率和含水率无明显影响。适量添加Al PO4使PVDF膜的水通量、通量恢复率增加,提升PVDF膜的抗污染能力。AlPO4添加质量分数为2.5%时,PVDF滤膜的整体性能较优:水通量为246.4 L/(m^2·h),通量衰减系数0.22,牛血清白蛋白截留率95%,通量恢复率66%。采用AlPO4的质量分数2.5%制备的PVDF膜,模拟污染物(牛血清白蛋白、海藻酸钠、腐殖酸及其混合液)的过滤机制主要为滤饼过滤-标准堵塞型。The effect of aluminum phosphate(AlPO4) addition on the properties of PVDF membrane was investigated, and the filtration behavior of simulated pollutants was also analyzed. The results showed that AlPO4 had no obvious effect on the porosity and water content of PVDF membrane.Optimal addition of AlPO4 into the membrane phase increased the water flux and flux recovery rate of PVDF membrane, and the antifouling ability of PVDF membrane also enhanced. At 2.5% of mass fraction of AlPO4, the PVDF membrane exhibited better performance. The water flux, flux attenuation coefficient, BSA retention rate and flux recovery ratio were 246.4 L/(m^2·h), 0.22, 95% and 66%, respectively. Using prepared PVDF membrane with 2.5%of mass fraction of AlPO4, the filtration mechanism of simulated pollutants(bovine serum albumin, sodium alginate, humic acid and their mixture) was cake filtration-standard blocking model.

关 键 词：聚偏氟乙烯膜 磷酸铝 水处理性能 污染机制 

分 类 号：TQ028.8[化学工程]