IL/GO/PVP/PVDF改性膜处理重金属离子的研究  

IL/GO/PVP/PVDF modified membrane for treatment of heavy metal ions

作　　者：房平 杜明山 李岩 姬伟 王琪 崔舒榕 FANG Ping;DU Ming-Shan;LI Yan;JI Wei;WANG Qi;CUI Shu-Rong(School of Urban Planning and Municipal Engineering,Xi'an Polytechnic University,Xi'an 710048,China;Oil and Gas Technology Research Institute,PetroChina Changqing Oilfield Company,Xi'an 710055,China)

机构地区：[1]西安工程大学城市规划与市政工程学院,陕西西安710048 [2]长庆油田分公司油气工艺研究所,陕西西安710055

出　　处：《现代化工》2022年第3期154-158,共5页Modern Chemical Industry

基　　金：陕西省重点研发计划项目(2021-NY188)。

摘　　要：将离子液体(IL)1-乙基-3-甲基咪[石坐]六氟磷酸盐([EMIM]PF_(6))、氧化石墨烯(GO)、聚乙烯吡咯烷酮K30(PVP)、聚偏氟乙烯(PVDF)、二甲基甲酰胺(DMF)共混制备IL/GO/PVP/PVDF改性超滤膜。以IL/GO复合添加剂为变量,测试了膜对Cd^(2+)、Pb^(2+)、Hg^(2+)3种重金属离子的截留率和抗污染率,并探究了离子浓度和pH对膜截留性能的影响。结果表明,IL/GO的添加降低了超滤膜接触角,有效提高了膜表面的亲水性。当IL/GO复合添加剂质量分数为4%/0.6%时膜的综合性能最佳,对Cd^(2+)、Pb^(2+)、Hg^(2+)的截留率可达96.31%、97.72%、96.47%,受污染后通量恢复率为79.24%、85.70%、82.28%。IL/GO/PVP/PVDF modified ultrafiltration membrane is obtained by blending ionic liquid(IL)1-ethyl-3-methyl imipene hexafluorophosphate([EMIM]PF_(6)),graphene oxide(GO),polyvinylpyrrolidone K30(PVP),polyvinylidene fluoride(PVDF)and dimethylformamide(DMF).With IL/GO compound additive as a variable,the membrane's rejection rate and anti-fouling rate to Cd^(2+),Pb^(2+) and Hg^(2+) are tested,and the influence of ion concentration and pH on the rejection performance of membrane is explored.The results identify that the addition of IL/GO reduces the contact angle of the ultrafiltration membrane and effectively improves the hydrophilicity of the membrane surface.When the content of IL/GO composite additive is 4%/0.6%,the overall performance of the membrane is the best,by which the rejection rates of Cd^(2+),Pb^(2+) and Hg^(2+) can reach 96.31%,97.72%and 96.47%,respectively and the flux recovery rates after pollution are 79.24%,85.70%and 82.28%,respectively.

关 键 词：离子液体 氧化石墨烯 聚偏氟乙烯 重金属离子 截留性能 

分 类 号：TQ051.893[化学工程] X703[环境科学与工程—环境工程]