Preparation of High Flux and Antifouling PDA/PEI Nanoparticle Membrane for Oil-Bearing Rural Domestic Wastewater Treatment
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摘要: 水处理分离膜具有纳米尺度筛分孔道,虽适合分散式处理农村生活污水中油水乳化液,但膜污染严重,导致膜通量较低. 因此,设计抗污染、高通量水处理分离膜可实现农村含油生活污水高效处理. 本文采用真空辅助自组装技术,在高分子膜表面及内部负载聚多巴胺(PDA)/聚乙烯亚胺(PEI)纳米颗粒,制备了PDA-NP膜. 由于纳米颗粒含有丰富的亲水基团,改性后膜纯水通量及农村含油生活污水通量恢复率分别高达(741.23±17) L/(m2·h)及99.4%,实现了高通量、抗污染目标;另外,对农村含油生活污水TOC的去除率达45.12%,具有较强的实际意义.
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关键词:
- 聚多巴胺 (PDA) /
- 纳米颗粒 /
- 抗污染 /
- 高通量 /
- 农村含油生活污水
Abstract: Water treatment separation membrane has nano-scale screening channels, which is suitable for decentralized treatment of oil-water emulsion in rural domestic sewage, but the membrane fouling is serious and energy consumption is high. Therefore, the design of anti-fouling and high flux water treatment separation membrane can achieve efficient treatment of oil-bearing domestic sewage in rural areas. In this study, PDA-NP films were prepared by vacuum-assisted self-assembly technology, and polydopamine (PDA)/polyethylene imine (PEI) nanoparticles were loaded on the surface and inside of polymer films. Because the nanoparticles contain rich hydrophilic groups, the recovery rate of pure water flux and rural oil-bearing domestic sewage flux is as high as (741.23±17) L/(m2·h) and 99.4%, respectively after modification, achieving the goals of high flux and anti-fouling. In addition, TOC removal rate of oil-bearing rural domestic sewage reached 45.12%, which has strong practical significance.-
Key words:
- polydopamine (PDA) /
- nanoparticle /
- antifouling /
- high flux /
- oil-bearing rural domestic wastewater
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表 1 改性方法制备的油水分离膜汇总
Table 1. Summary of the oil/water separation membrane through modification methods
膜类型 样品类别 压力/bar 水通量/[(L/(m2·h)] 截留率/% 数据来源 PDA-NP膜 油水乳液 0.1 741.23±17 99.2 该研究 RGO/PDA/g-C3N4 油水乳液 1 ~30 99.5 文献[29] ZNG-g-PVDF 油水乳液 0.1 2500 99.8 文献[30] Dopamine-KH550 and r/>TiO2 modified PVDF 油水乳液 0.9 785 ~99 文献[27] NiCo-LDH/PVDF composite 油水乳液 0.2 800 99.5 文献[28] mussel-inspired PVDF 油水乳液 0.4 896.52 ~99 文献[31] polydopamine-modified XLE RO 油水乳液 10.3 ~47 99.9 文献[32] SiO2-d-PK 油水乳液 1 6300 99.9 文献[33] PVDF/VTES/VP 油水乳液 1 19902±809 <99.9 文献[34] PAN 油水乳液 1 2270 85 文献[35] -
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