当前位置:
X-MOL 学术
›
J. Membr. Sci.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
用于去除萘普生的基于 CoFe2O4-过氧单硫酸盐的催化 UF 和 NF 聚合物膜:停留时间的作用
Journal of Membrane Science
(
IF
8.4
)
Pub Date : 2021-12-24
, DOI:
10.1016/j.memsci.2021.120209
Tao Wang
,
Wiebe M. de Vos
,
Joris de Grooth
微污染物对水质、水生生物和公众健康构成重大威胁。结合膜过滤和过硫酸盐 (PMS) 活化的催化聚合物膜为其处理提供了替代选择。在这项工作中,CoFe 2 O 4基催化颗粒与聚醚砜 (PES) 聚合物混合,并通过非溶剂诱导相转化制备催化 UF(超滤)膜。含 2.0% CoFe 2 O 4的催化超滤膜浓度可在批量实验中有效降解 70% 的萘普生。此外,通过在催化超滤膜表面逐层组装PDADMAC(聚(二烯丙基二甲基氯化铵))和PSS(聚(苯乙烯磺酸盐)),构建了一个稳定的选择性层。催化 UF 和 NF(纳滤)膜均在全循环模式和单程模式下进行测量。在全循环模式下,由于 PMS 的活化和吸附增加,催化 UF 和 NF 膜的萘普生截留率在添加 PMS 后均增加。萘普生在不同通量下的去除表明较长的停留时间(即较低的通量)可以有效地降低渗透物中的萘普生浓度。在单程模式中也观察到相同的停留时间效应。通过将超滤膜的停留时间延长至与纳滤膜相同的水平,催化超滤膜表现出 87.7% 的萘普生截留率,与纳滤膜相当。值得注意的是,超滤膜中使用的压力仅为 0.1 bar,显示出降低能源成本的巨大优势。这些结果揭示了停留时间对催化膜处理微污染物的效率的重要作用。此外,催化超滤膜在低压下的应用提供了一种去除微污染物的能源友好方式。这些结果揭示了停留时间对催化膜处理微污染物的效率的重要作用。此外,催化超滤膜在低压下的应用提供了一种去除微污染物的能源友好方式。这些结果揭示了停留时间对催化膜处理微污染物的效率的重要作用。此外,催化超滤膜在低压下的应用提供了一种去除微污染物的能源友好方式。
"点击查看英文标题和摘要"
CoFe2O4-peroxymonosulfate based catalytic UF and NF polymeric membranes for naproxen removal: The role of residence time
Micropollutants pose a significant threat to water quality, aquatic life, and public health. A catalytic polymeric membrane, combining membrane filtration and peroxymonosulfate (PMS) activation provides an alternative option to their treatment. In this work, CoFe2O4 based catalytic particles were blended with polyethersulfone (PES) polymer and catalytic UF (ultrafiltration) membranes were fabricated by non-solvent induced phase inversion. The catalytic UF membrane with 2.0% CoFe2O4 concentration can effectively degrade 70% naproxen in a batch experiment. Additionally, a stable selective layer was built by the layer-by-layer assembly of PDADMAC (poly(diallyldimethylammonium chloride)) and PSS (poly(styrenesulfonate)) on the surface of the catalytic UF membrane. Both the catalytic UF and NF (nanofiltration) membranes were measured in full-recycling mode and single-pass mode. In the full-recycling mode, the naproxen rejection of catalytic UF and NF membranes both increased after adding PMS due to the activation of PMS and increased adsorption. Naproxen removal at different fluxes indicates that longer residence time (i.e. lower flux) can effectively decrease the naproxen concentration in the permeate. The same effect of residence time was also observed in the single-pass mode. By prolonging the residence time of UF membranes to the same level of the NF membranes, the catalytic UF membrane exhibited 87.7% naproxen rejection which is comparable to that of the NF membranes. Significantly, the pressure used in the UF membrane was only 0.1 bar, showing a great advantage of reduced energy cost. These results reveal the important role of residence time on the treatment efficiency of micropollutants by catalytic membranes. Moreover, the application of catalytic UF membranes under low pressure provides an energy-friendly way of removing micropollutants.
更新日期:2021-12-24