通过双组分辅助界面聚合提高纳滤膜对矿物离子和全氟烷基和多氟烷基物质的选择性

IF 12.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2025-07-28 DOI:10.1016/j.watres.2025.124315

Chunlin Zhai , Kunpeng Zhang , Yanling Liu , Shengji Xia

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引用次数: 0

摘要

具有定制孔径的高负电荷纳滤膜可以有效地过滤痕量的全氟烷基和多氟烷基物质（PFAS），同时允许有益的矿物离子通过，使其成为高级饮用水净化的理想选择。本研究提出了一种新的双组分辅助界面聚合（IP）策略，旨在提高PFAS与矿物离子之间的膜选择性。对苯二胺作为水共聚单体和1,3,5-三甲酰间苯三酚作为预负载有机相的逐步参与适当地调整了聚酰胺层形成的IP动力学。与采用单一组分或混合有机相的方法相比，该策略取得了更优异的效果，制备出结构更疏松、负电荷密度更高、厚度更薄、亲水性增强的高性能膜。最佳膜具有20.4 L m−2 h−1 bar−1的高透水性，对6种PFAS （300-514 Da）的拒绝率超过88%，在处理实际自来水时，Ca2+/PFAS的选择性超过37，超过许多商业和先前开发的膜。此外，该新型膜具有良好的长期稳定性，并提高了对有机污染和石膏结垢的抵抗力。这项研究提出了一种有前途的纳滤解决方案，用于饮用水处理，需要有效去除痕量PFAS和高保存矿物离子。

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Enhancing selectivity of nanofiltration membranes for mineral ions and per- and polyfluoroalkyl substances via dual-component-assisted interfacial polymerization

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Enhancing selectivity of nanofiltration membranes for mineral ions and per- and polyfluoroalkyl substances via dual-component-assisted interfacial polymerization

Highly negatively charged nanofiltration membranes with tailored pore sizes can effectively reject trace per- and polyfluoroalkyl substances (PFAS) while allowing the passage of beneficial mineral ions, making them ideal for advanced drinking water purification. This study proposed a novel dual-component-assisted interfacial polymerization (IP) strategy aiming at enhancing membrane selectivity between PFAS and mineral ions. The step-wise involvement of p-Phenylenediamine as the aqueous co-monomer and 1,3,5-triformyl phloroglucinol as the pre-loading organic phase properly tailored the IP kinetics for polyamide layer formation. This strategy achieved superior effect compared to others adopting single component or mixed organic phase, yielding high-performance membranes characterized by looser structures, higher negative charge density, thinner thickness, and enhanced hydrophilicity. The optimal membrane demonstrated a high water permeance of 20.4 L m⁻² h⁻¹ bar⁻¹, over 88 % rejections for six kinds of PFAS (300–514 Da), and a Ca²⁺/PFAS selectivity exceeding 37 when treating practical tap water, surpassing numerous commercial and previously developed membranes. Furthermore, the novel membrane exhibited excellent long-term stability and improved resistance to organic fouling and gypsum scaling. This study presents a promising solution of nanofiltration for drinking water treatment requiring efficient removal of trace PFAS and high preservation of mineral ions.

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来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.