Enhanced removal of organic micropollutants using 2D metal-organic framework interlayered nanofiltration membrane

IF 11.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2025-05-18 DOI:10.1016/j.watres.2025.123852

Ruiying Li, Lingyue Zhang, Shuang Zheng, Wenyu Liu, Li Long, Chuyang Tang

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Abstract

Organic micropollutants (OMPs) present considerable threats to both human health and the environment. Traditional thin film composite (TFC) nanofiltration (NF) polyamide membranes, despite their high water permeance and salt rejection capabilities, often fail to effectively remove OMPs. This study addresses this limitation by incorporating two-dimensional (2D) zinc(II) tetrakis(4-carboxy-phenyl)porphyrin (Zn-TCPP) metal-organic framework (MOF) nanosheets as interlayers in TFC membranes (TFNi), using a polyethylene glycol (PEG) assisted exfoliation technique to mitigate issues of nanosheet restacking and aggregation. The uniformly distributed MOF interlayers significantly improved pure water permeance from 10.6 to 32.1 L m⁻² h⁻¹ bar⁻¹ while maintaining a high rejection of 97.0% towards Na₂SO₄. Moreover, the optimized membrane showed significant improvements in OMP removal, attributed to the increased negative charge and greater hydrophilicity of the polyamide rejection layer. These findings highlight the potential of 2D MOF nanosheets as interlayers in developing high-performance membranes for effective OMP removal and water reuse.

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二维金属-有机框架层间纳滤膜对有机微污染物的强化去除

有机微污染物对人类健康和环境构成相当大的威胁。传统的薄膜复合（TFC）纳滤（NF）聚酰胺膜尽管具有高透水性和防盐能力，但往往不能有效去除omp。本研究通过将二维（2D）锌（II）四基（4-羧基苯基）卟啉（Zn-TCPP）金属有机框架（MOF）纳米片作为TFC膜（TFNi）的中间层来解决这一限制，并使用聚乙二醇（PEG）辅助剥离技术来减轻纳米片的重新堆积和聚集问题。均匀分布的MOF中间层显著地提高了纯水的渗透率，从10.6升到32.1升（⁻²h⁻¹巴），同时保持了97.0%的对Na₂SO₄的拒绝率。此外，优化后的膜在去除OMP方面表现出显著的改善，这是由于聚酰胺截除层的负电荷增加和亲水性增强。这些发现突出了二维MOF纳米片作为中间层在开发高性能膜以有效去除OMP和水回用方面的潜力。

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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.