In-situ growth of MOF-based composites on nylon membrane for effective phosphate removal

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering Pub Date : 2023-06-01 DOI:10.1016/j.jece.2023.109864

Tian Chen, Hualun Li, Jing Jiang, Zhenda Lu

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引用次数: 0

Abstract

A membrane adsorbent has been rationally designed to simplify the solid-liquid separation process and avoid adsorbent loss and leakage. The iron-based MOF was grown in situ on the surface of nylon membrane substrates by layer-by-layer method, and the as-synthesized MIL@nylon was post-treated with sodium borohydride to generate iron oxide nanoparticles within the MOF, named HFO@MIL@nylon. SEM, XRD, FT-IR and XPS characterization confirmed successful loading of MOF and the generation of nanoparticles in the MOF. The adsorption properties of HFO@MIL@nylon were tested. The results show that the adsorption process of phosphate accords with Langmuir and quasi-second-order kinetic model, with an adsorption capacity of 63.3 mg/g based on the mass of HFO@MIL. HFO@MIL@nylon could maintain high performance in a wide pH range. And the common interference ions SO42-, NO3-, Cl- only extended minus effect on the removal which means HFO@MIL@nylon has a good selectivity towards phosphorus. In addition, HFO@MIL@nylon membrane could work as a filter membrane, purifying 550 mL water of 200 μg-P/L with a water permeance of 1054 L/m2 h MPa.

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mof基复合材料在尼龙膜上的原位生长及其对磷酸盐的有效去除

合理设计了膜吸附剂，简化了固液分离过程，避免了吸附剂的损失和泄漏。采用逐层法在尼龙膜衬底表面原位生长铁基MOF，并将合成的MIL@nylon用硼氢化钠后处理，在MOF内生成氧化铁纳米颗粒，命名为HFO@MIL@nylon。SEM, XRD, FT-IR和XPS表征证实了MOF的成功加载和纳米颗粒的生成。测试了HFO@MIL@尼龙的吸附性能。结果表明:磷的吸附过程符合Langmuir准二级动力学模型，基于HFO@MIL质量的吸附容量为63.3 mg/g;HFO@MIL@尼龙可以在较宽的pH范围内保持高性能。常见的干扰离子SO42-、NO3-、Cl-对除磷有延伸负作用，说明HFO@MIL@尼龙对磷具有良好的选择性。此外，HFO@MIL@尼龙膜可作为过滤膜，净化200 μg-P/L的550 mL水，透水率为1054 L/m2 h MPa。

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来源期刊

Journal of Environmental Chemical Engineering Environmental Science-Pollution

CiteScore

11.40

自引率

6.50%

发文量

2017

审稿时长

27 days

期刊介绍： The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.