生物可降解皂荚脂制备防污染松散聚酰胺纳滤膜用于模拟印染废水的精确分离

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-12-07 DOI:10.1002/jctb.7795

Xin-Xi Ding, Cheng Jiang, Mingguang Li, Xianghong Li, Dan-Dan Shao

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引用次数: 0

摘要

背景加强资源的回收利用对实现碳中和意义重大。纳滤膜利用特殊的孔径范围和表面电荷特性，具有纳米级的分离能力，在资源循环利用方面具有广阔的应用前景。工业纳滤膜主要采用界面聚合法制备，具有反应速度快、易放大等优点。然而，所得的聚酰胺纳滤膜具有致密的选择层，对分子的渗透和分离效率较低。本研究将可生物降解的表面活性剂槐油脂加入到水溶液中，以改善聚酰胺纳滤膜的性能。结果与传统纳滤膜相比，皂荚脂修饰纳滤膜的渗透率由3提高到18 L·m−2·h−1·bar−1。改性后的膜对大分子结构染料的去除率高，对小分子结构染料的去除率低。结论改性膜可对刚果红（分子量696.66 g/mol）与靛胭脂红（分子量407.98 g/mol）的混合染料溶液和刚果红/NaCl的混合溶液进行精确分离。此外，改性膜在长期稳定性试验中表现出良好的抗污染性能。本研究对印染废水资源化处理具有一定的研究意义。©2024化学工业学会（SCI）。

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Anti-fouling loose polyamide nanofiltration membrane preparation by biodegradable sophorolipids for precise separation of simulated dyeing wastewater

Background

Strengthening the recycling and utilization of resources is deeply significant in achieving carbon neutrality. The nanofiltration membranes possess separation ability within the nanoscale by utilizing special pore size ranges and surface charge properties, showing great application prospects in resource recycling. The commercial nanofiltration membranes are mainly prepared by interfacial polymerization with fast reaction speed and easy scaling-up advantages. However, the obtained polyamide nanofiltration membranes possess dense selective layers with low permeance and separation efficiency to the molecules. Herein, the biodegradable surfactant sophorolipid was added to the aqueous solution to improve the performance of the polyamide nanofiltration membranes.

Results

Compared with the traditional nanofiltration membranes, the permeance of the sophorolipid-modified nanofiltration membrane was improved from 3 to 18 L·m⁻²·h⁻¹·bar⁻¹. The modified membrane showed high rejection of the dyes with large molecular structures and low rejection of those with small molecular structures.

Conclusion

The modified membrane may separate the mixed dye solution of congo red (molecular weight 696.66 g/mol) and indigo carmine (molecular weight 407.98 g/mol) and the mixed congo red/NaCl solution precisely. Besides, the modified membrane showed good anti-fouling properties in the long-term stability test. This study may offer research significance for the resource treatment of printing and dyeing wastewater. © 2024 Society of Chemical Industry (SCI).

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.