Abstract:

In the domain of chemical separation, the pursuit of straightforward and expeditious treatment of multicomponent industrial wastewater has emerged as a prominent trend. However, traditional methods have demonstrated low separation efficiency when dealing with emulsified phosphorus-containing wastewater. In this study, a cellulose membrane was used as the base matrix, and La(OH)? nanoparticles were in-situ grown on it to construct a composite membrane capable of simultaneous phosphorus removal and demulsification. Structural characterization revealed that La（OH）? was uniformly anchored on the fiber surface. The membrane's underwater superoleophobicity and low oil adhesion enabled it to separate various oil-in-water emulsions with an efficiency of 99.2% and a separation flux of 1 210 L/（m2?h）. The membrane exhibited sustained high phosphorus removal and demulsification performance even after ten cycles, providing a scalable and sustainable new approach for the next generation of multicomponent industrial wastewater treatment.

Key words: La（OH）?, Cellulose, Phosphorus adsorption, Emulsion demulsification, Synchronous separation

摘要：

在化工分离领域，开发能简便、快速地处理多组分工业废水的技术已成为显著发展趋势。然而，传统方法在应对乳化含磷废水时暴露出分离效率低下的问题。以纤维素膜为基底，原位生长La（OH）?纳米颗粒，构建可同步实现除磷和截留磷的复合膜，并对其进行了性能测试。结果表明，La（OH）?均匀锚定在纤维表面；水下超疏油与低油的黏附特性使其能分离各类油水乳液，达到99.2%的分离效率和1 210 L/（m2·h）的渗透通量；膜材料循环10次后仍保持较高的除磷及截留磷的性能。研究结果为下一代多组分工业废水的处理提供了易于规模化放大、可持续的新思路。

关键词: La（OH）?, 纤维素, 磷吸附, 乳液截留, 同步分离