化工学报 ›› 2025, Vol. 76 ›› Issue (12): 6423-6438.DOI: 10.11949/0438-1157.20250844

• 分离工程 • 上一篇    下一篇

磷酸糖与高浓度磷酸盐的高效纳滤分离

毛正鑫1,2(), 申佳昌1,2, 刘梦鑫3, 季延洁3, 王钦宏4, 杨茂华1(), 邢建民1,2()   

  1. 1.中国科学院过程工程研究所绿色过程与工程重点实验室,北京 100190
    2.中国科学院大学化学工程学院,北京 100049
    3.天津君诺生物技术有限公司,天津 300308
    4.中国科学院天津工业生物技术研究所低碳合成工程生物学全国重点实验室,天津 300308
  • 收稿日期:2025-07-29 修回日期:2025-10-23 出版日期:2025-12-31 发布日期:2026-01-23
  • 通讯作者: 杨茂华,邢建民
  • 作者简介:毛正鑫(1995—), 男, 博士研究生, maozhengxin@ipe.ac.cn

Efficient separation of phosphorylated sugars and high-concentration phosphate by nanofiltration

Zhengxin MAO1,2(), Jiachang SHEN1,2, Mengxin LIU3, Yanjie JI3, Qinhong WANG4, Maohua YANG1(), Jianmin XING1,2()   

  1. 1.CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
    2.College of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
    3.Tianjin Juno Biotechnology Company, Tianjin 300308, China
    4.CAS Key Laboratory of Low Carbon Synthetic Engineering Biology, Tianjin Institute of Industrial Biotechnology, Tianjin 300308, China
  • Received:2025-07-29 Revised:2025-10-23 Online:2025-12-31 Published:2026-01-23
  • Contact: Maohua YANG, Jianmin XING

摘要:

磷酸糖是重要的生化药物与糖类合成关键中间体。在多酶催化制备糖类物质时,伴随着磷酸糖的生成,磷酸盐(Pi)的浓度逐渐升高,高浓度Pi对酶活性具有抑制作用。因此,Pi的高效去除是实现糖类物质合成技术推广应用的关键。本研究针对磷酸糖/Pi模拟体系,考察了Pi总浓度、pH和溶液组成对分离效率的影响。对比分析了多种纳滤膜,结果表明,在高盐浓度下,纳滤膜NF4和NF7展现出良好的分离选择性能,可以实现磷酸糖与高浓度磷酸盐的高效分离。通过洗滤,Pi的去除率可达到80%以上。采用了DSPM-DE模型对分离机制进行解析,空间位阻和介电排斥是实现溶质分离的关键机制。本研究利用纳滤技术实现了高盐体系中磷酸糖与Pi的高效分离,同时解决了高盐环境对催化体系中酶活性的潜在抑制作用,确保了体系的长期稳定运行,为磷酸糖制备技术的工业应用奠定了基础。

关键词: 膜, 纳滤, 高盐溶液, 磷酸糖, 磷酸盐去除, 分离, 介电排斥

Abstract:

Phosphorylated sugars are important biopharmaceuticals and key intermediates in carbohydrate synthesis. In multi-enzyme catalytic preparation systems for sugars, the continuous generation of phosphorylated sugars will result in the accumulation of inorganic phosphate (Pi). Since high concentrations of Pi inhibit enzyme activity, the efficient removal of Pi is critical for the implementation of carbohydrate synthesis technology. However, the separation of phosphorylated sugars/Pi presents a significant difficulty due to their highly similar physicochemical properties. This study investigated the separation efficiency of phosphorylated sugars/Pi in a simulated solution, specifically examining the influence of total concentration, pH and solution composition. Comparative analysis of multiple nanofiltration membranes revealed that NF4 and NF7 exhibit superior separation selectivity under high-salinity conditions. Through rinsing, the removal rate of Pi reached over 80%. This performance robustly confirmed the feasibility of separating phosphorylated sugars from Pi in high-salt solutions. Furthermore, the separation mechanism was analyzed using the Donnan Steric Pore Model with Dielectric Exclusion (DSPM-DE). The analysis revealed that steric hindrance and dielectric exclusion are the key mechanisms underpinning the selective separation of these two solutes under high-salt conditions. This study successfully demonstrated efficient separation of phosphorylated sugars from Pi in high-salt systems by nanofiltration. The approach simultaneously mitigates potential enzyme inhibition in catalytic systems caused by high salinity, enabling long-term stable operation. These findings lay the groundwork for industrial implementation of phosphorylated sugars production technology.

Key words: membranes, nanofiltration, high salinity solution, phosphorylated sugar, phosphate removal, separation, dielectric exclusion

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