高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (9): 1999.doi: 10.7503/cjcu20140059

• 物理化学 • 上一篇    下一篇

静电纺丝制备中空纤维原位固定化碳酸酐酶用于二氧化碳的吸收

崔建东1,2, 李莹1,2, 姬晓元2, 边红杰1, 张羽飞2, 苏志国2, 马光辉2, 张松平2   

  1. 1. 河北科技大学生物科学与工程学院, 石家庄 050018
    2. 中国科学院过程工程研究所, 生化工程国家重点实验室, 北京 100190
  • 收稿日期:2014-01-17 出版日期:2014-09-10 发布日期:2019-08-01
  • 作者简介:联系人简介: 张松平, 女, 博士, 研究员, 主要从事生物化工研究. E-mail: spzhang@ipe.ac.cn
  • 基金资助:
    基金项目: 国家自然科学基金(批准号: 21376249, 21106164, 21072041)和国家“九七三”计划项目(批准号: 2013CB733604)资助

Bio-sequestration of CO2 Using Carbonic Anhydrase in situ Encapsulated Inside Electrospun Hollow Fibers

CUI Jiandong1,2, LI Ying1,2, JI Xiaoyuan2, BIAN Hongjie1, ZHANG Yufei2, SU Zhiguo2, MA Guanghui2, ZHANG Songping2,*   

  1. 1. College of Bioscience and Bioengineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
    2. National Key Laboratory of Biochemical Engineering, Institute of Process Engineering,Chinese Academy of Sciences, Beijing 100190, China
  • Received:2014-01-17 Online:2014-09-10 Published:2019-08-01
  • Contact: ZHANG Songping
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.21376249, 21106164, 21072041) and the National Basic Research Program of China(No.2013CB733604)

摘要:

考察了游离碳酸酐酶吸收CO2水合体系反应条件, 并通过同轴共纺静电纺丝技术制备出中空结构纤维, 实现了碳酸酐酶在中空纤维中的原位包埋, 提高了酶的稳定性并便于回收和重复利用. 实验结果表明, 固定化碳酸酐酶的热稳定性显著增强, 受Cu2+和Fe3+等金属离子的抑制作用大幅度降低. 连续使用11次后所生成的CaCO3沉淀量仍能达到首次使用的81.9%. 固定化酶体系生成的CaCO3沉淀包括方解石型和球文石型2种晶形, 而无酶和加入游离碳酸酐酶的反应体系则主要生成方解石型CaCO3沉淀.

关键词: 碳酸酐酶, CO2吸收, 中空纤维, 静电纺丝, 碳酸钙

Abstract:

Carbonic anhydrase catalyzed bio-sequestration of CO2 to form HCO3-, followed by trapping as solid CaCO3 is one of the most promising technologies for CO2 capturing. The effects of reaction condition on the CO2 hydration using free carbonic anhydrase were systematically investigated. In order to improve the stability of the enzyme and facility its recycling, the carbonic anhydrase was in situ encapsulated inside hollow fibers via a novel co-axial electrospinning technology. Compared with the free enzyme, the immobilized carbonic anhydrase showed much improved thermal stability and suffered much reduced inhibitory effects from cation ions, such as Cu2+ and Fe3+. After 11 reuses, the immobilized enzyme retained about 81.9% of its original activity by comparing the amount of formed CaCO3 precipitation. In the presence of immobilized carbonic anhydrase, both calcite and vaterite CaCO3 solid were formed; while in the absence of enzyme or with free carbonic anhydrase, only calcite CaCO3 was observed.

Key words: Carbonic anhydrase, CO2 Sequestration, Hollow fiber, Electrospinning, CaCO3

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