吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (2): 573-579.doi: 10.13278/j.cnki.jjuese.201702206

• 地质工程与环境工程 • 上一篇    下一篇

酪氨酸酶固定化碳材料对苯酚的生物降解性能

刘娜1, 梁刚1, 董新维1, 祁小丽1, 杨悦锁1,2, 叶康1, 朴云仙1   

  1. 1. 地下水资源与环境教育部重点实验室/吉林大学环境与资源学院, 长春 130021;
    2. 沈阳大学区域污染环境生态修复教育部重点实验室, 沈阳 110044
  • 收稿日期:2016-06-30 出版日期:2017-03-26 发布日期:2017-03-26
  • 通讯作者: 朴云仙(1979-),女,副教授,主要从事纳米生物催化环境修复、环境监测、生物传感器方面的研究,E-mail:yxpiao@jlu.edu.cn E-mail:yxpiao@jlu.edu.cn
  • 作者简介:刘娜(1977-),女,教授,博士生导师,主要从事环境生物技术方面的研究,E-mail:liuna@jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目（41472237）；吉林省科技厅自然科学基金项目（20150101094JC）

Biodegradation Property of Phenol Using the Immobilized Tyrosinase on Carbon Material

Liu Na1, Liang Gang1, Dong Xinwei1, Qi Xiaoli1, Yang Yuesuo1,2, Ye Kang1, Piao Yunxian1   

  1. 1. Key Laboratory of Groundwater Resources and Environment of the Ministry of Education/College of Environment and Resources, Jilin University, Changchun 130021, China;
    2. Key Lab of Eco-Restoration of Regional Contaminated Environment, Shenyang University, Ministry of Education, Shenyang 110044, China
  • Received:2016-06-30 Online:2017-03-26 Published:2017-03-26
  • Supported by:
    Supported by the National Natural Science Foundation of China (41472237) and the Natural Science Foundation from the Department of Science & Technology of Jilin Province (20150101094JC)

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摘要： 以新型碳材料氧化石墨烯作为载体，利用共价结合方法制备酪氨酸酶固定化氧化石墨烯复合物，并利用该复合物对苯酚进行催化降解，探讨酶的加载特性和酶的催化活性，以及固定化酪氨酸酶催化降解苯酚的最优条件及储存稳定性。通过对固定化酪氨酸酶进行活性和固定量分析后认为：单位质量载体的酶固定量为1.78 mg/mg，单位质量载体的酶活性为1 880.6 U/mg；固定化酪氨酸酶在30 h内对47.06 mg/L苯酚的降解率可达86.3%，降解反应的最优条件为pH=7.0、温度=25℃；固定化酪氨酸酶在4℃条件下30 d后仍保持初始活性的77.7%，其稳定性优于游离酪氨酸酶。另外，在氧化石墨烯上引入磁颗粒，既简化了酶固定流程，又能做到回收利用。

关键词: 氧化石墨烯, 酪氨酸酶, 苯酚, 生物降解, 固定化

Abstract: Graphene oxide, a novel carbon material, was employed as the supporting material for the immobilization of tyrosinase enzymes with covalent bonding method. Loading dosage, enzyme activity, optimal conditions for phenol degradation and storage stability of the immobilized tyrosinase were investigated. Loading yield and enzyme activity of immobilized tyrosinase could reach 1.78 mg/mg support and 1 880.6 U/mg support, respectively. The phenol degradation efficiency by immobilized tyrosinase was 86.3% in 30 h reaction and the optimal conditions of phenol degradation were at pH 7.0 and 25℃. Comparing with the free tyrosinase, the immobilized tyrosinase had better storage stability by retaining 77.7% of initial activity for at least 30 days when stored at 4℃. With the introduced magnetic particles in the surface of graphene oxide, the process of enzyme immobilization could be simplified and it is helpful for reuse.

Key words: graphene oxide, tyrosinase, phenol, biodegradation, immobilization

中图分类号: 

  • X506
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