[1]刘凡,周作明,荆国华.磁性微球的改性及其固定化铁还原菌的性能[J].华侨大学学报(自然科学版),2016,37(6):720-724.[doi:10.11830/ISSN.1000-5013.201606012]
　LIU Fan,ZHOU Zuoming,JING Guohua.Modification of Magnetic Microspheres and Its Performance ofImmobilized Iron Reducing Bacteria[J].Journal of Huaqiao University(Natural Science),2016,37(6):720-724.[doi:10.11830/ISSN.1000-5013.201606012]
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磁性微球的改性及其固定化铁还原菌的性能()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第37卷
期数:
2016年第6期
页码:
720-724
栏目:
出版日期:
2016-11-20

文章信息/Info

Title:
Modification of Magnetic Microspheres and Its Performance ofImmobilized Iron Reducing Bacteria
文章编号:
1000-5013(2016)06-0720-05
作者:
刘凡;  周作明;  荆国华
华侨大学 化工学院, 福建 厦门 361021
Author(s):
LIU Fan;  ZHOU Zuoming;  JING Guohua
College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
关键词:
磁性微球;  改性;  3-氨丙基三乙氧基硅烷;  铁还原菌;  固定化
Keywords:
magnetic microsphere;  modify;  3-ammonia propyl triethoxy silane;  iron reducing bacteria;  immobilized
分类号:
O647
DOI:
10.11830/ISSN.1000-5013.201606012
文献标志码:
A
摘要:
以油酸、聚乙二醇、柠檬酸钠和3-氨丙基三乙氧基硅烷(APTES)为改性剂,采用化学共沉淀法制备4种改性磁性微球.通过粒度测定(PSD)、X射线衍射分析(XRD)、傅里叶红外光谱分析(FTIR)、热重分析(TGA)、磁强度测定(VSM)对各种磁性微球进行表征,并对比各微球固定化铁还原菌后还原Fe(Ⅲ)EDTA的性能,最终确定最佳的磁性微球改性条件.结果表明:APTES改性的Fe3O4磁性微球固定化铁还原菌效果优于其他改性微球,其最佳条件为APTES投加量8 mL,1 mg铁还原菌需1.5 g磁性微球进行固定化;APTES-Fe3O4固定化铁还原菌后连续使用5次,其Fe(Ⅲ)EDTA还原效率仍可保持在90%以上.
Abstract:
The modifiers of oleic acid, polyethylene glycol, sodiumcitrate and 3-ammonia propyl triethoxy silane(APTES)were applied to modify the Fe3O4 magnetic microspheres by chemical co-precipitation method. The magnetic microspheres were characterized by PSD, XRD, FTIR, TGA and VSM, and reduction rates of Fe(Ⅲ)EDTA by different magnetic microsphere immobilized iron reducing bacteria were compared, to determine the optimal preparation conditions. The results showed that the Fe(Ⅲ)EDTA reduction rate of the iron-reducing bacterium immobilized on the APTES-Fe3O4 microspheres was higher than that of the other microspheres. The optimal preparation conditions for the APTES-Fe3O4 microspheres were determined as follows: 8 mL of APTES, and 1.5 g magnetic microspheres for immobilization of 1 mg iron-reducing bacteria. More importantly, the reduction efficiency still maintained 90% of its initial reduction ability after the 5th reused cycle.

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备注/Memo

备注/Memo:
收稿日期: 2015-10-10
通信作者: 荆国华(1975-),女,教授,博士,主要从事大气污染控制方向的研究.E-mail:zhoujing@hqu.edu.cn.
基金项目: 国家自然科学基金资助项目(21077035, NCET-11-0851)
更新日期/Last Update: 2016-11-20