华侨大学学报（自然科学版）2016，Vol.37Issue(6)：720-724,5.DOI:10.11830/ISSN.1000-5013.201606012
磁性微球的改性及其固定化铁还原菌的性能
Modification of Magnetic Microspheres and Its Performance of Immonilized Iron Reducing Bacteria
摘要
Abstract
Anstract: The modifiers of oleic acid,polyethylene glycol,sodiumcitrate and 3-ammonia propyl triethoxy si-lane (APTES)were applied to modify the Fe3 O4 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 deter-mine the optimal preparation conditions.The results showed that the Fe(Ⅲ)EDTA reduction rate of the iron-reducing bacterium immobilized on the APTES-Fe3 O4 microspheres was higher than that of the other micro-spheres.The optimal preparation conditions for the APTES-Fe3 O4 microspheres were determined as follows:8 mL of APTES,and 1 .5 g magnetic microspheres for immobilization of 1 mg iron-reducing bacteria.More im-portantly,the reduction efficiency still maintained 90%of its initial reduction ability after the 5th reused cycle.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Key words
magnetic microsphere/modify/3-ammonia propyl triethoxy silane/iron reducing bacteria/immo-bilized分类
化学化工引用本文复制引用
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):720-724,5.基金项目
国家自然科学基金资助项目 （）
