An efficient magnetically modified microbial cell biocomposite for carbazole biodegradation.
An efficient magnetically modified microbial cell biocomposite for carbazole biodegradation.
复制标题
用于咔唑生物降解的高效磁改性微生物细胞生物复合材料
DOI：
10.1186/1556-276x-8-522
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发表时间：
2013-12-11
影响因子：
--
通讯作者：
Xu P
中科院分区：
文献类型：
--
作者：
Li Y;Du X;Wu C;Liu X;Wang X;Xu P
Magnetic modification of microbial cells enables to prepare smart biocomposites in bioremediation. In this study, we constructed an efficient biocomposite by assembling Fe3O4nanoparticles onto the surface ofSphingomonassp. XLDN2-5 cells. The average particle size of Fe3O4nanoparticles was about 20 nm with 45.5 emu g-1saturation magnetization. The morphology ofSphingomonassp. XLDN2-5 cells before and after Fe3O4nanoparticle loading was verified by scanning electron microscopy and transmission electronic microscopy. Compared with free cells, the microbial cell/Fe3O4biocomposite had the same biodegradation activity but exhibited remarkable reusability. The degradation activity of the microbial cell/Fe3O4biocomposite increased gradually during recycling processes. Additionally, the microbial cell/Fe3O4biocomposite could be easily separated and recycled by an external magnetic field due to the super-paramagnetic properties of Fe3O4nanoparticle coating. These results indicated that magnetically modified microbial cells provide a promising technique for improving biocatalysts used in the biodegradation of hazardous compounds.
