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Degradation of nonylphenol polyethoxylates by functionalized Fe3O4 nanoparticle-immobilized Sphingomonas sp Y2

文献类型： 外文期刊

作者： Bai, Naling 1 ; Wang, Sheng 1 ; Sun, Pengfei 3 ; Abuduaini, Rexiding 1 ; Zhu, Xufen 4 ; Zhao, Yuhua 1 ;

作者机构： 1.Zhejiang Univ, Inst Microbiol, Coll Life Sci, Hangzhou 310058, Zhejiang, Peoples R China

2.Shanghai Acad Agr Sci, Ecoenvironm Protect Res Inst, Shanghai 201106, Peoples R China

3.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China

4.Zhejiang Univ, Inst Genet, Coll Life Sci, Hangzhou 310058, Zhejiang, Peoples R China

关键词： Nonylphenol polyethoxylate;Magnetic nanoparticles;Polydopamine;Immobilization;Biodegradation

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2018 年 615 卷

页码：

收录情况： SCI

摘要： In this study, the efficiency of the nonylphenol polyethoxylates (NPEOs)-degrading bacterium Sphingomonas sp. strain Y2 was evaluated, which was immobilized by a novel system composed of polydopamine (PD)-coated Fe3O4 iron nanoparticles (IONPs). The PD-IONPs, with a distinct core-shell structure, relatively uniform size, and high saturation magnetization, were prepared for Y2 immobilization. The performance of Y2 was unaffected by this novel immobilization method, exhibiting 79.5% and 99.9% of NPEOs (500 ppm) degradation efficiency at day 1 and 2, respectively. Furthermore, separation and recycling were more readily achieved for immobilized cells as compared to free cells. Immobilized cells retained over 70% of the original degradation activity after 6 cycles of utilization. These results suggest that Y2-PD-IONPs can be potentially used for NPEOs-contaminated wastewater bioremediation. Capsule: Immobilization of Sphingomonas sp. Y2 by functionalized PD-IONPs with easy separation, recycling utilization and high efficiency. (c) 2017 Elsevier B.V. All rights reserved.

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