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Inactivation and Magnetic Separation of Bacteria from Liquid Suspensions Using Electrosprayed and Nonelectrosprayed nZVI Particles: Observations and Mechanisms
Chen, Qi; Gao, Min; Li, Jing; Shen, Fangxia; Wu, Yan; Xu, Zhenqiang; Yao, Maosheng
2012
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume46Issue:4Pages:2360-2367
AbstractHere, nonelectrosprayed nanoscale zerovalent iron (NE-nZVI), electrosprayed nZVI (E-nZVI) and preoxidized nZVI (o-nZVI) particles were applied to inactivating Bacillus subtilis, Escherichia coli as well as bacteria in various wastewater samples. In addition, magnetic separation was applied to the mixture of 0.2 mL bacterial sample and 1.8 mL E-nZVI or NE-nZVI suspensions. Bacterial concentrations and optical density of the supernatants were analyzed using culturing, optical adsorption and qPCR tests. In general, for wastewater samples the inactivations were shown to range from nog to 3-log. PCR-DGGE analysis indicated that no gene mutation occurred when bacteria were treated with nZVI. Using magnetic separation, significant physical removals, revealed as a function of nZVI type (NE-,E- and O-nZVI) and bacterial concentration, up to 6-log were obtained. E-nZVI and NE-nZVI were shown to react differently with B. subtilis and E. coil, although exhibiting similar inactivation rates, qPCR tests detected higher amount of DNA in the supernatants from mixing E. coil with NE-nZVI, but less for E-nZVI. However, the opposite was observed with B. subtilis. Our data together with optical adsorption analysis suggested that the inactivation and magnetic separation mainly depend on Fe-0/Fe3O4 shell compositions, the type of bacteria (aerobic and anaerobic) and their concentrations.
Department水污染控制技术研究室
Citation statistics
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/7936
Collection水污染控制实验室
Recommended Citation
GB/T 7714
Chen, Qi,Gao, Min,Li, Jing,et al. Inactivation and Magnetic Separation of Bacteria from Liquid Suspensions Using Electrosprayed and Nonelectrosprayed nZVI Particles: Observations and Mechanisms[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2012,46(4):2360-2367.
APA Chen, Qi.,Gao, Min.,Li, Jing.,Shen, Fangxia.,Wu, Yan.,...&Yao, Maosheng.(2012).Inactivation and Magnetic Separation of Bacteria from Liquid Suspensions Using Electrosprayed and Nonelectrosprayed nZVI Particles: Observations and Mechanisms.ENVIRONMENTAL SCIENCE & TECHNOLOGY,46(4),2360-2367.
MLA Chen, Qi,et al."Inactivation and Magnetic Separation of Bacteria from Liquid Suspensions Using Electrosprayed and Nonelectrosprayed nZVI Particles: Observations and Mechanisms".ENVIRONMENTAL SCIENCE & TECHNOLOGY 46.4(2012):2360-2367.
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