US EPA

3502600 

Journal Article 

Enhanced biodegradation of di-n-butyl phthalate by Acinetobacter species strain LMB-5 coated with magnetic nanoparticles 

Wang, J; Jiang, L; Zhou, Y; Ye, BCe 

2017 

1 

International Biodeterioration & Biodegradation
ISSN: 0964-8305
EISSN: 1879-0208 

116 

184-190 

English 

10.1016/j.ibiod.2016.10.024 

WOS:000390498700022 

https://search.proquest.com/docview/2000223238?accountid=171501
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Phthalate acid esters (PAEs) are widely present in a
variety of consumer products and they pose a public health concern due to the high mobility and
hazards. In this study, we designed an immobilized method to eliminate phthalates by using
Fe3O4@NH2 nanoparticles (NPs). The surface-modified NPs showed a good dispersion property, and
the particle size was approximately 230 nm. The results showed that Acinetobacter sp. strain
LMB-5 could be coated by the prepared magnetic particles allowing easy separation from solution
by applying an external magnetic field. The coated cells possessed adaptability to a wide range
of pH and high tolerance towards toxic substances. More importantly, when the temperature was
elevated to 60 degrees C, the coated cells also exhibited remarkable degradability. There was no
change in the main metabolites during the biodegradation between the free cells and immobilized
ones through GC/MS analysis to detect the degradation intermediates. These results show that
immobilization method using magnetic nanoparticles is a promising way for degradation of
phthalates in application. (C) 2016 Elsevier Ltd. All rights reserved. 

Phthalate degradation; Acinetobacter species; Reusability; Magnetic separation; Nanoparticles