NDLI: Mitigation of nitrification inhibition by silver nanoparticles using cell entrapment technique

Content Provider	Springer Nature Link
Author	Siripattanakul Ratpukdi, Sumana Ploychankul, Chutima Limpiyakorn, Tawan Vangnai, Alisa S. Rongsayamant, Chaiwat Khan, Eakalak
Copyright Year	2014
Abstract	Effects of silver nanoparticles (AgNPs) on nitrification activities of free and entrapped nitrifying activated sludge (NAS) were investigated using a respirometric assay. Initial concentrations of ammonia and AgNPs, and entrapment materials and matrix sizes were the variables. Scanning and transmission electron microscopic analyses of the microbial cells and entrapment matrices were also performed. Results showed that AgNPs (0.05–5.00 mg/L) decreased nitrification activity down to only 2 % compared to the control (free NAS without AgNP exposure). Calcium alginate and polyvinyl alcohol-entrapped cells could mitigate inhibition of nitrification activity up to 100 % (no inhibition observed) and 88 % compared to the controls (entrapped NAS without AgNP exposure), respectively. Cells entrapped in a larger matrix size (both with and without AgNP exposure) performed nitrification better. Silver nanoparticles caused damages to cell membrane and cytoplasm, which likely led to a decrease of nitrification activity. The entrapment matrices successfully reduced the adverse effects of AgNPs on nitrification activity.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	16
Issue Number	2
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-01-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cell entrapment Cell physiology Nitrification Respirometry Silver nanoparticle Nanotechnology Inorganic Chemistry Characterization and Evaluation of Materials Physical Chemistry Optics, Optoelectronics, Plasmonics and Optical Devices
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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