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The Impact of Silver Nanoparticles on the Composting of Municipal Solid Waste
Link to Journal Abstract
The study evaluates the impact of polyvinylpyrrolidone (PVP) coated silver nanoparticles (PVP-AgNPs) on the composting of municipal solid waste. The results suggest that there was no statistically significant difference in the leachate, gas, and solid quality parameters and overall composting performance between the treatments containing the AgNPs, Ag+, and negative control. Nonetheless, taxonomical analyses of 25 Illumina 16S rDNA barcoded libraries containing 2 393 504 sequences indicated that the bacterial communities in composted samples were highly diverse and primarily dominated by Clostridia (48.5%), Bacilli (27.9%), and beta-Proteobacteria (13.4%). Bacterial diversity studies showed that the overall bacterial community structure in the composters changed in response to the Ag-based treatments. However, the data suggest that functional performance was not significantly affected due to potential bacterial functional redundancy within the compost samples. The data also indicate that while the surface transformation of AgNPs to AgCl and Ag2S can reduce the toxicity, complexation with organic matter may also play a major role. The results of this study further suggest that at relatively low concentrations, the organically rich waste management systemsí functionality may not be influenced by the presence of AgNPs.
This study evaluates the impact of polyvinylpyrrolidone (PVP) coated silver nanoparticles (PVP-AgNPs) on the composting of municipal solid waste. Treatments of the waste contained AgNPs, Ag+, and negative control and measured the leachate, gas, and solid quality parameters and overall composting performance.
Peer Reviewed Journal Article
Exposure Or Hazard Target
Method Of Study
Environmental Fate and Transport
Risk Exposure Group
Environmental Science & Technology, 2013, Article ASAP, DOI: 10.1021/es402510a
Environmental Science & Technology
Gitipour A, El Badawy A, Arambewela M, Miller B, Scheckel K, Elk M, Ryu H, Gomez-Alvarez V, Domingo JS, Thiel S, Tolaymat T
Last updated on December 11, 2013
This work is supported in part by the Nanoscale Science and Engineering Initiative of the National Science Foundation
under NSF Award Number EEC-0118007.
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