title: The impact of silver nanoparticles on the composting of municipal solid waste.
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 systems' functionality may not be influenced by the presence of AgNPs.
authors.affiliation: School of Energy, Environmental, Biological and Medical Engineering, University of Cincinnati , Cincinnati, Ohio.
authors.forename: Alireza
authors.initials: A
authors.lastname: Gitipour
authors.forename: Amro
authors.initials: A
authors.lastname: El Badawy
authors.forename: Mahendranath
authors.initials: M
authors.lastname: Arambewela
authors.forename: Bradley
authors.initials: B
authors.lastname: Miller
authors.forename: Kirk
authors.initials: K
authors.lastname: Scheckel
authors.forename: Michael
authors.initials: M
authors.lastname: Elk
authors.forename: Hodon
authors.initials: H
authors.lastname: Ryu
authors.forename: Vicente
authors.initials: V
authors.lastname: Gomez-Alvarez
authors.forename: Jorge
authors.initials: J
authors.lastname: Santo Domingo
authors.forename: Stephen
authors.initials: S
authors.lastname: Thiel
authors.forename: Thabet
authors.initials: T
authors.lastname: Tolaymat
mesh_terms: D001419:Bacteria / Q000145:classification; D044822:Biodiversity; D002947:Cities; D005740:Gases / Q000032:analysis; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D056951:Photoelectron Spectroscopy; D012834:Silver / Q000737:chemistry*; D012987:Soil; D062611:Solid Waste / Q000032:analysis*
chemical_list: D005740:Gases; D012987:Soil; D062611:Solid Waste; D012834:Silver