title: Behavior of Ag nanoparticles in soil: effects of particle surface coating, aging and sewage sludge amendment.
abstract: This study addressed the relative importance of particle coating, sewage sludge amendment, and aging on aggregation and dissolution of manufactured Ag nanoparticles (Ag MNPs) in soil pore water. Ag MNPs with citrate (CIT) or polyvinylpyrrolidone (PVP) coatings were incubated with soil or municipal sewage sludge which was then amended to soil (1% or 3% sludge (w/w)). Pore waters were extracted after 1 week and 2 and 6 months and analyzed for chemical speciation, aggregation state and dissolution. Ag MNP coating had profound effects on aggregation state and partitioning to pore water in the absence of sewage sludge, but pre-incubation with sewage sludge negated these effects. This suggests that Ag MNP coating does not need to be taken into account to understand fate of AgMNPs applied to soil through biosolids amendment. Aging of soil also had profound effects that depended on Ag MNP coating and sludge amendment.
authors.affiliation: University of Kentucky, Department of Plant and Soil Sciences, Lexington, KY 40546, United States; Center for the Environmental Implications of Nanotechnology, Duke University, Durham, NC 27708, United States.
authors.forename: Annie R
authors.initials: AR
authors.lastname: Whitley
authors.forename: Clément
authors.initials: C
authors.lastname: Levard
authors.forename: Emily
authors.initials: E
authors.lastname: Oostveen
authors.forename: Paul M
authors.initials: PM
authors.lastname: Bertsch
authors.forename: Chris J
authors.initials: CJ
authors.lastname: Matocha
authors.forename: Frank
authors.initials: F
authors.lastname: von der Kammer
authors.forename: Jason M
authors.initials: JM
authors.lastname: Unrine
mesh_terms: D052918:Environmental Restoration and Remediation / Q000379:methods*; D053768:Metal Nanoparticles / Q000032:analysis / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*; D012834:Silver / Q000032:analysis / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*; D014865:Waste Disposal, Fluid
chemical_list: D012722:Sewage; D012987:Soil; D012989:Soil Pollutants; D012834:Silver
keywords: Agriculture; Biosolids; Detection; Nanotechnology; Weathering