Behavior of Ag nanoparticles in soil: Effects of particle surface coating, aging and sewage sludge amendment

Annie R. Whitley, Clément Levard, Emily Oostveen, Paul M. Bertsch, Chris J. Matocha, Frank Von Der Kammer, Jason M. Unrine

Research output: Contribution to journalArticlepeer-review

126 Scopus citations

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.

Original languageEnglish
Pages (from-to)141-149
Number of pages9
JournalEnvironmental Pollution
Volume182
DOIs
StatePublished - 2013

Bibliographical note

Funding Information:
This research was supported by the United States Environmental Protection Agency (U.S. EPA) and National Science Foundation (NSF) through cooperative agreements CR-83515701 (Office of Research and Development) and EF-0830093 (Center for Environmental Implications of Nanotechnology) and through the EPA Science to Achieve Results (STAR) program (RD-83485701 and RD-83457401 ). It has not been formally reviewed by EPA or NSF. The views expressed in this document are solely those of the authors. EPA and NSF do not endorse any products or commercial services mentioned in this publication. The authors also wish to acknowledge the assistance of J. Ye, S. Hunyadi, S. Marinakos, M. Vandiviere, A. Gondikas and J. Nelson. Portions of this research were carried out at the Stanford Synchrotron Radiation Lightsource, a directorate of SLAC National Accelerator Laboratory and an Office of Science User Facility operated for the U.S. Department of Energy Office of Science by Stanford University.

Keywords

  • Agriculture
  • Biosolids
  • Detection
  • Nanotechnology
  • Weathering

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

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