Testing single extraction methods and in vitro tests to assess the geochemical reactivity and human bioaccessibility of silver in urban soils amended with silver nanoparticles

N. Cruz, S.M. Rodrigues*, D. Tavares, R.J.R. Monteiro, L. Carvalho, T. Trindade, A.C. Duarte, E. Pereira, Paul Romkens

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)

Abstract

To assess if the geochemical reactivity and human bioaccessibility of silver nanoparticles (AgNPs) in soils can be determined by routine soil tests commonly applied to other metals in soil, colloidal Ag was introduced to five pots containing urban soils (equivalent to 6.8mgAgkg-1 soil). Following a 45days stabilization period, the geochemical reactivity was determined by extraction using 0.43M and 2M HNO3. The bioaccessibility of AgNPs was evaluated using the Simplified Bioaccessibility Extraction Test (SBET) the "Unified BARGE Method" (UBM), and two simulated lung fluids (modified Gamble's solution (MGS) and artificial lysosomal fluid (ALF)).The amount of Ag extracted by 0.43M and 2M HNO3 soil tests was

Original languageEnglish
Pages (from-to)304-311
JournalChemosphere
Volume135
DOIs
Publication statusPublished - 2015

Keywords

  • Bioavailability
  • Engineered silver nanoparticles
  • Geochemical reactivity
  • In vitro bioaccessibility
  • Soil pollution

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