Abstract

Methods to study the retention of manufactured nanoparticles (MNP) are lacking for soils that are likely to be increasingly exposed to MNP. In this study we present, for the first time, a method to determine retention values (K(r)) of Ag and CeO(2) MNP, that can be ranked among solid-liquid partitioning (K(d)) values of bulk (micrometre-sized) forms, soluble salts and other possible contaminants of soils. After method optimisation, suspensions containing 1.24 mg kg(-1) Ag as Ag MNP and 1.30 mg kg(-1) Ce as CeO(2) MNP were added to five soils. More than 7% of Ag MNP occurred as soluble Ag(I) after 24 h and the range of K(r) values of Ag MNP (77-2165 L kg(-1)) and CeO(2) MNP(1.1-2828 L kg(-1)) contrasted with K(d) values of soluble Ag(I), Ce(III) and Ce(IV) salts and bulk Ag and CeO(2) powders in different soils.

Keywords

K(d); K(r); partitioning; risk assessment; transport

Published in

Environmental Chemistry
2010, Volume: 7, number: 3, pages: 298-308
Publisher: CSIRO PUBLISHING

UKÄ Subject classification

Soil Science


Publication identifier

DOI: https://doi.org/10.1071/EN10013

Permanent link to this page (URI)

https://res.slu.se/id/publ/80954