Issue 6, 2020

Nanoparticle affinity for natural soils: a functional assay for determining particle attachment efficiency in complex systems

Abstract

Few standardized methods and reference systems have been established for evaluating the behavior of engineered nanomaterials in complex media like natural soils. In this study, a working method for a functional assay to determine the affinity of nanoparticles (NPs) for soil surfaces by batch test is provided along with a case study demonstrating the utility of the method using a proposed reference soil (LUFA 2.2) and gold nanoparticles (AuNPs) with four different surface treatments (citrate [Cit], gum arabic [GA], polyvinylpyrrolidone [PVP], and branched polyethylenimine [bPEI]). Particle attachment efficiencies (α) of AuNPs with LUFA 2.2 soil spanned four orders of magnitude, with αbPEI-Au > αPVP-Au > αCit-AuαGA-Au, suggesting that GA-Au will be significantly more mobile in this soil than the other AuNPs. These results run counter to a widely held assumption that acquired macromolecular coatings in natural systems will likely mask engineered coatings and dictate NP mobility. Moreover, the trend in attachment efficiency could not be predicted based on differences in intrinsic or extrinsic NP properties alone, which supports the need for development and validation of well-controlled functional assays performed in complex media.

Graphical abstract: Nanoparticle affinity for natural soils: a functional assay for determining particle attachment efficiency in complex systems

Supplementary files

Article information

Article type
Paper
Submitted
06 1月 2020
Accepted
11 5月 2020
First published
13 5月 2020

Environ. Sci.: Nano, 2020,7, 1719-1729

Nanoparticle affinity for natural soils: a functional assay for determining particle attachment efficiency in complex systems

A. A. Turner, N. M. K. Rogers, N. K. Geitner and M. R. Wiesner, Environ. Sci.: Nano, 2020, 7, 1719 DOI: 10.1039/D0EN00019A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements