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

Publication ,  Journal Article
Turner, AA; Rogers, NMK; Geitner, NK; Wiesner, MR
Published in: Environmental Science: Nano
June 1, 2020

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-Au ≫ αGA-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. This journal is

Duke Scholars

Published In

Environmental Science: Nano

DOI

EISSN

2051-8161

ISSN

2051-8153

Publication Date

June 1, 2020

Volume

7

Issue

6

Start / End Page

1719 / 1729

Related Subject Headings

  • 1002 Environmental Biotechnology
  • 0907 Environmental Engineering
  • 0399 Other Chemical Sciences
 

Citation

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Turner, A. A., Rogers, N. M. K., Geitner, N. K., & Wiesner, M. R. (2020). Nanoparticle affinity for natural soils: a functional assay for determining particle attachment efficiency in complex systems. Environmental Science: Nano, 7(6), 1719–1729. https://doi.org/10.1039/d0en00019a
Turner, A. A., N. M. K. Rogers, N. K. Geitner, and M. R. Wiesner. “Nanoparticle affinity for natural soils: a functional assay for determining particle attachment efficiency in complex systems.” Environmental Science: Nano 7, no. 6 (June 1, 2020): 1719–29. https://doi.org/10.1039/d0en00019a.
Turner AA, Rogers NMK, Geitner NK, Wiesner MR. Nanoparticle affinity for natural soils: a functional assay for determining particle attachment efficiency in complex systems. Environmental Science: Nano. 2020 Jun 1;7(6):1719–29.
Turner, A. A., et al. “Nanoparticle affinity for natural soils: a functional assay for determining particle attachment efficiency in complex systems.” Environmental Science: Nano, vol. 7, no. 6, June 2020, pp. 1719–29. Scopus, doi:10.1039/d0en00019a.
Turner AA, Rogers NMK, Geitner NK, Wiesner MR. Nanoparticle affinity for natural soils: a functional assay for determining particle attachment efficiency in complex systems. Environmental Science: Nano. 2020 Jun 1;7(6):1719–1729.
Journal cover image

Published In

Environmental Science: Nano

DOI

EISSN

2051-8161

ISSN

2051-8153

Publication Date

June 1, 2020

Volume

7

Issue

6

Start / End Page

1719 / 1729

Related Subject Headings

  • 1002 Environmental Biotechnology
  • 0907 Environmental Engineering
  • 0399 Other Chemical Sciences