Size-Based Differential Transport, Uptake, and Mass Distribution of Ceria (CeO2) Nanoparticles in Wetland Mesocosms

Nicholas K. Geitner, Jane L. Cooper, Astrid Avellan, Benjamin T. Castellon, Brittany G. Perrotta, Nathan Bossa, Marie Simonin, Steven M. Anderson, Sayako Inoue, Michael F. Hochella, Curtis J. Richardson, Emily S. Bernhardt, Gregory V. Lowry, P. Lee Ferguson, Cole W. Matson, Ryan S. King, Jason M. Unrine, Mark R. Wiesner, Heileen Hsu-Kim

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Trace metals associated with nanoparticles are known to possess reactivities that are different from their larger-size counterparts. However, the relative importance of small relative to large particles for the overall distribution and biouptake of these metals is not as well studied in complex environmental systems. Here, we have examined differences in the long term fate and transport of ceria (CeO2) nanoparticles of two different sizes (3.8 vs 185 nm), dosed weekly to freshwater wetland mesocosms over 9 months. While the majority of CeO2 particles were detected in soils and sediments at the end of nine months, there were significant differences observed in fate, distribution, and transport mechanisms between the two materials. Small nanoparticles were removed from the water column primarily through heteroaggregation with suspended solids and plants, while large nanoparticles were removed primarily by sedimentation. A greater fraction of small particles remained in the upper floc layers of sediment relative to the large particles (31% vs 7%). Cerium from the small particles were also significantly more bioavailable to aquatic plants (2% vs 0.5%), snails (44 vs 2.6 ng), and insects (8 vs 0.07 μg). Small CeO2 particles were also significantly reduced from Ce(IV) to Ce(III), while aquatic sediments were a sink for untransformed large nanoparticles. These results demonstrate that trace metals originating from nanoscale materials have much greater potential than their larger counterparts to distribute throughout multiple compartments of a complex aquatic ecosystem and contribute to the overall bioavailable pool of the metal for biouptake and trophic transfer.

Original languageEnglish
Pages (from-to)9768-9776
Number of pages9
JournalEnvironmental Science and Technology
Volume52
Issue number17
DOIs
StatePublished - Sep 4 2018

Bibliographical note

Funding Information:
This material is based upon work supported by the National Science Foundation (NSF) and the Environmental Protection Agency (EPA) under NSF Cooperative Agreement EF-0830093 and DBI-1266252, Center for the Environmental Implications of NanoTechnology (CEINT). Any opinions, findings, conclusions, or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NSF r the EPA. This work has not been subjected to EPA review and no official endorsement should be inferred. A portion of this research was performed using resources of the Advanced Photon Source, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science by Argonne National Laboratory, and was supported by the U.S. DOE under Contract No. DE-AC02-06CH11357, and the Canadian Light Source and its funding partners. We thank Dale L Brewe at APS (BL 20-ID) for his support.

Funding Information:
This material is based upon work supported by the National Science Foundation (NSF) and the Environmental Protection Agency (EPA) under NSF Cooperative Agreement EF-0830093 and DBI-1266252, Center for the Environmental Implications of NanoTechnology (CEINT). Any opinions, findings, conclusions, or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NSF or the EPA. This work has not been subjected to EPA review and no official endorsement should be inferred. A portion of this research was performed using resources of the Advanced Photon Source, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science by Argonne National Laboratory, and was supported by the U.S. DOE under Contract No. DE-AC02-06CH11357, and the Canadian Light Source and its funding partners. We thank Dale L Brewe at APS (BL 20-ID) for his support.

Publisher Copyright:
© 2018 American Chemical Society.

ASJC Scopus subject areas

  • Chemistry (all)
  • Environmental Chemistry

Fingerprint

Dive into the research topics of 'Size-Based Differential Transport, Uptake, and Mass Distribution of Ceria (CeO2) Nanoparticles in Wetland Mesocosms'. Together they form a unique fingerprint.

Cite this