Show simple item record

dc.contributor.authorFrierdich, A.J.
dc.contributor.authorSaxey, David
dc.contributor.authorAdineh, V.R.
dc.contributor.authorFougerouse, Denis
dc.contributor.authorReddy, Steven
dc.contributor.authorRickard, William
dc.contributor.authorSadek, A.Z.
dc.contributor.authorSouthall, S.C.
dc.date.accessioned2020-05-21T03:30:03Z
dc.date.available2020-05-21T03:30:03Z
dc.date.issued2019
dc.identifier.citationFrierdich, A.J. and Saxey, D.W. and Adineh, V.R. and Fougerouse, D. and Reddy, S.M. and Rickard, W.D.A. and Sadek, A.Z. et al. 2019. Direct Observation of Nanoparticulate Goethite Recrystallization by Atom Probe Analysis of Isotopic Tracers. Environmental Science and Technology. 53 (22): pp. 13126-13135.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/79365
dc.identifier.doi10.1021/acs.est.9b04191
dc.description.abstract

© 2019 American Chemical Society. Goethite (α-FeOOH) is dispersed throughout the earth's surface, and its propensity to recrystallize in aqueous solutions determines whether this mineral is a source or sink for critical trace elements in the environment. Under reducing conditions, goethite commonly coexists with aqueous Fe(II) (Fe(II)aq), which accelerates recrystallization by coupled electron transfer and atom exchange. Quantifying the amount of the mineral phase that exchanges its structural Fe(III) atoms with Fe(II)aq is complicated by recrystallization models with untested assumptions of whether, and to what extent, the recrystallized portion of the mineral continues to interact with the solution. Here, we reacted nanoparticulate goethite with 57Fe-enriched Fe(II)aq and used atom probe tomography (APT) to resolve the three-dimensional distribution of Fe isotopes in goethite at the sub nm scale. We found that the 57Fe tracer isotope is enriched in the bulk structure (tens of nanometers deep), with some samples having 57Fe penetration throughout at a level that is similar to the isotopic composition of Fe(II)aq. This suggests that some particles undergo near-complete recrystallization. In other cases, however, the distribution of 57Fe is more heterogeneous and generally concentrates near the particle periphery. Nanoparticle encapsulation and subsequent APT can hence capture hidden recrystallization mechanisms which are critical to predicting mineral reactivity in aqueous solutions.

dc.languageEnglish
dc.publisherAMER CHEMICAL SOC
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/DE190101307
dc.subjectScience & Technology
dc.subjectTechnology
dc.subjectLife Sciences & Biomedicine
dc.subjectEngineering, Environmental
dc.subjectEnvironmental Sciences
dc.subjectEngineering
dc.subjectEnvironmental Sciences & Ecology
dc.subjectAQUEOUS FE(II)
dc.subjectLOW-TEMPERATURE
dc.subjectALPHA-FEOOH
dc.subjectEXCHANGE
dc.subjectMN
dc.subjectFE
dc.subjectNI
dc.subjectBARITE
dc.subjectFRACTIONATION
dc.subjectSPECIATION
dc.titleDirect Observation of Nanoparticulate Goethite Recrystallization by Atom Probe Analysis of Isotopic Tracers
dc.typeJournal Article
dcterms.source.volume53
dcterms.source.number22
dcterms.source.startPage13126
dcterms.source.endPage13135
dcterms.source.issn0013-936X
dcterms.source.titleEnvironmental Science and Technology
dc.date.updated2020-05-21T03:29:59Z
curtin.departmentJohn de Laeter Centre (JdLC)
curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.accessStatusFulltext not available
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidRickard, William [0000-0002-8118-730X]
curtin.contributor.orcidSaxey, David [0000-0001-7433-946X]
curtin.contributor.orcidReddy, Steven [0000-0002-4726-5714]
curtin.contributor.researcheridRickard, William [E-9963-2013]
curtin.contributor.researcheridSaxey, David [H-5782-2014]
curtin.contributor.researcheridReddy, Steven [A-9149-2008]
dcterms.source.eissn1520-5851
curtin.contributor.scopusauthoridFougerouse, Denis [56418452200]
curtin.contributor.scopusauthoridRickard, William [35171231700]
curtin.contributor.scopusauthoridSaxey, David [15059256300]
curtin.contributor.scopusauthoridReddy, Steven [7402263354]


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record