CORE
🇺🇦
make metadata, not war
Services
Services overview
Explore all CORE services
Access to raw data
API
Dataset
FastSync
Content discovery
Recommender
Discovery
OAI identifiers
OAI Resolver
Managing content
Dashboard
Bespoke contracts
Consultancy services
Support us
Support us
Membership
Sponsorship
Community governance
Advisory Board
Board of supporters
Research network
About
About us
Our mission
Team
Blog
FAQs
Contact us
Fe(II)-catalyzed recrystallization of goethite revisited
Authors
Andrew J. Frierdich
Anke Neumann
+81 more
Beard B. L.
Beard B. L.
Beard B. L.
Boily J. F.
Borch T.
Boyanov M. I.
Brian L. Beard
Brown G. E.
Buchholz A.
Burleson D. J.
Casey W. H.
Chatman S.
Chatman S.
Chongmin Wang
Clark M. Johnson
Criss R. E.
Crosby H. A.
Crosby H. A.
Cutting R. S.
Cwiertny D. M.
Drew E. Latta
Elsner M.
Fakih M.
Fortune W. B.
Frederickson J. K.
Frierdich A. J.
Frierdich A. J.
Frierdich A. J.
Frierdich A. J.
Frierdich A. J.
Gorski C. A.
Gorski C. A.
Graham C. M.
Gregory K. B.
Gualtieri A. F.
Guilbaud R.
Guilbaud R.
Handler R. M.
Hansel C. M.
Hansel C. M.
Hiemstra T.
Jang J. H.
Jang J. H.
Jeon B.-H.
Jickells T.
Jones A. M.
Kenneke J. F.
Kerisit S.
Kevin M. Rosso
Kosmulski M.
Latta D. E.
Latta D. E.
Li W.
Lovley D. R.
Masue-Slowey Y.
Michelle M. Scherer
Mikutta C.
Nealson K. H.
Neumann A.
Northrop D. A.
Pedersen H. D.
Peretyazhko T.
Postma D.
Robert M. Handler
Roden E. E.
Rohsenow W.
Smedley P. L.
Stoffregen R.
Stumm W.
Tai Y. L.
Tamaura Y.
Tamura H.
Timothy Pasakarnis
W. A. P. J. Premaratne
Wu L.
Wu L.
Wu L.
Wu L.
Yang L.
Yanina S. V.
Zarzycki P.
Publication date
7 October 2014
Publisher
'American Chemical Society (ACS)'
Doi
Cite
Abstract
© 2014 American Chemical Society. Results from enriched 57Fe isotope tracer experiments have shown that atom exchange can occur between structural Fe in Fe(III) oxides and aqueous Fe(II) with no formation of secondary minerals or change in particle size or shape. Here we derive a mass balance model to quantify the extent of Fe atom exchange between goethite and aqueous Fe(II) that accounts for different Fe pool sizes. We use this model to reinterpret our previous work and to quantify the influence of particle size and pH on extent of goethite exchange with aqueous Fe(II). Consistent with our previous interpretation, substantial exchange of goethite occurred at pH 7.5 (≈ 90%) and we observed little effect of particle size between nanogoethite (average size of 81 × 11 nm; ≈ 110 m2/g) and microgoethite (average size of 590 × 42 nm; ≈ 40 m2/g). Despite ≈90% of the bulk goethite exchanging at pH 7.5, we found no change in mineral phase, average particle size, crystallinity, or reactivity after reaction with aqueous Fe(II). At a lower pH of 5.0, no net sorption of Fe(II) was observed and significantly less exchange occurred accounting for less than the estimated proportion of surface Fe atoms in the particles. Particle size appears to influence the amount of exchange at pH 5.0 and we suggest that aggregation and surface area may play a role. Results from sequential chemical extractions indicate that 57Fe accumulates in extracted Fe(III) goethite components. Isotopic compositions of the extracts indicate that a gradient of 57Fe develops within the goethite with more accumulation of 57Fe occurring in the more easily extracted Fe(III) that may be nearer to the surface
Similar works
Full text
Available Versions
Crossref
See this paper in CORE
Go to the repository landing page
Download from data provider
info:doi/10.1021%2Fes503084u
Last time updated on 04/09/2020
Michigan Technological University
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:digitalcommons.mtu.edu:mic...
Last time updated on 25/11/2020