Fe2+ sorption at the Fe oxide-water interface: A revised conceptual framework

Christopher A. Gorski, Michelle M. Scherer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

61 Scopus citations

Abstract

Sorption of aqueous Fe2+ at the Fe oxide-water interface has traditionally been viewed in the classic framework of sorption at static oxide surface sites as formulated in surface complexation models (SCMs). Significant experimental and theoretical evidence has accumulated, however, to indicate that the reaction of aqueous Fe2+ with Fe3+ oxides is much more complex and is comprised of sorption, electron transfer, conduction, dissolution, and, in some cases, atom exchange and/or transformation to secondary minerals. Here, we provide a brief historical review of Fe 2+ sorption on Fe oxides and present a revised conceptual model based on the semiconducting properties of Fe oxides that incorporates recent experimental evidence for Fe2+-Feoxide3+ electron transfer, bulk electron conduction, and Fe atom exchange. We also discuss the implications of this revised conceptual model for important environmental processes, such as trace metal cycling and contaminant fate.

Original languageEnglish (US)
Title of host publicationAquatic Redox Chemistry
PublisherAmerican Chemical Society
Pages315-343
Number of pages29
ISBN (Print)9780841226524
DOIs
StatePublished - Jan 1 2011

Publication series

NameACS Symposium Series
Volume1071
ISSN (Print)0097-6156
ISSN (Electronic)1947-5918

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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