Abiotic selenium redox transformations in the presence of Fe(II,III) oxides

Satish Chandra Babu Myneni, T. K. Tokunaga, G. E. Brown

Research output: Contribution to journalArticle

289 Scopus citations

Abstract

Many suboxic sediments and soils contain an Fe(II, III) oxide called green rust. Spectroscopic evidence showed that selenium reduces from an oxidation state of +VI to 0 in the presence of green rust at rates comparable with those found in sediments. Selenium speciation was different in solid and aqueous phases. These redox reactions represent an abiotic pathway for selenium cycling in natural environments, which has previously been considered to be mediated principally by microorganisms. Similar green rust- mediated abiotic redox reactions are likely to be involved in the mobility of several other trace elements and contaminants in the environment.

Original languageEnglish (US)
Pages (from-to)1106-1109
Number of pages4
JournalScience
Volume278
Issue number5340
DOIs
StatePublished - Nov 7 1997

All Science Journal Classification (ASJC) codes

  • General

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