Chemical condition for the appearance of a negative Ce anomaly in stream waters and groundwaters

Mayumi Seto, Tasuku Akagi

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Nine publications showing REE data in groundwaters and river water were examined to understand the general condition of terrestrial water where a negative Ce anomaly develops. It was found that the negative Ce anomaly only appeared when Fe, Mn and dissolved organic carbon (DOC) concentrations were low (Fe and Mn <5 × 10-5 mol/L and DOC < 10 mg/L). Assuming that Ce3+ and Fe2+ concentrations were limited by the formation of cerianite and ferrihydrite, respective redox potential (Eh) was calculated from each of Ce3+ and Fe2+ concentrations. For data sets displaying Ce anomalies, the calculated Ehs (cEhs) showed a 1:1 relationship between Ce and Fe. This relationship indicates that the absolute concentration of Ce in natural water may be thermodynamically determined in situ by Eh and pH when concentrations of Fe, Mn and DOC are poor.

Original languageEnglish
Pages (from-to)371-380
Number of pages10
JournalGEOCHEMICAL JOURNAL
Volume42
Issue number4
DOIs
Publication statusPublished - Jan 1 2008

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ground water
Organic carbon
dissolved organic carbon
Groundwater
anomalies
anomaly
groundwater
Water
water
carbon
ferrihydrite
redox potential
river water
rare earth element
Rivers
rivers
low concentrations
chemical

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

Chemical condition for the appearance of a negative Ce anomaly in stream waters and groundwaters. / Seto, Mayumi; Akagi, Tasuku.

In: GEOCHEMICAL JOURNAL, Vol. 42, No. 4, 01.01.2008, p. 371-380.

Research output: Contribution to journalArticle

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