Redox zones of a landfill leachate pollution plume (Vejen, Denmark)

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Abstract

Downgradient from an old municipal landfill allowing leachate, rich in dissolved organic carbon, to enter a shallow sandy aerobic aquifer, a sequence of redoxe zones is identified from groundwater chemical analysis. Below the landfill, methanogenic conditions prevail, followed by sulfidogenic, ferrogenic, nitrate-reducing and aerobic environments overa distance of 370 m. This redox zone sequence is consistent with thermodynamical principles and is closely matched by the leachate plume determined by the chloride plume distribution. The redox zone sequence is believed to be key in controlling the fate of reactive pollutants leached from the landfill.
Original languageEnglish
JournalJournal of Contaminant Hydrology
Volume10
Issue number4
Pages (from-to)273-289
ISSN0169-7722
Publication statusPublished - 1992

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