Abstract
Abstract Ferruginous deposits from the outfall and backfill of a newly‐installed drainage scheme in a poorly drained alluvial soil have been characterised using selective chemical dissolution, X‐ray diffraction, and chemical analysis and compared with the iron (Fe) deposits found in various micro‐environments within the soil profile. In the drainage ditch and on the permeable backfill around the drainage pipes, the mineralogy of the ferruginous deposits is dominated by the poorly ordered mineral, ferrihydrite, whereas within the soil environment the hydrous iron oxides display a wider range of structural order. It is probable that the initial precipitation product is poorly‐ordered material but that within the soil transformation to a more well ordered mineral, goethite, can occur.
Published Version
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