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    Author(s): Julian Deiss; Carl Byers; Dave Clover; Dave D'Amore; Alan Love; Malcolm A. Menzies; J. Powell; Todd M. Walter
    Date: 2004
    Source: Journal of Contaminant Hydrology. 74: 1-18
    Publication Series: Scientific Journal (JRNL)
    PDF: View PDF  (1.57 MB)

    Description

    A set of peat column experiments was used to determine the transport potential of lead (Pb) and diesel range organics (DRO) in palustrine slope wetlands near Juneau, AK. This project is important to southeast Alaskan communities because limited land resources are forcing development of regional wetlands. This study was instigated by concerns that proposed modifications to a nearby rifle range using DRO-contaminated soil posed a potential risk to an anadromous fish-bearing stream 250 m from the site. Three pairs of peat columns were extracted from the rifle range for analysis, one pair along and two pairs across the natural bedding planes of the soil. One column in each pair was spiked with Pb and DRO and the other was used as a control. Approximately 1-year worth of water (171 cm) was passed through each column and leachate was collected at regular intervals. The results showed that substantial DRO transport only occurred along the bedding planes. Leads was surprisingly mobile, both along and across the bedding planes with estimated soil-water partition coefficients several orders of magnitude lower than commonly published values, probably because the peat was heavily Pb-loaded by lead from bullets and because the pear's acidic, organic-rich environment enhanced Pb mobility. The chemical outflow behavior agreed with a simple maeropore transport model. These results underscore the need for caution when developing regional wetlands.

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    Citation

    Deiss, Julian; Byers, Carl; Clover, Dave; D''Amore, Dave; Love, Alan; Menzies, Malcolm A.; Powell, J.; Walter, Todd M. 2004. Transport of lead and diesel fuel through a peat soil near Juneau, AK: a pilot study. Journal of Contaminant Hydrology. 74: 1-18

    Keywords

    Peat, contaminant transport, lead (Pb), diesel range organic (DRO), macmpore, rifle range, wetland

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