Skip to Main Content
Lead Transport into Bayou Trepagnier Wetlands in Louisiana, USAAuthor(s): Margaret S. Devall; Leonard B. Thien; Erik Ellgaard; George Flowers
Source: Journal of Environmental Quality Vol. 35(3): 758-765
Publication Series: Miscellaneous Publication
PDF: View PDF (328 KB)
DescriptionEstablishment of a petroleum refinery in 1916 near the headwaters of Bayou Trepagnier with subsequent dredging of the bayou resulted in spoil banks containing high levels of Pb. A large swamp abuts the eastern bank of the bayou. Cores were taken from 15 baldcypress [Taxodium distichum (L.) Richard] trees growing in the swamp along a 610-m transect (nine trees) and a 183-m transect (six trees) running perpendicular from the spoil bank. The cores were crossdated, annual rings were measured, and 5-yr segments of the cores were prepared and analyzed for heavy metals. Soil samples were collected along one transect and analyzed for metals. Levels of Pb in Bayou Trepagnier swamp trees were compared to levels in nine baldcypress trees growing along Stinking Bayou, a reference area. During the last 100 yr, Pb in growth rings of swamp baldcypress trees averaged 8.6 mg/kg (SD 4.88) along one transect and 7.9 mg/kg (SD 5.39) along the other. Lead in the soil along the first transect dropped from .2700 mg/kg (spoil bank) to 10mg/kg at 420 m into the swamp. Baldcypress trees growing near the refinery on the spoil bank along Bayou Trepagnier (covered in an earlier study) averaged 4.5 mg/kg Pb, and trees along Stinking Bayou averaged 2.1mg/kg. Trees in the swamp soil with 10 to 425 mg/kg Pb concentrated much more Pb than trees growing on the heavily polluted bank. Greater uptake of Pb by trees in the swamp is discussed in terms of soil dynamics and Pb sources.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationDevall, Margaret S.; Thien, Leonard B.; Ellgaard, Erik; Flowers, George. 2006. Lead Transport into Bayou Trepagnier Wetlands in Louisiana, USA. Journal of Environmental Quality Vol. 35(3): 758-765
- The Effects of Intermittent Flooding on Seedlings of Three Forest Species
- Restoration methods for deepwater swamps
- Interaction of Soil Moisture and Seedling Shelters on Water Relations of Baldcypress Seedlings
XML: View XML