Metal retention in a thin karstic soil, Christian County, Missouri

Citation
L. Shepard et M. Gutierrez, Metal retention in a thin karstic soil, Christian County, Missouri, ENVIR GEOL, 37(1-2), 1999, pp. 107-111
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
ENVIRONMENTAL GEOLOGY
ISSN journal
0943-0105 → ACNP
Volume
37
Issue
1-2
Year of publication
1999
Pages
107 - 111
Database
ISI
SICI code
0943-0105(199901)37:1-2<107:MRIATK>2.0.ZU;2-L
Abstract
The response of a Wilderness cherty loam series soil to repeated dosages of metals (as sewage sludge) using a two-step sequential extraction procedure was investigated. Variations in metal content between amended and control soils were related to organic matter, clay content, and day mineralogy. Of the four metals investigated, Cu was found to accumulate in the top 20 cm o f amended soils; Pb and Zn were present in even smaller amounts with respec t to the control soils, and Cr concentrations were unaffected with respect to both depth and amendment. None of the metals indicated accumulation in d eeper (>20 cm) parts of the soil profile. Overall, results suggest that the metals remobilize in the top 20 cm, being readily uptaken by the fescue gr ass growing in this lot. Precipitation of insoluble forms of metal into dee per parts of the soil profile was proven unlikely based on the distribution of metal concentrations throughout the profile.