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Bioavailibility of Metals in Soils from Agriculture and Mining Sites to Plants, and the Effect of Metal (Mn, Se, Cu, Zn) Organic Matter Complexes: LaDonna M. Choate

Project Title: Bioavailibility of Metals in Soils from Agriculture and Mining Sites to Plants, and the Effect of Metal (Mn, Se, Cu, Zn) Organic Matter Complexes
Mendenhall Fellow: LaDonna M. Choate, (303) 236-1241, lchoate@usgs.gov
Duty Station: Denver
Start Date: April 7, 2002
Education: Ph.D. (Applied Chemistry/Soil Science), Colorado School of Mines, 2002
Research Advisors: Todd K. Hinkley, (303) 236-5850, thinkley@usgs.gov; Geoffrey S. Plumlee, (303) 236-1204, gplumlee@usgs.gov
Project Description: This research will investigate the bioavailability of metals in soils to plants. Standard methods (root elongation and OECD chemical testing methods) will be compared to a recent biotoxicity method (MetPlate). Soils, parent material, plant material and waste rock (for the mining sites) will be studied from agricultural and mining sites. This study will also investigate the bioavailability of different types of metal (Mn, Se, Cu, Zn) organic matter complexes (labile, slowly labile and stable) using fractionation techniques and hydroponics. The affect of the molecular weight of the metal organic matter complexes will also be studied.

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