Heavy metal accumulation by common garden plants: A chemical and spectroscopic approach

ENVR 133

Mimi Roy, mroy3@mix.wvu.edu and Louis McDonald. Department of Plant and Soil Sciences, West Virginia University, Davis College of Agriculture, Forestry and Consumer Sciences, Morgantown, WV 26506
Pot experiments were conducted to investigate the relationship of common garden plants with a soil heavily contaminated with zinc, lead, cadmium, and copper. Plants used for this study were clover, radish, carrots, and spinach. Plants were grown for 3 months and then investigated by different chemical and spectroscopic tools. Plant tissue concentrations indicated that the largest accumulation of the metals were mostly in carrots and radishes. Radish showed prominent signs of chlorosis after 8-10 weeks. Clover, however, survived in these soils for more than 12 weeks with little to phytotoxic signature in their phenotypes. Transport of metals from root to shoots was significant in radish and to some extent in carrots. The bioavailability index followed the order Cd>Zn>Pb>Cu. Low molecular weight thiols were quantified by UV-VIS spectrosocopy within the tissues and showed a linear relationship with Cd and Zn concentrations with little to no relationship with Pb and Cu.

General Papers
6:00 PM-8:00 PM, Wednesday, August 20, 2008 Pennsylvania Convention Center -- Hall C, Poster

8:00 PM-10:00 PM, Monday, August 18, 2008 Pennsylvania Convention Center -- Hall C, Sci-Mix

Division of Environmental Chemistry

The 236th ACS National Meeting, Philadelphia, PA, August 17-21, 2008