The assessment of air and soil as contributors of some trace metals to vegetable plants. III. Experiments with field-grown plants.
Plants have been grown on common soils at a number of field sites with differing air metal concentrations. Moss bags were co-located with the plants to evaluate atmospheric deposition. Values of the concentration factor (CF) have been estimated (soil-derived metal in plant divided by soil metal concentration) and are generally found to be in the order Zn greater than Cd greater than Ni greater than Cr greater than Pb (sometimes Cd greater than Zn), with values for Pb comparable with earlier studies in which the atmospheric contribution was subtracted. Values of the air accumulation factor (AAF) (air-derived metal in plant divided by air metal concentration) showed values of 15-30 m3g-1 for Cd and Pb for the exposed parts of plants, and lower values for non-exposed parts. Values of both CF and AAF are comparable with those determined in Part I, using a laboratory growth chamber.
Institute of Aerosol Science, University of Essex, Colchester, United Kingdom.
R M
RM
Harrison
M B
MB
Chirgawi
D000393:Air Pollutants; D010944:Plants / Q000378:metabolism*; D012989:Soil Pollutants; D014131:Trace Elements / Q000032:analysis / Q000378:metabolism*; D014675:Vegetables / Q000032:analysis*
D000393:Air Pollutants; D012989:Soil Pollutants; D014131:Trace Elements