Effects of Orocol TL (a corrosion inhibitor) on germination and growth of bush beans
As part of a continuing series of studies conducted to determine the environmental effects of hexavalent chromium from cooling tower drift on biological systems, the potential for germination and growth effects in bush beans (Phaseolus vulgaris L. var Bush Blue Lake) from hexavelent chromium in Orocol TL (a proprietary chromated, zinc-phosphate compound added to DOE cooling water systems for corrosion inhibition) was investigated at low and high concentrations in the soil by adjusting soil pH and the percent of organic matter. Germination effects were determined in bean plants grown in soils adjusted to differing pH range (4-4.5, 5-5.5, 6.5-7), levels of organic matter (1.8%, 3%, 5%) and Orocol TL amendments (control of 0 ..mu..g/g, 10 ..mu..g/g chromium). Growth responses (effects) were determined from bush bean plants cultured in the same soil treatment combinations as described for the germination study. Plants were harvested when the plant died or at the end of eight weeks and partitioned into leaves, stems and roots. Following weight determinations, the leaves, stems and roots were analyzed for total chromium content, and the results compared using analysis of variance and multiple comparison procedures. High levels (500 ..mu..g/g) of hexavalent chromium in soil (as Orocol TL) affected germination and growth, while a high level of organic matter significantly reduced chromium toxicity on germination. At lower chromium concentrations there was significant uptake by all plant parts, with a corresponding reduction in biomass of leaves. Consequently, adjustments of soil pH from 4.0 to 7.0 appear to have no significant effect on chromium uptake in plants. Increasing the organic matter level to 5%, while decreasing the toxicity of high chromium levels to germinating seed, did not affect chromium uptake.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5305866
- Report Number(s):
- ORNL/TM-7838; ON: DE82014575
- Country of Publication:
- United States
- Language:
- English
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560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL EFFECTS
CHARGED PARTICLES
CHROMIUM IONS
CORROSION INHIBITORS
DATA
DOSE-RESPONSE RELATIONSHIPS
EXPERIMENTAL DATA
GERMINATION
GROWTH
INFORMATION
IONS
LEGUMINOSAE
NUMERICAL DATA
ORGANIC MATTER
PH VALUE
PHASEOLUS
PLANT GROWTH
PLANTS
TOXICITY
UPTAKE
VALENCE