Kinetics of the uptake of sup 14 C-labeled chlorinated benzenes from soil by plants

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Ecotoxicology and Environmental Safety; (USA)

DOI:https://doi.org/10.1016/0147-6513(89)90034-1· OSTI ID:5512198

Topp, E; Scheunert, I; Korte, F ^[1]

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1. Institut fuer Okologische Chemie, Neuherberg (Germany, F.R.)

({sup 14}C)Benzene, ({sup 14}C)1,2,4-trichlorobenzene, ({sup 14}C)pentachlorobenzene, and ({sup 14}C)hexachlorobenzene were applied to soils in outdoor lysimeters to a 10-cm depth (2 mg/kg dry soil); barley and cress plants were grown for one vegetation period and analyzed after varying time intervals. The bioaccumulation factors (concentration of radioactive substances in plants divided by that in soils) of barley were higher than those of cress, except for hexachlorobenzene. In barley, bioaccumulation factors increased with decreasing chlorine content of the molecules, except for benzene, whereas in cress hexachlorobenzene exhibited the highest bioaccumulation factor. The conversion ratios of chlorinated benzenes (percentage of conversion products based on total radioactivity in plants) were negatively correlated to the chlorine content of the molecules and, in barley, positively correlated with time; in general, they were higher in barley than in cress. The concentration of radioactive substances in the plants, as well as bioaccumulation factors, decreased with time, except for a slight increase in benzene-derived residues in barley after 125 days. This effect is due to growth dilution. The percentage of radioactivity in barley seeds, based on that in the whole plant, was negatively correlated to the chlorine content of the molecule.

• OSTI ID: 5512198
• Journal Information: Ecotoxicology and Environmental Safety; (USA), Journal Name: Ecotoxicology and Environmental Safety; (USA) Vol. 17:2; ISSN EESAD; ISSN 0147-6513
• Country of Publication: United States
• Language: English

Related Subjects

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560300* -- Chemicals Metabolism & Toxicology
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION
AROMATICS
BARLEY
BENZENE
BIOLOGICAL ACCUMULATION
CARBON 14 COMPOUNDS
CEREALS
CHLORINATED AROMATIC HYDROCARBONS
GRAMINEAE
GROWTH
HALOGENATED AROMATIC HYDROCARBONS
HYDROCARBONS
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
LAND POLLUTION
LILIOPSIDA
MAGNOLIOPHYTA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PLANT GROWTH
PLANTS
POLLUTION
ROOT ABSORPTION
SOILS
TRACER TECHNIQUES
UPTAKE