Formation and fate of bound residues of (/sup 14/C)benzene and (/sup 14/C)chlorobenzenes in soil and plants

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Ecotoxicol. Environ. Saf.; (United States)

DOI:https://doi.org/10.1016/0147-6513(85)90018-1· OSTI ID:5268349

Scheunert, I; Topp, E; Schmitzer, J; Klein, W; Korte, F

Outdoor experiments with (/sup 14/C)hexachlorobenzene, (/sup 14/C)pentachlorobenzene, (/sup 14/C)1,2,4-trichlorobenzene, and (/sup 14/C)benzene in soil-crop systems indicate that the formation rate of bound residues in soil and plants, expressed as bound residues in percentage of total residue in the sample, decreases with increasing number of chlorine in the molecule and, thus, with increasing chemical stability. The time course of formation and fate of bound residues in soil and plants is characterized by a very slow decrease of residue levels in soil, indicating that biodegradation of bound residues hardly exceeds their reformation from the parent compound during one vegetation period, and by a decrease of residue levels in plants. The portion of bound residues as compared to the total residue increases with time, indicating that bound residues are more persistent than the parent compounds and their soluble metabolites; benzene is an exception. Cress plants, in general, contain less bound residues than do barley plants. Again, benzene is an exception. In deeper soil layers, soil-bound residues occur also. The ratio between bound and extractable residues does not differ to a larger extent between the soil layers.

• Research Organization: Institut fuer Okologische Chemie, Neuherberg, Germany, F.R.
• OSTI ID: 5268349
• Journal Information: Ecotoxicol. Environ. Saf.; (United States), Journal Name: Ecotoxicol. Environ. Saf.; (United States) Vol. 2; ISSN EESAD
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
550201 -- Biochemistry-- Tracer Techniques
59 BASIC BIOLOGICAL SCIENCES
AROMATICS
BENZENE
BIODEGRADATION
BIOLOGICAL ACCUMULATION
CARBON 14 COMPOUNDS
CHEMICAL REACTIONS
CHEMISTRY
CROPS
DECOMPOSITION
HYDROCARBONS
LABELLED COMPOUNDS
METABOLITES
ORGANIC COMPOUNDS
PLANTS
RESIDUES
SOIL CHEMISTRY
SOILS