Evaluation of dissipation mechanisms for benzo[a]pyrene in the rhizosphere of tall fescue
- Purdue Univ., West Lafayette, IN (United States)
- Kansas State Univ., Manhattan, KS (United States). Dept. of Civil Engineering
Although polycyclic aromatic hydrocarbons are common contaminants in soil and are potentially carcinogenic and mutagenic, little is known about their fate in the soil/root environment. The impact of tall fescue (Festuca arundinacea Schreber) on chemical and biological transformations of benzo[a]pyrene in soil was investigated in a greenhouse experiment in which [sup 14]C-benzo[a]pyrene was added to soil and placed in sealed chambers with and without plants. The distribution of [sup 14]C in soil, plant tissue, and CO[sub 2] was quantified. Dissipation due to mineralization and volatilization accounted for <2% of the total [sup 14]C added in both planted and unplanted chambers and was greater in the presence of plants. Plant uptake of [sup 14]C was <0.12%. Residual benzo[a]pyrene was lower in soil with plants than in the absence of plants. The majority of the [sup 14]C label was associated with the soil matrix. The presence of plants enhance the degradation of highly adsorbed, recalcitrant benzo[a]pyrene in soil.
- OSTI ID:
- 6150585
- Journal Information:
- Journal of Environmental Quality, Vol. 28:1; ISSN 0047-2425
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BENZOPYRENE
BIODEGRADATION
BIOLOGICAL ACCUMULATION
BIOLOGICAL AVAILABILITY
GRAMINEAE
LAND POLLUTION
REMEDIAL ACTION
SOILS
AROMATICS
CHEMICAL REACTIONS
CONDENSED AROMATICS
DECOMPOSITION
HYDROCARBONS
LILIOPSIDA
MAGNOLIOPHYTA
ORGANIC COMPOUNDS
PLANTS
POLLUTION
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
560300 - Chemicals Metabolism & Toxicology