Bound residue formation in PAH contaminated soil composting using Phanerochaete chrysosporium
- Utah State Univ., Logan (United States)
The degradation rate of benzo(a)pyrene (B(a)P), a 5-ring PAH compound, was significantly enhanced in fungal (Phanerochaete chrysosporium) enriched soil composting microcosm reactors over that observed in unamended soil systems. The maximum B(a)P removal rate was 1.1 {mu}g/g-soil-day with fungal inoculation compared to 0.24 {mu}g/g-soil-day without fungal inoculation for a silt loam Kidman soil. Mass balance considerations suggested that the enhanced removal of B(a)P resulted in the formation of bound contaminant carbon residues in soil. A maximum bound residue formation rate of 0.37 {mu}g/g-soil-day was estimated in fungal inoculated microcosms. This was significantly different from the zero rate under natural soil conditions. The observed B(a) mineralization rates were less affected by fungal activity than was B(a)P removal. Degradation of B(a)P resulted in humification (i.e. polymerization) of most of contaminant carbon rather than conversion to CO{sub 2}. The fraction of contaminant carbon that was humified compared to that which was mineralized was dependent on soil type. A multi-compartment structural activity model has been developed to illustrate the overall degradation of B(a)P during soil composting.
- OSTI ID:
- 5598541
- Journal Information:
- Hazardous Waste and Hazardous Materials; (United States), Vol. 8:2; ISSN 0882-5696
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
BENZOPYRENE
BIODEGRADATION
BIOLOGICAL MODELS
COMPOSTING
HUMUS
LAND POLLUTION CONTROL
LAND RECLAMATION
LOAM
MICROCOSMS
MINERALIZATION
PHANEROCHAETE
AROMATICS
CHEMICAL REACTIONS
CONDENSED AROMATICS
CONTROL
DECOMPOSITION
EUMYCOTA
FUNGI
HYDROCARBONS
MANAGEMENT
ORGANIC COMPOUNDS
PLANTS
POLLUTION CONTROL
PROCESSING
SOILS
WASTE MANAGEMENT
WASTE PROCESSING
560300* - Chemicals Metabolism & Toxicology
540250 - Environment
Terrestrial- Site Resource & Use Studies- (1990-)