Effects of aging on the bioavailability and sorption/desorption behavior of biphenyl in soils

The effects of aging (soil-chemical contact time) on bioavailability, one of the main variables for determining the persistence of organic chemicals in the environment, is poorly understood. There are few studies that have tested the effects of long-term aging on chemical dynamics in soils and have...

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Bibliographic Details
Published in:Water science and technology 2005-01, Vol.52 (8), p.95-105
Main Authors: PARK, J.-H, SHARER, M, FENG, Y, CHUNG, S.-Y, VOICE, T. C, BOYD, S. A
Format: Article
Language:English
Subjects:
Absorption
Ageing
Aging
Air. Soil. Water. Waste. Feeding
Applied sciences
Bioavailability
Biological and medical sciences
Biological Availability
Biphenyl
Biphenyl Compounds - analysis
Biphenyl Compounds - chemistry
Biphenyl Compounds - pharmacokinetics
Carbon Radioisotopes
Desorption
Dynamics
Environment. Living conditions
Exact sciences and technology
Kinetics
Medical sciences
Michigan
Mineralization
Models, Theoretical
Organic chemicals
Organic chemistry
Pollution
Profiles
Pseudomonas putida
Pseudomonas putida - metabolism
Public health. Hygiene
Public health. Hygiene-occupational medicine
Soil
Soil - analysis
Soil chemistry
Soil dynamics
Soil Pollutants - analysis
Soil types
Soils
Sorption
Time Factors
Uptake
Water treatment and pollution
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Summary:The effects of aging (soil-chemical contact time) on bioavailability, one of the main variables for determining the persistence of organic chemicals in the environment, is poorly understood. There are few studies that have tested the effects of long-term aging on chemical dynamics in soils and have related these effects to bioavailability tests of these aged compounds. In this study, sorption/desorption behavior of biphenyl (BP) on two soil types (Capac A and Capac B) was evaluated for aging times of 24 hours and 8 months. Then bioavailability experiments of BP on the same soils were performed after aging times of 24 hours to 6 months. Sorption isotherms and desorption kinetic profiles were prepared to analyze changes in uptake and release, respectively, due to aging of BP. Mineralization kinetics of BP to 14CO2 by a strain of Pseudomonas putida was used to assess changes in bioavailability due to aging. Data indicates that there was an increase in sorption with aging time for BP on both soil types. The rate of BP desorption did not much change with increased aging time. The extent of BP mineralization was found to decrease with aging time.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2005.0235