Full TGIF Record # 76140
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Web URL(s):https://dl.sciencesocieties.org/publications/jeq/pdfs/30/5/1523
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https://dl.sciencesocieties.org/publications/jeq/articles/30/5/1523
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Publication Type:
i
Refereed
Author(s):Park, Jeong-Hun; Kay, Denise; Zhao, Xianda; Boyd, Stephen A.; Voice, Thomas C.
Author Affiliation:Park, Zhao, and Voice: Department of Civil and Environmental Engineering, Michigan State University; Kay and Boyd: Department of Crop and Soil Sciences, Michigan State University
Title:Kinetic modeling of bioavailability for sorbed-phase 2,4-dichlorophenoxyacetic acid
Section:Bioremediation and biodegradation
Other records with the "Bioremediation and biodegradation" Section
Source:Journal of Environmental Quality. Vol. 30, No. 5, September/October 2001, p. 1523-1527.
Publishing Information:Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
# of Pages:5
Keywords:TIC Keywords: Models; 2,4-D; Pesticide fate; Desorption; Biodegradation; Biomass
Abstract/Contents:"The degradation rate of 2,4-dichlorophenoxyacetic acid (2,4-D) was studied in silica-slurry systems to evaluate the bioavailability of sorbed-phase contaminant. After the silica particles were saturated with 2,4-D, the system was inoculated with the 2,4-D-degrading micro-organism Flavorbacterium sp. strain FB4. The disappearance rate of 2,4-D was found to be greater than the rate predicted based upon liquid-phase 2,4-D concentrations. A kinetic formulation, termed the enhanced bioavailability model, was developed to describe the desorption and biodegradation processes in this batch system. The approach assumes that 2,4-D resides in both the liquid and solid phases and degradation occurs via both suspended and attached biomass. All biomass can degrade liquid-phase 2,4-D at one rate, while only attached biomass can degrade sorbed 2,4-D at one rate, while only attached biomass can degrade sorbed 2,4-D at another rate. An enhanced transformation factor (Ef) was introduced to express the increased biodegradation rate over that expected from the liquid phase only. This approach was able to account for the increased degradation rates observed experimentally. The results provide evidence that desorption to the bulk solution is not prerequisite to degradation, and that sorbed substrate may be available for degradation."
Language:English
References:21
See Also:Other items relating to: 2, 4 - D in Turf
Note:Figures
Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Park, J.-H., D. Kay, X. Zhao, S. A. Boyd, and T. C. Voice. 2001. Kinetic modeling of bioavailability for sorbed-phase 2,4-dichlorophenoxyacetic acid. J. Environ. Qual. 30(5):p. 1523-1527.
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Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/pdfs/30/5/1523
    Last checked: 12/14/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/articles/30/5/1523
    Last checked: 12/14/2016
    Access conditions: Item is within a limited-access website
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MSU catalog number: S 900 .J6
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