Full TGIF Record # 76644
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Web URL(s):http://www.tandfonline.com/doi/pdf/10.1081/PFC-100106183
    Last checked: 03/28/2016
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Publication Type:
i
Report
Author(s):Hong, S.; Smith, A. E.
Author Affiliation:Department of Crop and Soil Sciences, College of Agricultural and Environmental Sciances, The University of Georgia, Georgia Experiment Station, Griffin, GA
Title:Sorption and mobility of dithiopyr in golf course greens rooting medium
Source:Journal of Environmental Science and Health: Part B: Pesticides, Food Contaminants, and Agricultural Wastes. Vol. B36, No. 5, 2001, p. 529-543.
# of Pages:15
Publishing Information:New York: Marcel Dekker
Keywords:TIC Keywords: Pesticide fate; Sorption; Mobility; Dithiopyr; Golf courses; Golf greens; Root zone; Temperatures; Peat; Sand; pH; Lysimeters; Drainage; Surface runoff; Groundwater contamination
Abstract/Contents:"Sorption and mobility of dithiopyr in golf course greens rooting medium (RM) were studied. The sorption increased from 20 to 27°C at 24 h after treatment (HAT) and reached equilibrium in 48 HAT at 20°C. The sorption isotherms had Freundlich values (KF) of 1122, 27.44 to 35.16, and 0.053 to 0.168 for peat moss, the RM, and quartz sand, respectively, and solid to aqueous phase partition coefficients (Kd) of 470 to 1706 L/kg, 14.61 to 84.4 L/kg, and 0.07 to 0.29 L/kg for peat moss, RM, and quartz sand, respectively. Generally, higher dithiopyr concentration in the aqueous solution and the reduced pH of the solution corresponded to the higher Kd values. The average values for dispersion (D, cm^D2/min), retardatoin coefficient (R), Bβ and Wω parameters for solute transport in the RM lysimeter; obtained from CXTFIT curve fitting of BR- breakthrough curves; were 0.95, 1.01, 1, and 93.89, respectively. After elutriation by 18 L of aqueous KNO3 (10 mM), greater than 90% of the added dithiopyr remained in the top 10 cm of the RM lysimeter and no detectable dithiopyr was present at depths beyond 35 cm. The lysimeter effluent contained dithiopyr at concentrations less than 3.5 μg/L. The R value obtained from CXFIT curve fitting is 38.5. Results from both sorption and mobility experiments indicated that dithiopyr is quite immobile in golf course greens RM and has minimal potential for movement into surface water drainage or ground water."
Language:English
References:20
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hong, S., and A. E. Smith. 2001. Sorption and mobility of dithiopyr in golf course greens rooting medium. J. Environ. Sci. Health. B36(5):p. 529-543.
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Web URL(s):
http://www.tandfonline.com/doi/pdf/10.1081/PFC-100106183
    Last checked: 03/28/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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