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| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/pdfs/30/5/1644
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https://dl.sciencesocieties.org/publications/jeq/articles/30/5/1644
Last checked: 12/14/2016
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Seol, Yongkoo;
Lee, Linda S. |
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| Author Affiliation: | Department of Agronomy, Purdue University |
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| Title: | Coupled effects of treated effluent irrigation and wetting-drying cycles on transport of triazines through unsaturated soil columns |
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| Section: | Organic compounds in the environment
Other records with the "Organic compounds in the environment" Section
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| Source: | Journal of Environmental Quality. Vol. 30, No. 5, September/October 2001, p. 1644-1652. |
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| Publishing Information: | Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Effluent water; Irrigation; Pesticide fate; Triazines; Prometryn; Atrazine; Soil pH; Soil texture; Leachates; pH; Temperatures; Drying; Pesticide persistence
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| Abstract/Contents: | "The physical and chemical paramters controlling the movement of atrazine (6-chloro-N2-ethyl-N4-isopropyl-1,3,5- triazine-2,4- diamine; 98.8%) and prometryn [N,N' -bis(1-methylethyl)-6-(methylthio)-1,3,5-triazine-2, 4-diamine; 99.5%] were investigated in columns infiltrated with treated effluent under unsaturated transient conditions and subjected to drying events at 22 or 60°C followed by rewetting. Three soils varying in soil pH and texture and three solutions were used. The infiltrating solutions consisted of either a CaCl2 matrix (CC), a swine waste-derived lagoon effluent (SW), or a simulated buffer solution (SB) representative of the element composition and pH of the SW but with now dissolved organic matter. Several parameters were monitored including leachate triazine concentrations, pH, dissolved organic carbon (DOC), inorganic carbon, and flow rates. Compared with CC, application of SW and SB increased column leachate pH, enhanced dissolution of organic carbon and particle dispersion, and decreased average flow rates, which allowed for increased desorption time. The coupled effect of these processes enhanced movement of triazines in some cases, with SW generally having the greatest effect. The individual effect of increased pH was more pronounced for prometryn (pKa=4.05) versus atrazine (pKa=1.66), and most dramatic for the soil with the lowest initial pH. High-temperature drying, which simulated intensive evaporation, further enhanced the dissolution of soil organic matter and the reduction in leachate flow rates with SW and SB applications; however, the net effect under the experimental conditions employed varied with soil type. Relative to low-temperature drying, high-temperature drying in the silty clay loam-packed columns reduced pestcide migration." |
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| Language: | English |
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| References: | 20 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Seol, Y., and L. S. Lee. 2001. Coupled effects of treated effluent irrigation and wetting-drying cycles on transport of triazines through unsaturated soil columns. J. Environ. Qual. 30(5):p. 1644-1652. |
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| Web URL(s):
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Last checked: 12/14/2016
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Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/articles/30/5/1644
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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