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| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/pdfs/31/4/1226
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https://dl.sciencesocieties.org/publications/jeq/articles/31/4/1226
Last checked: 12/15/2016
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Lu, Jianhang;
Wu, Laosheng;
Letey, John;
Farmer, Walter J. |
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| Author Affiliation: | Department of Environmental Sciences, University of California, Riverside, California |
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| Title: | Anionic polyacrylamide effects on soil sorption and desorption of metolachlor, atrazine, 2,4-D, and picloram |
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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. 31, No. 4, July/August 2002, p. 1226-1233. |
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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: | 8 |
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| Keywords: | TIC Keywords: Polyacrylamides; Anions; Soil sorption; Desorption; Metolachlor; Atrazine; 2,4-D; Picloram; Environmental effects; Application rates
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| Abstract/Contents: | "Polyacrylamide (PAM) treatment of irrigation water is a growing conservation technology in irrigated agriculture in recent years. There is a concern regarding the environmental impact of PAM after its application. The effects of anionic PAM on the sorption characteristics of four widely used herbicides (metolachlor, atrazine, 2,4-D, and picloram) on two natural soils were assessed in batch equilibrium experiments. Results showed that PAM treatment kinetically reduced the sorption rate of all herbicides, possibly due to the slower diffusion of herbicide molecules into interior sorption sites of soil particles that were covered and/or cemented together by PAM. The equilibrium sorption and desorption amounts of nonionic herbicides (metolachlor and atrazine) were essentially unaffected by anionic PAM, even under a high PAM application rate, while the sorption amounts of anionic herbicides (2,4-D and picloram) were slightly decreased and their desorption amounts increased little. The impact mechanisms of PAM were related to the molecular characteristics of PAM and herbicides. The negative effects of PAM on the sorption of anionic herbicides are possibly caused by the enhancement of electrostatic repulsion by presorbed anionic PAM and competition for sorption sites. However, steric hindrance of the large PAM molecule weakens its influence on herbicide sorption on interior sorption sites of soil particles, which probably leads to the small interference on herbicide sorption, even under high application rates." |
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| Language: | English |
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| References: | 36 |
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| See Also: | Other items relating to: 2, 4 - D in Turf |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Lu, J., L. Wu, J. Letey, and W. J. Farmer. 2002. Anionic polyacrylamide effects on soil sorption and desorption of metolachlor, atrazine, 2,4-D, and picloram. J. Environ. Qual. 31(4):p. 1226-1233. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/pdfs/31/4/1226
Last checked: 12/15/2016
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Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/jeq/articles/31/4/1226
Last checked: 12/15/2016
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 900 .J6 |
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