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Adsorption, desorption and movement of napropamide in soils
The purpose of this study is to elucidate the adsorption, desorption and movement of napropamide in soils, that have been mainly used in farmland. Experiments were carried out with the adsorption and desorption tests on various shaking time, temperature, pH and the content of organic matter, and column test, in order to understand the movement characteristics of napropamide. As results, the isothermal adsorption characteristics of napropamide were well fitted with the Freundlich rather than with the Langmuir equation. When the content of organic matter in soil exceeded 2.0%, the adsorption rate of napropamide depended on the content of organic matter. However, in case the content of organic matter was below 2.0%, the content of clay became a determiner. Adsorption and desorption was little affected by pH. Though the adsorption was affected by soil temperature, desorption was little. The slope of adsorption curve was in the order of sandy loam>loam>silty clay. But a lot of napropamide was desorbed from the silty clay soil, even though its movement was slower than other two soils.
Adsorption, desorption and movement of napropamide in soils
The purpose of this study is to elucidate the adsorption, desorption and movement of napropamide in soils, that have been mainly used in farmland. Experiments were carried out with the adsorption and desorption tests on various shaking time, temperature, pH and the content of organic matter, and column test, in order to understand the movement characteristics of napropamide. As results, the isothermal adsorption characteristics of napropamide were well fitted with the Freundlich rather than with the Langmuir equation. When the content of organic matter in soil exceeded 2.0%, the adsorption rate of napropamide depended on the content of organic matter. However, in case the content of organic matter was below 2.0%, the content of clay became a determiner. Adsorption and desorption was little affected by pH. Though the adsorption was affected by soil temperature, desorption was little. The slope of adsorption curve was in the order of sandy loam>loam>silty clay. But a lot of napropamide was desorbed from the silty clay soil, even though its movement was slower than other two soils.
Adsorption, desorption and movement of napropamide in soils
KSCE J Civ Eng
Kim, Young-Kyu (author)
KSCE Journal of Civil Engineering ; 8 ; 619-623
2004-11-01
5 pages
Article (Journal)
Electronic Resource
English
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