대한환경공학회지 (Journal of Korean Society of Environmental Engineers)
- 제22권6호
- /
- Pages.1045-1053
- /
- 2000
- /
- 1225-5025(pISSN)
- /
- 2383-7810(eISSN)
토양내 제초제의 흡착·탈착 특성
The Adsorption and Desorption of Herbicides in Soils
- Ra, Deog-Gwan (Department of Environmental Engineering, Sunchon National University) ;
- Park, Sang-Sook (Department of Environmental Engineering, Sunchon National University) ;
- Jung, Jae-Sung (Department of Environmental Engineering, Sunchon National University) ;
- Kim, Young-Kyu (College of Engineering, Chonbuk National University) ;
- O, Tae-Sun (Green Environmental Co.)
- 투고 : 2000.01.21
- 심사 : 2000.03.17
- 발행 : 2000.06.30
초록
제초제로 사용되는 napropamide와 pendimethalin의 토양내 흡착 탈착특성을 파악하기 위하여 진탕시간, 유기물함량, pH, 온도 등을 변화시키면서 실험을 수행하였다. Sandy loam, silty clay, loam 토양에 대하여 napropamide 및 pendimethalin이 흡착 탈착 평형에 도달되기 위한 진탕시간은 각각 12시간 및 6시간으로 나타났다. 평형흡착 탈착에 도달되었을 때 각 토양에 대한 napropamide의 흡착율 및 탈착율은 각각 23.35%, 31.57%, 25.95% 및 18.42%, 13.42%, 15.89%, pendimethalin은 각각 59.61%, 77.26%, 64.02% 및 3.23%, 2.93%, 3.07%이었다. 등온흡착은 Langmuir식보다는 Freundlich식에 적합하였다. 유기물함량이 2.0% 이상에서의 흡착은 유기물의 영향을 받고, 그 이하에서는 점토의 영향을 받고 있음을 알 수 있었다. 유기물함량 0.95~7.45(%)의 범위에서 흡착계수(
The adsorption and desorption of herbicides such as napropamide and pendimethalin was studied in three kinds of soil. sandy loam. silty clay and loam. The results of batch tests performed with various shaking time, pH, organic matter content and temperature in soil were summarized as follows. The shaking times reached to the equilibrium of the adsorption and desorption for napropamide and pendimethalin in soil were 12 and 6 hours. respectively. For each soil. the adsorption rates of napropamide were 23.35%. 31.57% and 25.95%, the desorption rates of them were 18.42%, 13.42% and 15.89%, respectively. And the adsorption rates of pendimethalin were 59.61%, 77.26% and 64.02%, and the desorption rates of them were 3.23%, 2.93% and 3.07%, respectively. The adsorption isotherms with the Freundlich equation showed better consistency than those with the Langmuir one. The adsorption was affected by the organic matter content when it exceed 2.0%. But if the organic matter content is below 2.0%, it was affected by the clay content. When the organic matter content is 0.95~7.45%, the adsorption coefficients (