한국토양비료학회지 (Korean Journal of Soil Science and Fertilizer)
- 제19권2호
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- Pages.107-113
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- 1986
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- 0367-6315(pISSN)
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- 2288-2162(eISSN)
Gibbsite와 유기물(有機物) 처리(處理) 및 pH변화(變化)가 토양(土壤)의 SO4= 흡착(吸着)에 미치는 영향(影響)
Effects of Change in Soil pH and Treatment of Gibbsite and Organic Matter on Sulfate Adsorption in Soils
- Yoon, Sun-Kang (College of Agriculture, Seoul Nat'l Univ.) ;
- Yoo, Sun-Ho (College of Agriculture, Seoul Nat'l Univ.)
- 발행 : 1986.06.30
초록
pH, Gibbsite 및 유기물(有機物)이 토양(土壤)에 의한
Laboratory experiments were carried out to investigate the effects of pH, gibbsite, and organic matter on sulfate adsorption by soils. Samples of five soil series (Songjeong, Gopyung, Yeasan, Gyorae, and Namwon), different in physical and chemical properties, were used in this study. The results obtained from sulfate adsorption experiment with sulfate solutions of the concentrations ranging from 50 to 400 ppm were as follows: 1. The adsorption phenomena for five soils were well described by the Freundlich adsorption isotherm over a given range of sulfate concentration. 2. The amounts of sulfate adsorbed and K value of Freundlich adsorption isotherm increased as the initial pH of the suspension decreased. 3. Although the changes in pH of the suspension on the adsorption equilibrium were hardly observed in the soil treated with gibbsite, the sulfate adsorption rates were increased with amount of gibbsite treated. 4. The effects of pH of the suspension on the adsorption rates in the soils treated with gibbsite were remarkable at the level of 0.1% but were little at the level of 1.5%. 5. The adsorption rates of soils, treated with organic matter and incubated for three weeks, were in the order: starch > straw > compost. At the relatively high levels (5 and 10%) of treatments, compost treatment resulted in the sulfate desorption phenomena.
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