HR: 1400h
AN: GS23B-06    [Abstracts]
TI: Germination and Seedling Growth of Perennial Ryegrass in Acid Sulfate Soil Treated by Pyrite Nano-Encapsulation
AU: * Lee, J
EM: jsly@kigam.re.kr
AF: Korea Institute of Geoscience & Mineral Resources (KIGAM), 30 Gajeong-dong, Yuseong- gu, Daejeon, 305-350, Korea, Republic of
AU: Kim, J
EM: jgkim@kigam.re.kr
AF: Korea Institute of Geoscience & Mineral Resources (KIGAM), 30 Gajeong-dong, Yuseong- gu, Daejeon, 305-350, Korea, Republic of
AU: Yi, J
AF: Korea Institute of Geoscience & Mineral Resources (KIGAM), 30 Gajeong-dong, Yuseong- gu, Daejeon, 305-350, Korea, Republic of
AU: Kim, T
AF: Korea Institute of Geoscience & Mineral Resources (KIGAM), 30 Gajeong-dong, Yuseong- gu, Daejeon, 305-350, Korea, Republic of
AB: The trial pot experiment was conducted to validate the effect of encapsulation in reduction of acid rock drainage. Six different treatments were performed: A = control, four times spraying of distilled water; B = four times of 0.01 M H₂O₂; C = once-encapsulated and three times spraying of distilled water; D = twice-encapsulated and twice spraying of distilled water; E = three times-encapsulated and once spraying of distilled water and F = four times-encapsulated for the acid sulfate soil with pyrite bearing andesite powder and sand. After the encapsulation treatment, the perennial ryegrass (Loium perenne) was sowed to evaluate germination rate and growth for three months. The leachate was examined for the chemical properties. The leachate from the A pot (control) is characterized as acidic (pH below 3) and high concentrations of SO₄^-2: 12,022 mg/L, Al: 85.8 mg/L and Mn: 34.1 mg/L which can be toxic effect to the plant growth. However, the leachate from encapsulated pots showed near neutral (pH 6 to 7) and low concentrations of SO₄^-2 (below 3,000 mg/L), Al (below 45mg/L) and Mn (24 gm/L). The frequency of encapsulation treatment is related to reduction of acidic drainage. It was hard to identify the significant difference of the seed germination rate of ryegrass between the treatments, although root and shoot growth showed three times difference between the control (1.90g/pot) and four times encapsulated treatment (6.33g/pot) after 2 month growth. It is suggested that encapsulation of pyrite in acid sulfate soil causes the reduction of acidic drainage resulting in the higher growth of herbaceous plants.
DE: 1000 GEOCHEMISTRY
SC: Geochemical Society [GS]
MN: 2007 Joint Assembly