논토양에서 석탄회시용에 따른 중금속 축적가능성 평가
Evaluating the possibility of heavy metal accumulation by fly ash application in rice paddy soils
2
조회
0
다운로드
6
인용
0
참고문헌
초록
우리나라의 석탄회 발생량은 매년 증가되고 있으나 재활용율이 낮아 석탄회의 폐기처리가 심각한 문제가 되고 있어 토양개량제로서 재활용하고자, 석탄회에 포함되어있는 중금속이 벼의 수량 및 중금속 흡수특성과 토양 내 중금속의 이동성에 미치는 영향을 조사하였다. 석탄회의 시용에 따른 토양 내 중금속 총 함량과 0.1 N HCl 가용성 함량의 증가는 발견할 수 없었다. 이러한 결과는 석탄회 자체가 소량의 중금속을 함유하고 있고 토양 내 과량의 석탄회를 시용함으로 인한 토양의 희석효과에서 기인한 것으로 판단되다. 석탄회의 시용에 따라 토양 내 대부분의 중금속 성분은 생물체 흡수가 어려운 유기물 결합태(oxidizable phase)와 광물 내 고정된 중금속 형태(residual phase)로 존재하였다. 석탄회의 시용량 증가에 따른 벼 백미 내 중금속 흡수의 증가는 발견할 수 없었으며 생육기간 동안 생육장애는 나타나지 않았다. 이는 석탄회 시용에 따른 토양의 pH 증대와 유효인산의 증대에서 기인한 것으로 판단되었다.
Abstract
Coal combustion fly ash, which has a high available Si content and alkaline pH, was selected as a potential source of soil amendment in this study. Two field experiments were carried out to evaluate the possibility of heavy metal accumulation in silt loam (Pyeongtaeg series) and loamy sand (Nagdong series) of rice (Oryza sativa) paddy soils to which 0, 40, 80, and 120 Mg ha-1 of fly ash were added. Rice yields increased significantly with fly ash application and the highest rice yields were achieved following the addition of around 90 Mg ha-1 fly ash. Fly ash increased the soil pH but did not increase heavy metal uptakes of rice and heavy metal concentration in soils, due to very low concentration of heavy metals in the selected fly ash. Labile fraction of heavy metals (exchangeable + acidic fraction) was scarcely contained and most of them were stable and unavailable form (oxidizable and residual fraction). In conclusion, fly ash could be a good supplement to an inorganic soil amendments without heavy metal contamination in paddy soils.
참고문헌 (24)
- "Production and composition of the power plant coal ash in Korea. Proc. Symposium of Agricultural Utilization of Fly Ash. 23 Apr. 1999. KEPOCO & Gyeongsang National University", pp.1~23 (1999), Gyeongsang National University in Chinju
- "Effect of fly ash and lime on growth and composition of corn", pp.217~220 (1982)
- "Boron enrichment of plants and soils treated with coal ash. J. Plant Nutr. 3", pp.409~427 (1981)
- "Effect of industrial pollution on nitrogen and ash content in meadow phytocoenotic plants. Bot. Zh. 68", pp.1583~1591 (1983)
- "Effects of fly ash and gypsum application on soil improvement and rice cultivation." (2000), Gyeongsang National Unicersity
- "Growth and elemental composition of corn and bean seedlings as influenced by soil application of coal ash. J. Environ. Qual. 7", pp.416~421 (1978)
- "Utilization and disposal of fly ash and other coal residues in terrestrial ecosystem. A review. J. Environ. Qual. 9", pp.333~334
- "Physical and chemical properties of fly ash from coal-fired power plants with reference to environmental impacts. Residue Rev. 71", pp.83~120 (1979)
- "The potential for beneficial reuse of coal fly ash in Southwest Virginia mining environments.", (460-134,) (2002)
- "Fly ash effect on improving soil properties and rice productivity in Korean paddy soils.", 97, pp.1490~1497 (2006)
- "Sajeong soil science.", pp.181~183 (2002), Hyangmoon press.
- "Comparison of the feasibility of three extraction procedures for trace metal partitioning in sediments from south west Spain.", 246, pp.271~283 (2000)
- "Soil pollution by a pyrite mine spill in spain evolution in time.", 132, pp.395~401 (2004)
- "Interactions of metal ions with chitosan based sorbents: a review", 38, pp.43~74 (2004)
- "Speciation of heavy metals in soils and sediments. An account of the improvement and harmonization of extraction techniques undertaken under the auspices of the BCR of the Commission of the European Communities. In J Environ Anal Chem. 51", pp.135~151 (1993)
- "Use of sequential extraction to assess metal partitioning in soils.", 126, pp.225~233 (2003)
- "Further elements of importance. Principle of Plant Nutrition", chapter 19., pp.577~582 (1987)
- "and yield components of rice genotypes grown on flooded organic histosols. Crop Sci. 34", dat(ff), pp.733~737 (1994)
- "Effect of fly ash on the yield of Chinese cabbage and chemical properties of soil.", 30, pp.161~167 (1997)
- "Influence of fly ash application on content of heavy metals in the soil. Ⅱ. Content change by the successive application. J. Korean Soc. Soil Sci. Fert. 27 in Korean with English summary", pp.72~77 (1994)
- "Influence of fly ash application on content of heavy metal in the soil. Ⅰ. Content change by the application rate. J. Korean Soc. Soil Sci. Fert. 27 in Korean with English summary", pp.65~71 (1994)
- "Environmental chemistry of soils. Oxford University Press", 4, pp.158~164 (1994)
- "Immobilization and phytoavailability of cadmium in variable charge soils. Ⅰ. Effect of phosphate addition.", 250(s.), pp.83~94 (2003)
- "Environmental chemistry of soils. Oxford University Press", 4, pp.121~168 (1994)