Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Effect of fly ash on the physico-chemical properties

Fly Ash가 토양(土壤)의 물화학성(物化學性)에 미치는 영향(影響)

  • Park, Man (Department of Agricultural Chemistry, College of Agriculture, Kyung-pook National University) ;
  • Hur, Nam-Ho (Department of Agricultural Chemistry, College of Agriculture, Kyung-pook National University) ;
  • Choi, Jung (Department of Agricultural Chemistry, College of Agriculture, Kyung-pook National University)
  • 박만 (경북대학교 농과대학 농화학과) ;
  • 허남호 (경북대학교 농과대학 농화학과) ;
  • 최정 (경북대학교 농과대학 농화학과)
  • Published : 1991.10.11
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Abstract

The inorganic constituents in flay ash such as Ca, Mg, Al and Si were extracted by water and 0.5N-Acetic acid, and changes of the physical properties of the fly ash-treated soils were examined to find out the effect of fly ash on the chemical and physical properties of the soils. The dominant day minerals of fly ash were quartz and mullite. More inorganic constituents were extracted from the fly ash by acetic acid than by water. Si and A1 in fly ash were hardly extracted by water. Addition of fly ash to soil below 10%(W/W) caused improvement in the water permeability and the field moisture capacity of the soil, but did not influence the shrinkage and hardness of the soil. Therefore, it was apparent that the effect of the fly ash on the chemical and physical properties of the soils greatly dependedon soil reaction, the organic acid contents, and the amount of fly ash used in treatment.

Fly ash가 토양(土壤)의 화학성(化學性) 및 물리성(物理性)에 미치는 영향(影響)을 규명(糾明)하기 위하여 Fly ash를 증류수(蒸溜水) 및 0.5N-acetic acia로 추출하여 각종 무기성분(無機成分)의 용출량(溶出量)을 측정(測定)하고 Fly ash를 토양(土壤)에 처리(處理)한 경우 토양물리성(土壤物理性)의 변화(變化)를 조사(調査)하였다. Fly ash의 주요결정광물(主要結晶鑛物)은 mullite와 석영(石英)이었다. 증류수(蒸溜水)보다 Acetic acid로 Fly ash를 추출(抽出)할 경우 훨씬 많은 양(量)의 무기성분(無機成分)이 용출(溶出)되었다. 이때 Si 및 Al는 증류수(蒸溜水)에 의(依)해서 거의 용출(溶出)되지 않았다. 토양(土壤)의 투수성(透水性) 및 포장용수량(圃場容水量)은 Fly ash를 토양(土壤)에 10% 이하(以下) 첨가(添加)하면 향상(向上)되었으나 그 이상(以上) 처리시(處理時)에는 저하(低下)되었다. 토양(土壤)의 신축성(伸縮性) 및 경도(硬度)는 Fly ash를 10% 이하(以下)로 처리(處理)할 경우 큰 영향(影響)을 받지 않았다.

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