한국광물학회지 (Journal of the Mineralogical Society of Korea)

  • 제20권4호
  • /
  • Pages.327-337
  • /
  • 2007
  • /
  • 1225-309X(pISSN)
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  • 2288-7172(eISSN)
한국광물학회 (The Mineralogical Society of Korea)
권호 표지

영동 일라이트의 인산염 흡착 특성

Phosphate Adsorption of Youngdong Illite, Korea

  • 조현구 (경상대학교 지구환경과학과 및 기초과학연구소) ;
  • 박옥희 (경상대학교 지구환경과학과 및 기초과학연구소) ;
  • 문동혁 (경상대학교 지구환경과학과 및 기초과학연구소) ;
  • 도진영 (경주대학교 문화재학부) ;
  • 김순오 (경상대학교 지구환경과학과 및 기초과학연구소)
  • Cho, Hyen-Goo (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University) ;
  • Park, Ok-Hee (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University) ;
  • Moon, Dong-Hyuk (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University) ;
  • Do, Jin-Young (School of Cultural Assets, Gyeongju University) ;
  • Kim, Soo-Oh (Department of Earth and Environmental Sciences and Research Institute of Natural Science, Gyeongsang National University)
  • 발행 : 2007.12.30
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초록

흰색, 노란색, 정제된 노란색 등 3 가지 종류의 영동 일라이트에 대하여 정량 X선 회절분석법에 의하여 광물조성을 구하였으며, 레이저 입도분석기를 이용하여 입자 크기 및 입도 분포를 측정하였다. 영동 일라이트의 인산염 흡착 특성을 규명하기 위하여 배치(batch) 흡착 실험을 실시하였다. 흰색 일라이트는 노란색 일라이트에 비하여 적은 양의 일라이트를 포함하고 있지만, 입자 크기는 더 작다. 정제된 노란색 일라이트는 정제하지 않은 시료에 비하여 월등히 많은 일라이트를 포함하며, 입자 크기도 훨씬 미세하다. 일라이트의 양이 많아짐에 따라 인산염의 흡착률은 대체로 증가하는 경향을 보이는데 반하여, pH가 증가하면 인산염의 흡착량은 감소하는 경향을 나타낸다. 일반적으로 일라이트의 함량이 많고, 입자 크기가 미세할수록 인산염의 흡착량이 증가하지만, 일라이트의 함량이 적은 흰색일라이트가 노란색 일라이트보다 더 많은 인산염을 흡착하는 이유는 작은 입자 크기, 높은 층간 전하, 낮은 사면체 자리의 치환에 기인한 것으로 여겨진다. 흰색 일라이트는 랑미어 흡착등온선, 노란색 일라이트는 프로인드리히 흡착등온선에 더욱 잘 부합하는 경향을 보여주고 있다.

Mineral compositions were determined using quantitative X-ray diffraction analysis on the three kinds of Youngdong illite consisting of white, yellow and refined yellow samples. Mean particle size and their size distribution patterns were measured by laser particle size analyzer. The characteristics of phosphate adsorption on illite were studied through batch adsorption experiments. The white illite has less illite content, but is finer than that of yellow. The refined yellow illite has more illite content and finer particle size compared with those of raw yellow illite. The adsorption rate of phosphate generally increases when the mass of illite increases, whereas adsorption quantity decreases with ascending pH. The phosphate adsorption usually increases with ascending illite content or descending particle size. Although the white illite has lower illite content than the yellow, the former has higher phosphate adsorption quantity than the latter. This can be ascribed to the fine particle size, high interlayer charge, and low substitution in tetrahedral site of white illite. The adsorption isotherms of white illite are well fitted with the Langmuir equation, however those of yellow one are better with Freundlich equation.

키워드

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