Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Sonication Effects on Froth Flotation for Deinking from Old Newspaper(ONP)

폐신문지(廢新聞紙)(ONP)로부터 부유선별(浮遊選別)을 이용한 잉크분리(分離)시 초음파처리(超音波處理) 효과(效果)

  • Lim, Gwang Il (Department of Chemical Engineering, Kwangwoon University) ;
  • Hwang, In Sung (Department of Chemical Engineering, Kwangwoon University) ;
  • Kim, Joung Woon (Department of Chemical Engineering, Kwangwoon University) ;
  • You, Kwang Suk (Korea Institute of Geoscience and Mineral Resources) ;
  • Ahn, Ji Whan (Korea Institute of Geoscience and Mineral Resources) ;
  • Han, Choon (Department of Chemical Engineering, Kwangwoon University)
  • 임광일 (광운대학교 화학공학과) ;
  • 황인성 (광운대학교 화학공학과) ;
  • 김정운 (광운대학교 화학공학과) ;
  • 유광석 (한국지질자원연구원 광물자원연구본부) ;
  • 안지환 (한국지질자원연구원 광물자원연구본부) ;
  • 한춘 (광운대학교 화학공학과)
  • Received : 2012.06.22
  • Accepted : 2012.09.14
  • Published : 2012.10.30
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Abstract

In this study, the sonication method was applied to remove ink from old newspaper(ONP) using flotation. Results indicated increased whiteness and effective residual ink concentration (ERIC) with longer disintegration. Therefore 58% of whiteness and 182.9 ppm ERIC were obtained for 30 minutes of disintegration time without the change in yield. Longer disintegration than 30 minutes had no effects on whiteness without the application of ultra-sonication. On the other hand, higher than 58% of whiteness was achieved in 2 minutes of disintegration when the ultra-sonication was applied. The highest whiteness (59.32 %) was obtained by applying sonication for 20 minutes and froth flotation with kerosene as a collector under the alkaline condition (pH 11).

재생률이 높은 폐신문지(old newspaper, ONP)를 부유선별법을 이용하여 탈묵을 진행하였을 시, 해리시간, 초음파처리에 따른 백색도, 잔류잉크농도(effective residual ink concentration, ERIC), 수율의 효과를 규명하였다. 또한 부유선별시 pH, 포수제에 따른 백색도, ERIC과 수율의 효과도 규명하였다. 해리시간이 증가할수록 백색도와 ERIC이 증가함을 보였으나 수율의 차이는 없었다. 해리시간이 30분일 때 백색도 58% ERIC 182.9 ppm이였고, 해리를 더 진행하더라도 백색도의 증가를 볼 수 없었다. 단 해리 된 ONP를 초음파발생장치를 이용하여 초음파처리를 했을 경우 단 2분의 해리시간으로도 58%이상의 백색도를 얻을 수 있었다. 초음파처리를 20분간하고, pH 11에서 포수제로 등유을 사용했을 때 백색도가 59.32%로 가장 높았다.

Keywords

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