Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Fundamental Study on Developing the Technology for the Removal of Fluorescent Whitening Agents from the Process Water

공정수에 존재하는 형광증백제의 제거 기술에 대한 기초연구

  • Lee, Ji-Young (Dept. of Forest Products/IALS, Gyeongsang National Univ.) ;
  • Youn, Hye-Jung (Dept. of Forest Science, College of Agriculture and Life Sciences, Seoul National Univ.) ;
  • Lee, Hak-Lae (Dept. of Forest Science, College of Agriculture and Life Sciences, Seoul National Univ.)
  • 이지영 (경상대학교 임산공학과/농업생명과학연구원) ;
  • 윤혜정 (서울대학교 농업생명과학대학 산림과학부) ;
  • 이학래 (서울대학교 농업생명과학대학 산림과학부)
  • Published : 2009.03.31
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Abstract

The use of fluorescent whitening agents (FWAs) increases as the demand for the whiter and brighter printing papers increases. FWAs are used as internal and surface treatment chemicals. FWAs that are not used properly in the papermaking process, however, remain in the process water and may demage the paper quality and processes. In this study, a new idea to eliminate FWAs from the process water, consisted of the floc formation of FWAs with cationic chemicals, such as cationic polyelectrolytes and alum, and the removal of the floc by screening or sedimentation, was proposed. Flocculation of FWAs, that is the first step to remove FWAs from the process water, was investigated using turbidity and particle size measurement. Relationship between turbidity and particle size showed that the turbidity could reflect the particle size change of FWA flocs and was proper for the evaluation of flocculation phenomena. Poly-DADMAC was more efficient than PEI to induce the flocculation of FWAs. Alum was effective chemical for the flocculation and sedimentation of FWAs.

Keywords

References

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