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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The Bleaching of Kraft Pulp by Laccase/Mediator System(I) - Screening of mediator for the bleaching of kraft pulp by Trichophyton sp. LKY-7 laccase -

Laccase/mediator system에 의한 크라프트펄프 표백(제1보) - Trichophyton sp. LKY-7 laccase의 크라프트펄프 표백을 위한 mediator 선발 -

  • Jung, Hyun-Chae (College of Agriculture and Life Science, Sunchon National University) ;
  • Park, Seur-Kee (College of Agriculture and Life Science, Sunchon National University) ;
  • Kim, Hoon (College of Agriculture and Life Science, Sunchon National University)
  • 정현채 (순천대학교 농업생명과학대학) ;
  • 박서기 (순천대학교 농업생명과학대학) ;
  • 김훈 (순천대학교 농업생명과학대학)
  • Published : 2006.09.30
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Abstract

The analogs of cyclic hydroxamic acids containing N-OH group have been proposed to play effective laccase-mediators in kraft pulp bleaching with laccase/mediator system. The existing mediators (NHA, 1-HBT, VA), the best laccase-mediators reported so far, and selected several analogs of cyclic hydroxamic acids were evaluated as a laccase-mediator for kraft pulp bleaching. It was found that NHA was the most effective mediator for the Trychophyton sp. LKY-7 laccase (TrL) in kraft pulp bleaching with TrL/mediator system, increasing about 10% ISO of brightness and decreasing about 2.8 of kappa number after alkaline-peroxide bleaching. Of the cyclic hydroxamic acidstested, the NHP.1(N-hydroxypyridone analog) was shown to enable TrL to effectively degrade lignin in kraft pulp bleaching, demonstrating approximately similar effect with that of NHA. However, the effect of substituent patterns of cyclic hydroxamic acid analogs in kraft pulp bleaching was not observed. The inhibitions of NHA and NHP.1 on TrL were not exhibited in TrL/mediator system. As a new mediator for TrL, NHP.1 was considered to be able to use in kraft pulp bleaching with TrL/mediator system.

Keywords

References

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