Horseradish Peroxidase와 라디칼 전달체를 이용한 Kraft 펄프의 표백

Enzymatic Bleaching of Kraft-pulp with Horseradish Peroxidase and Radical Mediator

  • 류근갑 (울산대학교 화학공학부) ;
  • 권오열 (서울산업대학교 환경공학부)
  • 발행 : 2001.04.01

초록

Horseradish peroxidase(HRP) 및 $H_2O_2$. 와 함께 2, $2^+$-azinobis (3-ethylbenzthiazoline-6-sulfonic acid)(ABTS)블 라디 칼 전달체로서 사용하면 kraft 펄프의 표백효율이 증가하였다. 이때 반 응에 사용할 수 있논 $H_2O_2$의 농도는 약 20 mM까지 증가시킬 수 있었다 Kraft 펄프의 표백효율은 효소의 사용량을 0 0.3 mg/90 mL 까지, ABTS의 농도를 2 mM 까지 높일수록 증가하였으나 이후에는 더 이상 증가하지 않았다. 또한 HRP 에 의한 펄프표백 효율은 효소의 활성 및 펄프에의 홉착강도 와 멸접한 관련이 있었다. HRP의 활성과 kraft 펼프의 표백 효율은 pH 7에서 가장 높았으며 산성용액과 암쌀려성 용액 에서는 강소하였다. 또한 HRP의 펄프홉착 강도는 pH 6-8에 서 가장 낮았고 산성용액(pH 5) 및 알칼리성 용액(pH 9)에서 가장 높았다 펼프의 주요구성 성분인 결정형 셀룰로즈와 려 그닌 중 려그년에 대한 효소의 흡착강도가 더욱 높았다.

The use of 2,2-azinobis(3-ethylbenzthiazoline-6-sulfonic acid)(ABTS) as a radical mediator enhanced the bleaching efficiency of kraft pulp by horseradish peroxidase(HRP) and $H_2O_2$. High concentrations of up to 20 mM $H_2O_2$. were used. The bleaching of the kraft pulp increased as the amount of HRP and ABTS concentration were inceased up to 0.3 mg/90 mL and 2 mM, respectively. The bleaching of the kraft pulp was closely related with the HRPs activity and its adsorption onto the pulp. The activity of HRP and bleaching of kraft pulp were maximum at pH 7 and were reduced either in a acidic or alkaline solutions. The adsorption of HRP onto pulp was low in solutions of pH 6-8 and high in an acidic(pH5) and an alkaline solutions(pH 9). The adsorption of the enzyme was greater for alkali-lignin than for crystalline cellulose, the two major components of pulp.

키워드

참고문헌

  1. C & E News v.17 Concerns broaden over a chlorine and chlorinated hydrocarbons Hileman, B.
  2. Process Biochemistry v.27 Biobleaching of kraft pulp Bajpai, P;P. K. Bajpai
  3. Tappi J. v.77 no.6 The use of xylanases in kraft pulp bleaching: a review Daneault, C.;C. Leduc;J. L. Valade
  4. Tappi J. v.78 no.9 Bleaching kraft pulps with oxidative enzymes and alkaline hydrogen peroxide Paice, M. G.;R. Bourbonnai;I. D. Reid
  5. J. Biotechnol. v.30 Concluding remarks: Where do we stand and where are we going? Lignin biodegradation and practical utilization Eriksson, K. E. L.
  6. FEBS Lett. v.195 no.1-2 Veratryl alcohol as a mediator and the role of radical cations in lignin biodegradation by Phanerochaete chrysosporium Harvey, P. J.;H. E. Schoemaker;J. M. Palmer
  7. FEBS Lett. v.267 no.1 Oxidation of non-phenolic substrates. An expanded role for laccase in lignin biodegradation Bourbonnais, R.;M. G. Paice
  8. Appl. Microbiol. Biotechnol. v.36 Dermethylation and delignification of kraft pulp by Tranmetes versicolor laccase in the presence of 2,2-azinobis-(3-ethylbenthiazoline-6-sulphonate) Bourbonnais, R.;M. G. Paice
  9. Korean J. Biotechnol Bioeng v.10 no.2 The effect of radical carriers on the enzymatic bleaching of kraft pulp Ryu, K.
  10. Hwahak Konghak v.34 no.6 Enhancement of the bleaching efficiency of kraft pulp by enzymatic pretreatments Ryu, K.;S. Rho
  11. Biochemistry v.36 no.1 Roles of efficient substrates in enhancement of peroxidasecatalyzed oxidations Goodwin, D. C.;T. A. Grover;S. D. Aust
  12. Biotechnol. Lett. v.20 no.10 Adsorption of a xylanase purified from pulpzyme HC onto alkali-lignin and crystalline cellulose Ryu, K.;Y. Kim