华南理工大学学报(自然科学版) ›› 2004, Vol. 32 ›› Issue (7): 41-46.

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荻苇硫酸盐浆漆酶/介体体系生物漂白

何为1 詹怀宇1 陈礼辉2   

  1. 1.华南理工大学 制浆造纸工程国家重点实验室‚广东 广州510640; 2.福建农林大学 材料工程学院‚福建 南平353001
  • 收稿日期:2003-11-07 出版日期:2004-07-20 发布日期:2015-09-09
  • 通信作者: 何为(1973-)‚男‚博士生‚主要从事制浆化学和生物化学的研究. E-mail:action-he@263.net
  • 作者简介:何为(1973-)‚男‚博士生‚主要从事制浆化学和生物化学的研究.
  • 基金资助:
    国家自然科学基金资助项目(20176015);广东 省自然科学基金资助项目(31427) 

Biobleaching of Reed Kraft Pulp with Laccase-mediator System

He Wei1 Zhan Hua-i yu1 Chen L-i hui2   

  1. 1.State Key Lab of Pulp &Paper Engineering‚South China Univ.of Tech.‚Guangzhou510640‚Guangdong‚China; 2.College of Material Engineering‚Fujian Univ.of Agriculture and Forestry‚Nanping353001‚Fujian‚China
  • Received:2003-11-07 Online:2004-07-20 Published:2015-09-09
  • Contact: 何为(1973-)‚男‚博士生‚主要从事制浆化学和生物化学的研究. E-mail:action-he@263.net
  • About author:何为(1973-)‚男‚博士生‚主要从事制浆化学和生物化学的研究.

摘要: 以1-羟基苯并三唑(HBT)为漆酶(EC1.10.3.2)A 和漆酶 B 的氧化还原介体构 建漆酶/介体体系(Laccase/Mediator System‚简称 LMS)‚用 LMS 生物漂白荻苇硫酸盐浆‚ 再经碱处理后测定纸浆的卡伯值和粘度值.测定结果证实了 LMS 生物漂白具有极好的选 择性‚LMSB 比 LMSA 具有更好的脱木素效果.由漆酶 A、B 的紫外-可见光谱分析得知‚ LMSB 比 LMSA 具有更好的脱木素作用可能是由于每个漆酶 B 分子含有的芳香族氨基酸 比每个漆酶 A 的少‚漆酶 B 与1-羟基苯并三唑自由基(HBT·)的反应程度较低‚有利于 HBT·与浆中残余木素的反应. 

关键词: 漆酶/介体体系, 荻苇硫酸盐浆, 脱木素, 生物漂白

Abstract: Two laccase-mediator systems(LMSA and LMSB) respectively consisted of laccase(EC1.10.3.2) A as well as laccase B and their mediator of1-hydroxybenzotriazole(HBT) were used to biobleach reed kraft pulp which was then extracted with soda.Kappa number and viscosity of the bleached pulps were determined.The results confirm that the LMS biobleaching exhibits excellent delignification selectivity.Higher level of delignification was obtained in LMSB stage than in LMSA stage.UV-Vis absorption spectra of laccases A and B reveal that laccase B contains less aromatic amino acid residues than laccase A does‚which makes laccase B less vulnerable to HBT·attack.So the reaction between HBT·and the residual lignin in LMSB biobleaching becomes easier.This is the reason for the more excellent delignification efficiency of LMSB compared to LMSA. 

Key words: laccase-mediator system, reed kraft pulp, delignification, biobleaching

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