Jump to ContentJump to Main Navigation
Show Summary Details

Rio, Jose C. / Laine, Christiane / Potthast, Antje / Takano, Toshiyuki / Theliander, Hans

Holzforschung

International Journal of the Biology, Chemistry, Physics, and Technology of Wood

Editor-in-Chief: Faix, Oskar

Editorial Board Member: Daniel, Geoffrey / Militz, Holger / Rosenau, Thomas / Salmen, Lennart / Sixta, Herbert / Vuorinen, Tapani / Argyropoulos, Dimitris S. / Balakshin, Yu / Barnett, J. R. / Burgert, Ingo / Evans, Robert / Evtuguin, Dmitry V. / Frazier, Charles E. / Fukushima, Kazuhiko / Gindl-Altmutter, Wolfgang / Glasser, W. G. / Holmbom, Bjarne / Isogai, Akira / Kadla, John F. / Koch, Gerald / Lachenal, Dominique / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Sipilä, Jussi / Tamminen, Tarja / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi

12 Issues per year


IMPACT FACTOR increased in 2015: 1.711
5-year IMPACT FACTOR: 1.794
Rank 3 out of 21 in category Materials Science, Paper & Wood and 14 out of 66 in Forestry in the 2015 Thomson Reuters Journal Citation Report/Science Edition

SCImago Journal Rank (SJR) 2015: 0.817
Source Normalized Impact per Paper (SNIP) 2015: 0.954
Impact per Publication (IPP) 2015: 1.427

Online
ISSN
1437-434X
See all formats and pricing

 


Select Volume and Issue

Issues

Biobleaching of Pulp with Dioxygen in the Laccase-Mediator System. Part 1. Kinetics of Delignification

Mikhail Balakshin / Chen-Loung Chen / Josef S. Gratzl / Adrianna G. Kirkman / Harald Jakob
Published Online: 2005-06-01 | DOI: https://doi.org/10.1515/HF.2000.066

Summary

Kinetics of pine kraft-AQ pulp delignification with the laccase-mediator system (LMS) and the effects of variable factors on the delignification were studied. The delignification was conducted in acetate buffer solution at pH 4.5 and at 40°C under atmospheric pressure. Only a part of the residual lignin could be removed in one-stage processes. Kinetics of kappa number reduction follows a pseudo-second order rate law with pulp consistency of 10 %, mediator charge of 0.1 mmole HOBT/g pulp and laccase charage of 10 U Coriolus laccase/g pulp. Kinetics of dioxygen uptake follows a pseudo-first order rate law up to first 8 hours of the reaction and a pseudo-zero order rate law at the reaction time of 8–24 hours. The amounts of dioxygen consumed per removal of one C9-unit equivalent of residual lignin is rather high, 1.5–2.5 mole, and increases with increasing reaction time. Experimental data show that side reactions between the Laccase-Mediator System and products of oxidative degradation of lignin strongly inhibit the delignification either by chemical or physical means or both. Removal of the degraded lignin fragments by alkaline extraction effectively restores the delignification of pulp with LMS. A four-stage process consisting of consecutive treatment of pulp with dioxygen-laccase-HOBT (LMS) followed by alkaline extraction (E), (LMS-E)4, decreased kappa number of a pine kraft-AQ pulp from 21.8 to less than 5. On the basis of the kinetic data, the mechanism of the pulp delignification with LMS is discussed.


Published Online: 2005-06-01

Published in Print: 2000-07-04


Citation Information: Holzforschung. Volume 54, Issue 4, Pages 390–396, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/HF.2000.066, June 2005

Citing Articles

Here you can find all Crossref-listed publications in which this article is cited. If you would like to receive automatic email messages as soon as this article is cited in other publications, simply activate the “Citation Alert” on the top of this page.

[1]
Mikhail Balakshin, Chen-Loung Chen, Josef S Gratzl, Adrianna G Kirkman, and Harald Jakob
Journal of Molecular Catalysis B: Enzymatic, 2001, Volume 16, Number 3-4, Page 205
[2]
Susana Camarero, Olga Garcı́a, Teresa Vidal, José Colom, José C del Rı́o, Ana Gutiérrez, José M Gras, Rebeca Monje, Marı́a J Martı́nez, and Ángel T Martı́nez
Enzyme and Microbial Technology, 2004, Volume 35, Number 2-3, Page 113
[3]
Pratima Bajpai
Critical Reviews in Biotechnology, 2004, Volume 24, Number 1, Page 1
[4]
O. García, S. Camarero, J. F. Colom, Á. T. Martínez, M. J. Martínez, R. Monje, and T. Vidal
Holzforschung, 2003, Volume 57, Number 5
[5]
Dominic Rochefort, Robert Bourbonnais, Dónal Leech, Sylvie Renaud, and Michael Paice
Journal of The Electrochemical Society, 2002, Volume 149, Number 1, Page D15
[6]
Katrin Manda, Dirk Gördes, Annett Mikolasch, Elke Hammer, Enrico Schmidt, Kerstin Thurow, and Frieder Schauer
Applied Microbiology and Biotechnology, 2007, Volume 76, Number 2, Page 407
[7]
David Ibarra, Susana Camarero, Javier Romero, María Jesús Martínez, and Angel T Martínez
Journal of Chemical Technology & Biotechnology, 2006, Volume 81, Number 7, Page 1159

Comments (0)

Please log in or register to comment.