Optimization of a Laccase-Mediator Stage for TCF Bleaching of Flax Pulp
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| 024 | 7 | 0 | |a 10.1515/HF.2003.076 |2 doi |
| 035 | |a (NATIONALLICENCE)gruyter-10.1515/HF.2003.076 | ||
| 245 | 0 | 0 | |a Optimization of a Laccase-Mediator Stage for TCF Bleaching of Flax Pulp |h [Elektronische Daten] |c [O. García, S. Camarero, J. F. Colom, Á. T. Martínez, M. J. Martínez, R. Monje, T. Vidal] |
| 520 | 3 | |a Flax pulp obtained by anthraquinone-soda pulping, resulting in a kappa number of 11.1, a viscosity of 950 ml/g and 36.7% ISO brightness, was bleached in a totally chlorine-free sequence using the enzyme laccase from the fungus Pycnoporus cinnabarinus and 1-hydroxybenzotriazole (HBT) as redox mediator (stage L), followed by a hydrogen peroxide stage (P). The laccase treatment was optimized using a three-variable sequential statistical plan over the following ranges: 1-20 U/g o.d.p. (oven-dried pulp) laccase dose, 0.5-7.5% o.d.p. HBT dose and 1-24 h reaction time. The influence of these variables on several pulp properties after the P stage of the LP sequence was examined. The models defined from the results obtained predicted variations in ISO brightness, viscosity and kappa number of 57.6-74.8%,590-955 ml/g and 0-6.2, respectively. The variables most strongly influencing these pulp properties were found to be the reaction time and the enzyme dose. A compromise was adopted as regards the operating conditions in order to ensure optimum results. The study was completed by conducting a biobleaching assay in a pressurized reactor (590 kPa) to assess the effect of oxygen pressure. The high pressure level resulted in improved pulp properties by the laccase-mediator system. | |
| 540 | |a Copyright © 2003 by Walter de Gruyter GmbH & Co. KG | ||
| 690 | 7 | |a Timber & wood processing |2 nationallicence | |
| 690 | 7 | |a Biotechnology |2 nationallicence | |
| 690 | 7 | |a Materials science |2 nationallicence | |
| 700 | 1 | |a García |D O. |4 aut | |
| 700 | 1 | |a Camarero |D S. |4 aut | |
| 700 | 1 | |a Colom |D J. F. |4 aut | |
| 700 | 1 | |a Martínez |D Á. T. |4 aut | |
| 700 | 1 | |a Martínez |D M. J. |4 aut | |
| 700 | 1 | |a Monje |D R. |4 aut | |
| 700 | 1 | |a Vidal |D T. |4 aut | |
| 773 | 0 | |t Holzforschung |d Walter de Gruyter |g 57/5(2003-08-20), 513-519 |x 0018-3830 |q 57:5<513 |1 2003 |2 57 |o hfsg | |
| 856 | 4 | 0 | |u https://doi.org/10.1515/HF.2003.076 |q text/html |z Onlinezugriff via DOI |
| 908 | |D 1 |a research article |2 jats | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1515/HF.2003.076 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a García |D O. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Camarero |D S. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Colom |D J. F. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Martínez |D Á. T. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Martínez |D M. J. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Monje |D R. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Vidal |D T. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Holzforschung |d Walter de Gruyter |g 57/5(2003-08-20), 513-519 |x 0018-3830 |q 57:5<513 |1 2003 |2 57 |o hfsg | ||
| 900 | 7 | |b CC0 |u http://creativecommons.org/publicdomain/zero/1.0 |2 nationallicence | |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-gruyter | ||