Reducing the content of VOCs of softwood kraft lignins for material applications

Anna Kalliola, Anne Savolainen, Taina Ohra-aho, Greta Faccio, Tarja Tamminen

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

Three laccases, functioning in mild acidic, and one in slightly alkaline conditions, were evaluated in order to reduce low-molecular phenolic VOCs of kraft lignins, which could be used in lignin/natural fibers composites. The potential of a sulfhydryl oxidase to catalyze the oxidation of sulfur containing VOCs (thiols) was also tested in combination with the laccase-catalyzed oxidation. In addition, oxidation at alkaline pH at room temperature that may induce polymerization of phenolics in an analogous manner to the laccase-catalyzed reaction was investigated. Enzyme reactivity towards lignin was evaluated as consumption of oxygen in the reaction solution. The effect of treatments on VOC reduction was determined both by sensing (odorimetry) and chemical (TD-GC/MS, SEC) analyses. Laccases, Lcc2, and MaL from Thielavia arenaria and Melanocarpus albomyces, respectively, showed potential in reducing odors. The most promising results were obtained by oxidizing lignin with O2 at alkaline pH. However, the odor threshold values of the main VOC compounds are extremely low, which poses a challenge to VOC reduction.
Original languageEnglish
Pages (from-to)2871-2882
Number of pages11
JournalBioResources
Volume7
Issue number3
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Fingerprint

Softwoods
Laccase
Lignin
Volatile organic compounds
lignin
volatile organic compound
Odors
oxidation
Oxidation
odor
Natural fibers
thiol
Sulfur
Sulfhydryl Compounds
polymerization
Enzymes
Polymerization
sulfur
Kraft lignin
material

Keywords

  • VOC
  • kraft lignin
  • composite
  • laccase
  • sulfhydryl oxidase
  • oxygen
  • oxidation

Cite this

@article{154bfff3d2ca49f6a34442ef082c5a00,
title = "Reducing the content of VOCs of softwood kraft lignins for material applications",
abstract = "Three laccases, functioning in mild acidic, and one in slightly alkaline conditions, were evaluated in order to reduce low-molecular phenolic VOCs of kraft lignins, which could be used in lignin/natural fibers composites. The potential of a sulfhydryl oxidase to catalyze the oxidation of sulfur containing VOCs (thiols) was also tested in combination with the laccase-catalyzed oxidation. In addition, oxidation at alkaline pH at room temperature that may induce polymerization of phenolics in an analogous manner to the laccase-catalyzed reaction was investigated. Enzyme reactivity towards lignin was evaluated as consumption of oxygen in the reaction solution. The effect of treatments on VOC reduction was determined both by sensing (odorimetry) and chemical (TD-GC/MS, SEC) analyses. Laccases, Lcc2, and MaL from Thielavia arenaria and Melanocarpus albomyces, respectively, showed potential in reducing odors. The most promising results were obtained by oxidizing lignin with O2 at alkaline pH. However, the odor threshold values of the main VOC compounds are extremely low, which poses a challenge to VOC reduction.",
keywords = "VOC, kraft lignin, composite, laccase, sulfhydryl oxidase, oxygen, oxidation",
author = "Anna Kalliola and Anne Savolainen and Taina Ohra-aho and Greta Faccio and Tarja Tamminen",
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language = "English",
volume = "7",
pages = "2871--2882",
journal = "BioResources",
issn = "1930-2126",
publisher = "North Carolina State University",
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Reducing the content of VOCs of softwood kraft lignins for material applications. / Kalliola, Anna; Savolainen, Anne; Ohra-aho, Taina; Faccio, Greta; Tamminen, Tarja.

In: BioResources, Vol. 7, No. 3, 2012, p. 2871-2882.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Reducing the content of VOCs of softwood kraft lignins for material applications

AU - Kalliola, Anna

AU - Savolainen, Anne

AU - Ohra-aho, Taina

AU - Faccio, Greta

AU - Tamminen, Tarja

PY - 2012

Y1 - 2012

N2 - Three laccases, functioning in mild acidic, and one in slightly alkaline conditions, were evaluated in order to reduce low-molecular phenolic VOCs of kraft lignins, which could be used in lignin/natural fibers composites. The potential of a sulfhydryl oxidase to catalyze the oxidation of sulfur containing VOCs (thiols) was also tested in combination with the laccase-catalyzed oxidation. In addition, oxidation at alkaline pH at room temperature that may induce polymerization of phenolics in an analogous manner to the laccase-catalyzed reaction was investigated. Enzyme reactivity towards lignin was evaluated as consumption of oxygen in the reaction solution. The effect of treatments on VOC reduction was determined both by sensing (odorimetry) and chemical (TD-GC/MS, SEC) analyses. Laccases, Lcc2, and MaL from Thielavia arenaria and Melanocarpus albomyces, respectively, showed potential in reducing odors. The most promising results were obtained by oxidizing lignin with O2 at alkaline pH. However, the odor threshold values of the main VOC compounds are extremely low, which poses a challenge to VOC reduction.

AB - Three laccases, functioning in mild acidic, and one in slightly alkaline conditions, were evaluated in order to reduce low-molecular phenolic VOCs of kraft lignins, which could be used in lignin/natural fibers composites. The potential of a sulfhydryl oxidase to catalyze the oxidation of sulfur containing VOCs (thiols) was also tested in combination with the laccase-catalyzed oxidation. In addition, oxidation at alkaline pH at room temperature that may induce polymerization of phenolics in an analogous manner to the laccase-catalyzed reaction was investigated. Enzyme reactivity towards lignin was evaluated as consumption of oxygen in the reaction solution. The effect of treatments on VOC reduction was determined both by sensing (odorimetry) and chemical (TD-GC/MS, SEC) analyses. Laccases, Lcc2, and MaL from Thielavia arenaria and Melanocarpus albomyces, respectively, showed potential in reducing odors. The most promising results were obtained by oxidizing lignin with O2 at alkaline pH. However, the odor threshold values of the main VOC compounds are extremely low, which poses a challenge to VOC reduction.

KW - VOC

KW - kraft lignin

KW - composite

KW - laccase

KW - sulfhydryl oxidase

KW - oxygen

KW - oxidation

M3 - Article

VL - 7

SP - 2871

EP - 2882

JO - BioResources

JF - BioResources

SN - 1930-2126

IS - 3

ER -