Product emissions of volatile organic compounds from convection dried Norway spruce (<i>Picea abies</i>(L.) H. Karst.) timber

Steckel, Vera; Welling, Johannes; Ohlmeyer, Martin

doi:10.1179/2042645311y.0000000007

Cited by 10 publications

(11 citation statements)

References 7 publications

(8 reference statements)

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“…On successive days, until the end of the test (i.e., the 28th day), the ratio of concentrations of terpenes emitted from the two zones of the cross-section remained at a similar level; i.e., it was approximately two times higher for sapwood compared to heartwood. Similar values of concentrations of terpenes emitted from Norway spruce heartwood and sapwood after 3, 7, 14 and 28 days of exposure were observed by Steckel et al [52]. After 3 days, terpene emission was approximately 2129 µg/m 3 from Norway spruce sapwood and approximately 567 µg/m 3 from heartwood, while only after 28 days did the emissions decrease to a level of approximately 524 µg/m 3 and 219 µg/m 3 , respectively, for sapwood and heartwood.…”

Section: Resultssupporting

confidence: 88%

“…Roffael [28] also indicated that in pine wood, the emissions of terpenes from the heartwood zone of the trunk are several times higher than those from the sapwood zone, while in Norway spruce wood, the emissions from these zones of the cross-section are the opposite. Higher emissions of VOC from Norway spruce sapwood, compared to heartwood, were also observed by Steckel et al [52]. After 3 days of exposure, the emissions differed four-fold, and after 28 days, they differed 2.6 fold; however, these emission levels were much lower than those observed in the present study, probably owing to the fact that we analyzed TVOC from fresh wood, while the cited authors, in their study, used wood which had been convectively dried in a dryer.…”

Section: Resultssupporting

confidence: 75%

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Emission of Volatile Organic Compounds from Heartwood and Sapwood of Selected Coniferous Species

Czajka

Fabisiak

2020

Forests

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The qualitative and quantitative composition of volatile organic compounds (VOC) emitted from furnishings from solid wood and all kinds of wood derivative materials depends on many factors, of which the most important is the wood species. The intraspecies and interspecies differences in VOC emission result from the differences in the chemical composition and anatomical structure of heartwood and sapwood of different species. VOC composition analysis was performed separately for heartwood and sapwood of Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) Karst.) and European larch (Larix decidua Mill.) trees. The studies were conducted in a glass climatic chamber of 0.025 m3, equipped with a system for the monitoring and control of climatic conditions. Samples of air for analyses were collected after 3, 7, 14 and 28 days of exposure. The results provided evidence for interspecies and intraspecies differences in the qualitative and quantitative compositions of VOC. The concentration of total VOC (TVOC) released from heartwood of Scots pine was higher than that released from sapwood. For European larch and Norway spruce, the opposite relations were observed. The VOC emission from Scots pine heartwood was about 17 times higher than the emission from European larch and Norway spruce heartwood. The differences in TVOC emitted from the sapwood of samples from different species were smaller. For each of the species, the highest percentage contribution to TVOC was made by terpenes. The second highest percentage contribution in TVOC was made by compounds containing a carbonyl group, mainly aldehydes, while aromatic compounds made the third highest contribution.

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Section: Resultssupporting

confidence: 88%

Section: Resultssupporting

confidence: 75%

Emission of Volatile Organic Compounds from Heartwood and Sapwood of Selected Coniferous Species

Czajka

Fabisiak

2020

Forests

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“…Terpenes and acids are strongly dependent on wood species, while formaldehyde is mainly related to the adhesive. Other aldehydes are formed under certain conditions by autoxidative splitting of free unsaturated fatty acids and triglycerides (Makowski and Ohlmeyer 2006a;Fischer and Aehlig 2007;Steckel et al 2010). and Makowski and Ohlmeyer (2006a) observed an increase in aldehydes emission during the first days, followed by a decrease in the last week.…”

Section: Introductionmentioning

confidence: 99%

The influence of scavengers on VOC emissions in particleboards made from pine and poplar

Costa

Ohlmeyer

Ferra³

et al. 2013

Eur. J. Wood Prod.

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This paper studies the performance of scavengers on Volatile Organic Compound (VOC) emissions from wood-based composites. Particleboards made from maritime pine (Pinus Pinaster Ait.) and European poplar (Populus spp.) were produced with a UF resin doped with melamine and two scavengers, sodium metabisulfite and urea. VOC emission was measured according to EN ISO 16000. Particleboards made from pine present much higher total VOC (TVOC) emissions than boards made from poplar. Pine emits a higher amount of terpenes, but also aldehydes, acids and terpenoids, while poplar emits mainly acetic acid. Sodium metabisulfite showed an excellent ability to reduce aldehydes emission, which represents nearly 50 % of total emission of particleboards made from pine. When sodium metabisulfite was applied to particleboards made from poplar, reduction of TVOCs was not significant due to the low contribution of aldehydes to TVOCs. Urea presents a low reduction in TVOCs for both wood species.2

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“…VOC emissions are also present in wood, and they are dependent upon many factors including species, age, and pH value; these emissions differ significantly between hardwoods and softwoods (Taiti et al 2016, Roffael et al 2015, Steckel et al 2010, Roffael 2006). Specifically, Fengel & Wegener (1989) reported that softwood polyoses contain higher amounts of mannose and galactose than hardwoods, whereas hardwoods are richer in pentoses, characterized by higher amounts of acetyl groups.…”

Section: Introductionmentioning

confidence: 99%

Characterization of VOC emission profile of different wood species during moisture cycles

Sassoli¹,

Taiti²,

Nissim³

et al. 2017

iForest

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This study addresses the characterization of volatile organic compounds (VOCs) emitted by samples of 13 different wood species, belonging to both softwoods and hardwoods groups, regularly measured at different intervals of time, after the first measurement on green wood. The same wood specimens were subjected to several cycles of water desorption and adsorption, assuming that moisture variation might play a role in both the formation and emission of VOCs. Proton Transfer Reaction-Time of Flight-Mass Spectrometry (PTR-TOF-MS) was used as a tool to characterize the emission of VOCs. Coupled with a multivariate class-modelling approach, this tool was able to discriminate between groups (softwood and hardwood) and in some cases between different species. However, results showed that the discriminant capacity of VOCs emission to separate species and families rapidly decreases after the first cycles of moisture variation in wood. The green wood was characterized by a richness of volatile compounds, whereas, after only the first dry cycle, wood emitted a more restricted group of compounds. We hypothesized that most of these VOCs might have originated from structural changes and degradation processes that involve the main polymers (particularly hemicellulose) constituting the cell wall of wooden cells. The results obtained are in agreement with the physical and chemical modification processes that characterize wood ageing.

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Product emissions of volatile organic compounds from convection dried Norway spruce (Picea abies(L.) H. Karst.) timber

Cited by 10 publications

References 7 publications

Emission of Volatile Organic Compounds from Heartwood and Sapwood of Selected Coniferous Species

Emission of Volatile Organic Compounds from Heartwood and Sapwood of Selected Coniferous Species

The influence of scavengers on VOC emissions in particleboards made from pine and poplar

Characterization of VOC emission profile of different wood species during moisture cycles

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