Characterisation, recovery and activity of hydrophobic compounds in Norway spruce log soaking pit water : could they be used in wood preservative formulations?

Barbero-López, Aitor (author), Vek, Viljem (author), Poljanšek, Ida (author), Virjamo, Virpi (author), López-Gómez, Yeray Manuel (author), Sainio, Tuomo (author), Humar, Miha (author), Oven, Primož (author), Haapala, Antti (author)

Norway spruce log soaking water (SLSW) is considered a waste in the plywood and veneer industry but has not been characterised, and its possible uses remain unexplored. The purpose of this study is to characterise and test the possibility of using SLSW in wood preservative formulations. First, the SLSW was characterised, and the presence of carbohydrates in the log soaking water was reduced with a hydrophobic adsorbent to reduce the nutrient availability for fungi in the liquids. Then, the feasibility of using SLSW and the sugar free SLSW (denoted later as EHC solution) as wood preservatives was studied by testing their antifungal and antioxidant activities and performing a mini-block test against Schizophyllum commune, Trametes versicolor, Fibroporia vaillantii and Gloeophyllum trabeum. Several phenolic compounds were found in the SLSW. This water also had high antioxidant activity at 1000 mg/L before and after carbohydrate removal but no antifungal activity. Its impregnation in wood caused a slight reduction in mass loss of the Pinus sylvestris specimens but had no effect on the Fagus sylvatica specimens when exposed against Schizophyllum commune, Trametes versicolor, Fibroporia vaillantii and Gloeophyllum trabeum. The SLSW as a wood preservative is invalid, even after partial carbohydrate removal. However, due to the presence of wood constituents, SLSW could be a resource for other uses requiring high antioxidant activity but specific applications need further investigation.

• Language: English
• Keywords: log soaking liquid, wood degradation, natural chemicals, biorefning, Pinus sylvestis, Fagus sylvatica
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publication version: Version of Record
• Publication date: 01.01.2022
• Year: 2022
• Number of pages: 12 str.
• Numbering: Vol. 13, iss. 5
• PID: 20.500.12556/RUL-138105
• UDC: 630*8
• ISSN on article: 1877-265X
• DOI: 10.1007/s12649-022-01676-2
• COBISS.SI-ID: 92903683
• Publication date in RUL: 11.07.2022

Record is a part of a journal

• Title: Waste and biomass valorization
• Publisher: Springer Netherlands
• ISSN: 1877-265X
• COBISS.SI-ID: 517646873

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 11.07.2022

Secondary language

• Language: Slovenian
• Keywords: tekočina za namakanje hlodov, ekstraktivi, razgradnja lesa, naravne kemikalije, biorafiniranje

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P4-0015-2020
• Name: Les in lignocelulozni kompoziti

• Funder: Other - Other funder or multiple funders
• Funding programme: Academy of Finland
• Project number: 329884
• Name: Effect of climate change on building design and indoor health/ Consortium: ECOCIDE