Effect of oxidising and reducing agents on the release of volatile organic compounds (VOCs) from strands made of Scots pine (Pinus sylvestris L.)

Abstract

Study of the influence of treating pine wood strands with hydrogen peroxide as an oxidising agent and sodium sulphite as a reducing agent on the emission of volatile organic compounds revealed that hydrogen peroxide increases the emission of aliphatic aldehydes (e.g. hexanal) and reduces the emission of monoterpene compounds (like -pinene). Sodium sulphite as a reducing agent decimated the emission of monoterpene compounds without noticeably affecting the emission of volatile aldehydes

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

“…069; 93.070; 153.127; 137.132; 205.195) was higher in softwoods (Cedrus, Pinus, and Cupressus) in comparison with most hardwood species (Fig. 3), with terpene compounds being the essential part of the resin composition in many softwood species (Risholm-Sundman et al 1998, Baumann et al 1999, Schumann et al 2012, Roffael et al 2015. The only exception was represented by Bay laurel (Laurus nobilis) that showed similar peak intensities for the masses regarding terpenes, due to the richness of such compounds in this species (e.g., oxygenated monoterpenes and monoterpene hydrocarbons - Flamini et al 2007).…”

“…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.…”

“…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. VOCs from wood can originate either from compounds present in the native structure of wood, or through different chemical processes, such as oxidation and hydrolysis, that involve wood components (Roffael et al 2015). In general, the most common VOCs emitted from wood are terpenes, aliphatic aldehydes, and organic acids (Schumann et al 2012).…”

“…Previous studies have already dealt with products that derived from the degradation of wood polysaccharide fraction, after specific treatments or processing procedures of wood, showing the formation of compounds such as: (1) formaldehyde, acetaldehyde, propenal, butanal, and butanone resulting from the breakdown of the polysaccharide fraction of the wood during pyrolysis (Salem & Böhm 2013); (2) acetic acid following acetyl group hydrolysis in hemicellulose (Risholm-Sundman et al 1998); (3) pentanal, hexanal, and other aldehydes resulting from the oxidation of unsaturated fatty acids of triglycerides (Risholm-Sundman et al 1998); (4) furfural due to hydrolysis of carbohydrates (Roffael et al 2015); and (5) furan and furan derivatives as thermal degradation products of cellulose and other polysaccharides (Manninen et al 2002, Fernández de Simón et al 2009). …”

Comparison on Reduction of VOCs Emissions from Radiata Pine (Pinus Radiata D. Don) between Sodium Bicarbonate and Ozone Treatments

“…In addition, oxidants can be used to simply and efficiently treat wood extracts and remove VOCs. Studies have shown that removing VOCs from pine wood with hydrogen peroxide as an oxidant can reduce the emission of monoterpenes [25]. As a type of oxidant, ozone can effectively reduce the TVOC concentration of sewage [26] and promote the photodegradation of VOCs in the atmosphere [27].…”