Fine dust after sanding untreated and thermally modified spruce, oak, and meranti wood

Sydor, Maciej Fine dust after sanding untreated and thermally modified spruce, oak, and meranti wood / Maciej Sydor, Jerzy Majka ... [et al.]. -- Airborne wood dust poses health and safety risks in the construction and furniture industry. The study verified whether the thermal modification affects the share of fine wood dust particles (< 10 μm) generated during spruce, oak, and meranti wood sanding. The experimental research involved nine material variants, including three wood species in three states: untreated, thermally modified at 160 °C, and thermally modified at 220 °C). To collect at least 200 g of each dust sample, a belt sander with P80 sandpaper and a belt speed of 10 m/s was used, along with a dust collector. The collected dust was then separated into fractions using a set of sieves with aperture sizes of 2000, 1000, 500, 250, and 125 μm. A laser particle sizer was employed to measure the sizes of dust particles in the under-sieve fraction (dust with particle sizes smaller than 125 μm). The under-sieve fraction was decomposed into three subfractions, with particle sizes: <2.5, 2.5-4.0, and 4.0–10 μm. Surprisingly the results indicate that sanding dust from thermally modified wood generates a lower average mass share of potentially harmful fine particle fractions than dust from untreated wood. Oak dust contained a higher mass share of fine particles compared to the spruce and meranti dust samples. Dust from thermally modified oak and meranti wood had a lower content of harmful particle fractions than dust from untreated wood. The average mass shares of these dust fractions for modified wood at 160 and 220 °C showed no statictically significant differences (p < 0.05). Conversely, spruce dust had a low content of fine fractions because spruce particles exhibit a more irregular elongated shape. The study considered the extreme temperatures of 160 and 220 °C used in the thermal modification of wood. Therefore, the above statements are assumed to be valid for all intermediate thermo-modification temperatures.

In European journal of wood and wood products. -- Berlin : Springer-Verlag, 2023. -- ISSN 0018-3768. -- ISSN 1436-736X. -- Vol. 81, no. 6 (2023), pp. 1455-1464

1. drevný prach 2. brúsenie 3. smrekové drevo 4. dubové drevo 5. články

I. Majka, Jerzy
II. Hanincová, Luďka
III. Kučerka, Martin, 1980-
IV. Kminiak, Richard
V. Krišťák, Ľuboš
VI. Pędzik, Marta
VII. Očkajová, Alena, 1961-
VIII. Rogoziński, Tomasz
IX. European journal of wood and wood products. -- Vol. 81, no. 6 (2023), pp. 1455-1464
BB301