WOOD RESEARCH Volume 70, Number 3, 2025
DONATA KRUTUL, ANDRZEJ ANTCZAK, MICHAŁ DROŻDŻEK, MONIKA MARCHWICKA, ANDRZEJ RADOMSKI, Teresa Kłosińska, and JANUSZ ZAWADZKI

Influence of urban agglomeration environment pollution on the concentration of some non-metals in the trunk of Acer platanoides L.

The influence of environmental pollution on the concentration of some non-metals in wood and bark from trunks of Acer platanoides L. obtained from the crossroads of Platynowa and Towarowa Streets and KrakowskiePrzedmieście Street in Warsaw was observed. Samples were collected from approx. 30-year-old and 40 year-old trees from the butt-end and the mid-height of the trunk part as well as from the top part. On the cross-section of the butt-end and the mid-height, the following sections were distinguished: outer, middle and pith adjacent middle wood and of the butt-end part bark was obtained. The discs from the upper part of the trunks were not divided into sections due to their small diameter. The concentrations of chlorine (Cl-), nitrate (NO3-), sulphate (SO4-) and hydro phosphate (HPO42-) anions were determined using HPLC with a conductometric detector. The content of nitrogen (N) was examined with the Kjeldahl method. The influence of the environmental pollution caused by urban agglomeration on the nitrogen content was denoted. Additionally, chlorine anions concentrations in wood and bark were increased.

WOOD RESEARCH Volume 66, Number 2, 2021
DONATA KRUTUL, ANDRZEJ RADOMSKI, ANDRZEJ ANTCZAK, MICHAŁ DROŻDŻEK, Teresa Kłosińska, Dominika Szadkowska, and JANUSZ ZAWADZKI

Influence of the environmental pollution on the distribution and polymerization degree of cellulose in bark and wood from scots pine (Pinus Sylvestris L.) stem

The pine stems were cut from three different polluted environments – Ist trees degradation degree (weak pollution), IInd trees degradation degree (strong pollution) and IIIrd trees degradation degree (connected with very strong pollution). On the basis of obtained results it was stated that environmental pollution caused changes in late wood participation, as well as distribution of cellulose on the stem cross- and longitudinal section. It also changed cellulose content in bark from the butt-end section, which was about 26% regardless the degradation degree. The environmental pollution caused also an increase of viscometric average polymerization degree of cellulose in heartwood in relation to heartwood adjacent sapwood and sapwood from butt-end section. Regardless the degradation degree, cellulose polymerization degree in heartwood adjacent sapwood from the middle part of the stem was higher in comparison to sapwood and heartwood. Moreover, the environmental pollution caused the increase of viscometric average polymerization degree of cellulose in bark. The polymerization degree of cellulose in bark from the butt-end section of IIIrd degradation degree stems was 22% and 23% higher in comparison to the Ist and IInd degradation degree.