Rock raw material exploitation has been of long tradition in Poland. However, due to alkalization, the intensification of changes that began more than 30 years ago should be associated with the localization of cement plants, lime plants and aggregate plants in this area. Cement dust entering the soil in large quantities causes increasing of CaCO 3 concentration in the horizons, which evokes a series of the consequences in phytocenoses (BOROWIEC, ZABŁOCKI 1983;DALE, BALL 1991; BRÓŻ et al. 1992;KREUTZER 1995;ŚWIERCZ 1997). Especially susceptible to slight changes are the oligotrophic gatherings of pine forests. The range of alkali deposit impact depends on the source and type of emission, the distance from the emitters, the orography of the area, frequency and direction of winds, among others (DAMME, ERNST 1989;SPOREK 1995;ŚWIERCZ 1997).The aim of this paper is to: -check the suitability of pine bark to indicate the degree of air pollution caused by cement-lime dusts,-define the range of a cement plant impact in connection with the results obtained by SPOREK (1995) in the Opole forests. Pine bark was analyzed in the forests located at three cement plants in the Świętokrzyski province (South Poland).
MATERIAL AND METHODSThe testing data were collected from the pine forests located in the Świętokrzyski province. The forested areas tested are located in proximity of three cement plants and the control one in Wymysłów, located outside the impact of alkali dust emissions.In total 310 bark samples were collected from the trees at the breast height diameter.The bark in question was removed by means of a bark knife. The pine bark was dried in room temperature, then it was rinsed with water and dried again (approximately 40°C) for 24 hours. The dried material was milled into dust powder in a Fritsch mill.
Suitability of pine bark to evaluate pollution caused by cement-lime dust
A. ŚWIERCZ
Institute of Geography, Pedagogical Academy, Kielce, PolandABSTRACT: The aim of this paper is to show the application of pine bark to indicate the level of air contamination by cement-lime dust and to determine the impact range of cement plants. The pine bark was analyzed in the forested formed around three cement plants in the Świętokrzyski administrative district (South of Poland). The test results were compared with the results gained from the controlled forested areas, free from alkali contamination. The strongly alkali areas show high pH H 2 O of bark in the range of 7.2-8.5 and low coefficient of change v% = 2.2. The pine bark values of pH H 2 O in the alkali areas are on average 2.5 times as high as those achieved in the controlled area (natural pH of bark shows the range of 2.8-3.5). On the basis of the measurements of pH H 2 O there are five alkali-forested spheres determined. The existence of the forest spheres confirms the variable mineral composition of the bark, and first of all the variable content of calcium, magnesium, potassium, aluminium, manganese, zinc and iron as a function of the distance from the emitter and real ...