Skład chemiczny wód porowych górnoplejstoceńskiej sekwencji lessowo-glebowej w Zaprężynie (SW Polska)

The article presents the preliminary results of pore-water chemistry studies of the entire Upper Pleistocene loess-paleosol sequence in Zaprężyn (SW Poland). The pore-water chemical composition provides information about behaviour of the elements in the loess profile during the rock-water interactions. The applied method of ex situ water extraction allows only obtaining slightly bound water, which determines physicochemical parameters of the ground. The considerable variability of the values of pH, EC and concentrations of Al3+, Fe3+, Mn2+, Mg2+, Ca2+, Na+, K+, SO42-, Cl- ions and SiO2 was caused by stratification of sediments. The effect of reduced-permeability barrier on the increased concentrations of some ions was also found.