POJEMNOŚĆ WYMIANY KATIONÓW OSADÓW PLEJSTOCENU I WPŁYW WYMIANY JONOWEJ NA SKŁAD CHEMICZNY WÓD PODZIEMNYCH W DOLINIE KOPALNEJ W REJONIE RACIBORZA

Abstract

CATION EXCHANGE CAPACITY AND THE INFLUENCE OF ION EXCHANGE ON CHEMICAL COMPOSITION OF GROUNDWATER IN THE BURIED VALLEY IN THE RACIBÓRZ AREAAbstract. Ion exchange is one of the major geochemical processes affecting chemical composition of potable groundwater. Cation exchange capacity (CEC) is a major parameter required by reactive transport models. Nevertheless, the said parameter is rarely quantitatively evaluated in hydrogeochemical studies. Since the role of reactive transport models increases, the choice of the most accurate method of CEC evaluation is of major significance in groundwater studies. The paper presents the values of CEC of sediments sampled in the buried valley aquifer in the Racibórz area. In that aquifer, the distribution of many cations is controlled by ion exchange process. The measurements of CEC were performed with the use of three conventional methods (empirical formula, batch test and column experiment). Subsequently, the differences among the results are discussed.