Impact of drying, freezing and re-wetting events soil leachate in acidic versus calcareous soils
This study investigates the impact of drying-rewetting and freezing-rewetting events on soil leachate ion composition across two contrasting geochemical settings through a series of controlled laboratory experiments. Dissolution of ions (Na?, K?, Ca??, Mg??, Al??, Fe??, Mn??, F?, Cl?, NO??, SO???, NO??, PO???) in soil leachate was analyzed following rewetting cycles after drying and freezing treatments. Results indicate that variations in leachate ion concentrations are primarily influenced by bedrock type, while drying-rewetting and freezing-rewetting treatments did not significantly impact overall variance. However, some inconsistent differences were observed: higher K? concentrations in calcareous soils and Al??, Fe?? and Mn?? in acidic soils after drying, higher anion concentrations in calcareous soils in both treatment leachates compared to controls. Findings highlight that the effects of drying, freezing, and rewetting are inherently linked to treatment type, ion characteristics, and geochemical conditions.