Sonochemical technology is a technology that involves ultrasonic waves in chemical reactions. In this study. humic acid isolated from peat soil has been successfully modified with magnetite (HA-Fe3O4) using sonochemical technology. Characterization of the physical and chemical properties of HA-Fe3O4 was carried out using FTIR. https://www.bekindtopets.com/great-pick-Lost-Oil-Painting-Von-Bredow-s-Death-Ride-August-16th-1870-by-Jules-Bastien-LePage-mega-offer/