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.roneverhart.com/Bearbrick-WALL-E-400/