PREPARATION AND APPLICATION OF FUNCTIONAL MAGNETIC NANOCOMPOSITE

Functional magnetic nanocomposite ( Fe3O4-HA) was successfully prepared by hydrothermal method，and then coated by humic acid ( HA) ． Adsorption behavior of the Fe3O4-HA to wastewater containing organic dye methylene blue ( MB) was studied by ultraviolet and visible spectrophotometer． The structure and property of the Fe3O4-HA were characterized by transmission electron microscopy，optical contact angle，fourier transform infrared spectroscopy，X ray diffractometer，vibrating sample magnetometer． The results demonstrate that Fe3O4-HA has a homogeneous structure，and its average particles size is about 300 nm and the saturation magnetization is 75. 3 emu /g． This synthetic Fe3O4-HA nanocomposite has good superparamagnetism，high adsorption efficiency and reusability．