“…The adsorption peaks around 3420, 891, and 1620 cm −1 can be assigned to the stretching vibration peaks of O–H, CC, and CO, respectively, indicating that the surface of the composite was rich in oxygen-containing functional groups, which was conducive to the adsorption of organic compounds. Specifically, Fe 3 O 4 /CBc showed an absorption peak at 607 cm −1 in the infrared image, which was the bending vibration peak of Fe–O–Fe, 18,19 suggesting that Fe 3 O 4 was successfully loaded on the surface of coconut-clothed biochar.…”