| 摘要 |
Disclosed herein is a method of effectively extracting metal ions by sonication from red med that is waste remaining after extracting aluminum from bauxite. The method comprises the steps of: (a) introducing, into a reactor placed in a constant-temperature tank, (1) a neutralized red mud slurry and an acidic solution or (2) red mud slurry, distilled water and an acidic solution, to form a red mud slurry, and heating the constant-temperature tank to allow the red mud slurry to react while sonicating the red mud slurry, thereby extracting metal ions from the red mud; and (b) filtering a product resulting from step (a) to provide a filtrate and a red mud residue, and separating and recovering the filtrate and the red mud residue, wherein the sonication in step (a) is performed using an ultrasonic generator by applying ultrasonic waves to an ultrasonic tip placed in the constant-temperature tank. |
