Gold Recovery from Au-Containing Wastewater by VACF in a Fluidized Bed

摘要

The experiments for recovery of Au by activated carbon fibers (ACFs) were carried out in a fluidized bed with 1200mm height and 40mm diameter.The rates of reaction of the functional fibers with Gold in the pure aurum solution and in the aurum-containing wastewater were respectively measured at the different solution flow rates and compared with the results at the static solution conditions.The experiments indicated that the reaction raets at the fluidization are obvious higher than thsoe at the static state and the reaction rates increase with an increase of solution flow rate.It demonstrates that the thickness of concentration boundary layer is decreased and a uniform temperature field is established in the bed due to the increase of turublent extent with increasing the relative fiber/solution velocity.