Investigation of Ultrasonic Recovery of Platinum Chloride Solution Using the Ion Exchange Method

In light of the challenge associated with recovering platinum from platinum-containing waste using ion exchange techniques, there is a need to enhance the process of platinum adsorption. To address this, the ultrasonic strengthening method has been employed to improve the adsorption efficiency. Through the application of ultrasound, various resins were utilized to extract platinum metal from platinum-containing chloride leaching solution, with the identification of the most effective resin. The resin underwent characterization using diverse methods, and the adsorption mechanism was scrutinized. Findings indicated that the optimal ultrasonic power level was 240 W. In comparison to the traditional 12-h adsorption saturation period, dynamic equilibrium could be achieved within 3 h under ultrasonic conditions, with a maximum static adsorption saturation of 30.62 mg/g. The most favorable pH value was determined to be 1. The adsorption process of platinum on the resin was accurately described by the pseudo-second-order kinetic model. The 717 resins exhibited notable selectivity and reusability, maintaining an adsorption rate above 91.24% even after 5 regeneration cycles. In conclusion, ultrasound as a reinforcement method offers a viable approach for the practical recovery of precious metals.