Zinkowska Karolina, Hubicki Zbigniew, Wójcik Grzegorz
Department of Inorganic Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, Maria Curie-Skłodowska Sq. 2, 20-031 Lublin, Poland.
Molecules. 2025 Jan 2;30(1):151. doi: 10.3390/molecules30010151.
Owing to the intensive development of electrical and electronic equipment, there is an increasing demand for precious metals, which are often used for its production. Due to their scarce supply, it is important to recover them from secondary sources. A promising way to recover precious metals are impregnated resins. In this research, Amberlite XAD-16 was impregnated with TBP at the weight ratios of 1:2 and 1:3 using the 'warm impregnation' method. Studies were carried out on the sorption of Au(III), Pd(II), Pt(IV), and Rh(III) ions from the model chloride solutions as well as the real solution formed after leaching the smart card chips. Only Au(III) ions were efficiently sorbed on the prepared impregnated sorbents. The best results were obtained at 6 M HCl and the sorbent mass: 0.1 g/25 mL. The maximum sorption capacity for the impregnated sorbents was: 147.91 mg/g (ratio 1:2) and 149.66 mg/g (ratio 1:3). Recovery of Au(III) ions from the real leaching solution was: 97.36% and 97.77%, respectively. The Langmuir isotherm was the best-fit model for the experimental results. Thermodynamic studies proved that the investigated sorption process is spontaneous and exothermic. The desorption process can be easily carried out with 1 M HCl/1 M TU.
由于电气和电子设备的迅猛发展，对常用于其生产的贵金属的需求日益增加。由于其供应稀缺，从二次资源中回收它们很重要。回收贵金属的一种有前景的方法是浸渍树脂。在本研究中，采用“温热浸渍”法，以1:2和1:3的重量比用磷酸三丁酯（TBP）浸渍Amberlite XAD - 16。对从模拟氯化物溶液以及智能卡芯片浸出后形成的实际溶液中吸附金（III）、钯（II）、铂（IV）和铑（III）离子进行了研究。只有金（III）离子能有效地吸附在所制备的浸渍吸附剂上。在6 M盐酸以及吸附剂质量为0.1 g/25 mL时获得了最佳结果。浸渍吸附剂的最大吸附容量为：147.91 mg/g（比例1:2）和149.66 mg/g（比例1:3）。从实际浸出溶液中回收金（III）离子的回收率分别为97.36%和97.77%。朗缪尔等温线是最符合实验结果的模型。热力学研究证明所研究的吸附过程是自发的且放热的。解吸过程可用1 M盐酸/1 M硫脲轻松进行。
