Alguacil Francisco J, Alcaraz Lorena, Largo Olga R, López Félix A
National Center for Metallurgical Research (CENIM), Spanish National Research Council (CSIC), Avenida Gregorio del Amo 8, 28040 Madrid, Spain.
Membranes (Basel). 2020 Dec 17;10(12):432. doi: 10.3390/membranes10120432.
By the use of the tertiary amine A327 and 1 M HCl solution as precursors, the ionic liquid A327HCl was generated and used to investigate its performance in the transport of Au(III) from hydrochloric acid medium. The influence of the stirring speed (600-1800 min), ionic liquid concentration (1.25-50% ) in the membrane phase, and gold concentration (0.01-0.15 g/L) in the feed phase on metal transport have been investigated. An equation which included both equilibrium and kinetics parameters was derived, and the membrane diffusional resistance (Δ) and feed phase diffusional resistance (Δ) was estimated as 9.5 × 10 s/cm and 307 s/cm, respectively. At carrier concentrations in the 5-50% range and gold concentrations in the 0.01-0.15 g/L range, metal transport is controlled by diffusion of metal species through the feed boundary layer, whereas at the lowest carrier concentrations, membrane diffusion is predominant. From the receiving solutions, gold can be recovered as gold nanoparticles.
以叔胺A327和1 M盐酸溶液作为前驱体，生成离子液体A327HCl，并用于研究其在盐酸介质中传输Au(III)的性能。研究了搅拌速度（600 - 1800分钟）、膜相中离子液体浓度（1.25 - 50%）以及进料相中金浓度（0.01 - 0.15 g/L）对金属传输的影响。推导了一个包含平衡和动力学参数的方程，膜扩散阻力（Δ）和进料相扩散阻力（Δ）分别估计为9.5×10 s/cm和307 s/cm。在载体浓度为5 - 50%范围内以及金浓度为0.01 - 0.15 g/L范围内，金属传输受金属物种通过进料边界层的扩散控制，而在最低载体浓度下，膜扩散占主导。从接收溶液中，可以将金回收为金纳米颗粒。
