A cross-linked polymer inclusion membrane (CL-PIM) incorporating the extractant trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl) phosphinate (Cyphos® IL 104) was developed for the first time for the enhanced Au(III) recovery from aqua regia digests of electronic waste (discarded mobile phones). Cellulose triacetate (CTA), poly(vinyl chloride) (PVC) and poly(vinylidene fluoride-co-hexafluropropylene) (PVDF-HFP) were examined as base polymers. The suitability of poly(ethylene glycol) dimethylacrylate (PEGDMA), poly(ethylene glycol) divinyl ether (PEGDVE) and N-ethylmaleimide (NEM) as cross-linking agents, and the possibility of using triarylsulfonium hexafluorophosphate (TASHFP) and 2,2-dimethoxy-2-phenylacetophenone (DMPA) as initiators were investigated. It was demonstrated that the CL-PIMs composed of Cyphos® IL 104 (30 wt%), PVDF-HFP, PEGDMA (base polymer to cross-linking agent ratio 6:4) and DMPA (1 wt%) or TASHFP (2 wt%) transported Au(III) from 2.5 mol L⁻¹ hydrochloric acid solutions twice as fast as their non-CL-PIM counterpart, showing excellent stability over five successive transport experiments. However, in aqua regia feed solutions (6 mol L⁻¹ acidity) only the CL-PIM containing TASHFP was able to achieve complete Au(III) recovery. AFM studies revealed that the PVDF-HFP-based CL-PIMs had a much higher surface contact area when compared to their non-CL counterpart, and this is proposed to be the reason for their superior transport performance. The CL-PIM that showed good transport efficiency in aqua regia was also applied to aqua regia digests of electronic waste from two mobile phones, and Au(III) was selectively recovered in less than 24 h, while other metals present in significantly higher concentrations were not transported.

首次开发了一种结合了萃取剂三己基十四烷基，双（2,4,4-三甲基戊基）次膦酸酯（Cyphos®IL 104）的交联聚合物包合物膜（CL-PIM），用于从王水中提高Au（III）的回收率电子废物摘要（废弃的手机）。检查了三乙酸纤维素（CTA），聚氯乙烯（PVC）和聚偏氟乙烯-六氟丙烯共聚物（PVDF-HFP）作为基础聚合物。聚乙二醇二甲基丙烯酸甲酯（PEGDMA），聚乙二醇二乙烯基醚（PEGDVE）和N-乙基马来酰亚胺（NEM）作为交联剂的适用性，以及使用六氟磷酸三芳基s（TASHFP）和2,2的可能性研究了以-二甲氧基-2-苯基苯乙酮（DMPA）为引发剂。已证明CL-PIM由IL 104（30 wt％），PVDF-HFP，^-1盐酸溶液的速度是非CL-PIM溶液的两倍，在五个连续的运输实验中显示出出色的稳定性。但是，在王水进料溶液（酸度为6 mol L ^-1）中，只有含CL-PIM的TASHFP才能完全回收Au（III）。AFM研究表明，与非CL对应物相比，基于PVDF-HFP的CL-PIM具有更高的表面接触面积，这被认为是其卓越运输性能的原因。在王水中显示出良好运输效率的CL-PIM也用于从两部移动电话中获得的电子废物的王水中消解物，并且在不到24小时的时间内选择性地回收了Au（III），而其他金属的浓度明显更高不运输。