Mineral commodities in Earth's crust, such as platinum, palladium, and gold have to be sustained especially since their ore deposits have been dramatically declining, due to intensive mining, motivated by high demand. The mining of these commodities results in large amounts of wastewater containing traces of precious elements. The current study presents on the recovery of Pt(IV) from aqueous solutions using spent brewer's yeast‐functionalized zeolite (SBYFZ). Batch and column experiments were conducted at different conditions. Two‐ and three‐parameter isotherm and kinetic models were fitted using adsorption data. Pt(IV) was significantly (p < .05) recovered from aqueous solutions within 300 min of contact time, using 10 g/L adsorbent dosage and 2 mg/L at pH 2. The platinum uptake was reduced by 5% when incorporated with adsorption competing ions. Other platinum group elements were successfully removed from aqueous solutions along with Pt(IV). Column studies indicated that breakthrough times were proportional to increasing bed height, highly acidic pH, and low influent concentration. The recovery of Pt(IV) was through mass transfer as concluded from column adsorption models. These results indicated that SBYFZ was excellent for the significant recovery of Pt(IV) from aqueous solutions. Thus, SBYFZ can be used in wastewaters with optimum conditions.

中文翻译：

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啤酒废酵母功能化沸石（SBYFZ）从水溶液中回收Pt（IV）：批次和色谱柱研究

地壳中的矿物商品，例如铂，钯和金，必须得到维持，特别是由于由于需求旺盛而进行的密集开采，其矿藏急剧减少。这些商品的开采导致大量废水中含有微量的珍贵元素。本研究提出了使用废啤酒酵母功能化沸石（SBYFZ）从水溶液中回收Pt（IV）的方法。分批和柱实验在不同条件下进行。使用吸附数据拟合了两参数和三参数等温线和动力学模型。Pt（IV）显着（p ≤0.05）在接触时间内300分钟内从水溶液中回收，使用10 g / L的吸附剂剂量和2 mg / L的pH2。当与吸附竞争离子结合时，铂的吸收量降低了5％。其他铂族元素已与Pt（IV）一起成功地从水溶液中去除。色谱柱研究表明，突破时间与床高，高酸性pH和低进水浓度成正比。Pt（IV）的回收是通过色谱柱吸附模型得出的质量转移进行的。这些结果表明，SBYFZ对于从水溶液中大量回收Pt（IV）而言是极好的。因此，SBYFZ可以在最佳条件下用于废水中。