Abstract In this study, gold was recovered by using an electrogenerative process employing a batch cell. This system is based on Galvanic cell which it does not require any external power supply but it produces an electrical energy by a spontaneous chemical reaction in which gold is reduced at cathode and zinc is oxidized at anode. The performances of three-dimensional electrodes, reticulated vitreous carbon (RVC) and porous graphite sheet (PG) were used as cathodes and investigated based on the time and percentage of gold recovery. In batch cell system, RVC served as the best cathode material, having the highest recovery rate with >99% of gold being recovered in 1 h operation for gold concentration of 100 mg L −1 . Cyclic voltammetry and mass transfer studies were conducted to study the characteristics of these cathodes for gold deposition. Based on the cyclic voltammograms, RVC and PG undergoes redox reaction within range 1200 mV to −600 mV. Finally, based on the cyclic voltammograms, it was found that gold reduction was observed at 0.2–0.1 V of potential range while oxidation peak was occurred at a potential range between 0.8 and 1.0 V.

中文翻译：

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不同 3-D 电极对使用电生工艺回收金性能的影响

摘要 在本研究中，采用间歇式电解槽的电解法回收金。该系统基于原电池，它不需要任何外部电源，但它通过自发化学反应产生电能，其中金在阴极还原，锌在阳极氧化。使用三维电极、网状玻璃碳（RVC）和多孔石墨片（PG）作为阴极，并根据金回收时间和百分比研究了其性能。在间歇式电池系统中，RVC 作为最好的正极材料，具有最高的回收率，当金浓度为 100 mg L -1 时，在 1 小时的操作中回收了 >99% 的金。进行循环伏安法和传质研究以研究这些用于金沉积的阴极的特性。根据循环伏安图，RVC 和 PG 在 1200 mV 至 -600 mV 范围内发生氧化还原反应。最后，基于循环伏安图，发现在 0.2-0.1 V 的电位范围内观察到金还原，而在 0.8 和 1.0 V 之间的电位范围内出现氧化峰。