Abstract In this work a two-compartment galvanic cell with two graphite rod electrodes and two types of cation exchange membranes: namely the Nafion membrane and synthetic fabric membrane is tested in treating sulfide containing wastes and recovery of elemental sulfur. The cell reactions are sulfide oxidation at the anode and chromium (VI) reduction at the cathode. The effect of different parameters such as external resistance, initial concentration of K2Cr2O7 solution, H2SO4 concentration, and initial concentration of Na2S, the pH of the solution, NaCl concentration, and temperature of the solution is investigated. The cell performance as a reactor and as an energy converter is expressed in terms of % sulfide removal and current-voltage plots, respectively. Depending on the effects of the aforementioned factors, the optimal conditions that give the highest performance were determined, and then the cell was tested on real wastes from refinery processing at those conditions. The cell showed high selectivity in sulfide removal and sulfur recovery with almost no interference with other contaminants.

中文翻译：

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硫离子的电化学脱除及含硫废物中硫的回收

摘要 在这项工作中，测试了具有两个石墨棒电极和两种阳离子交换膜（即 Nafion 膜和合成纤维膜）的两室原电池处理含硫化物废物和回收元素硫。电池反应是阳极处的硫化物氧化和阴极处的铬 (VI) 还原。研究了不同参数如外阻、K2Cr2O7 溶液初始浓度、H2SO4 浓度和 Na2S 初始浓度、溶液的 pH 值、NaCl 浓度和溶液温度的影响。电池作为反应器和能量转换器的性能分别用硫化物去除百分比和电流-电压图表示。根据上述因素的影响，确定了提供最高性能的最佳条件，然后在这些条件下对炼油厂加工产生的实际废物对电池进行了测试。该电池在硫化物去除和硫回收方面表现出高选择性，几乎不会干扰其他污染物。