In this work, the experimental characterization of a rotating cylinder electrode (RCE) reactor employed for the complete degradation of the antibiotic ampicillin (AMP) by photoelectro-Fenton (PEF) process has been addressed for the first time. Once produced from water oxidation at six Ti|IrO2 anodic plates, O2 was quickly transported by forced convection toward the central RCE, which consisted of a 316 stainless-steel cylinder covered with a (C-PTFE)-coated carbon cloth, thus ensuring the continuous production of H2O2 from the two-electron O2 reduction reaction (ORR). The accumulated H2O2 reached a concentration of 83.3 mg L−1 H2O2 after 60 min in a 50 mM Na2SO4 solution at pH 3, operating at an RCE peripheral velocity U = 79.6 cm s−1 and fixed cathodic potential of Ecath = −0.45 V vs. SHE. Furthermore, the optimum PEF conditions led to the complete destruction of 10 mg L−1 AMP in only 10 min upon addition of 0.4 mM Fe2+ as catalyst under UVA light irradiation, with a low electrolytic energy consumption of 0.211 kWh (g TOC)−1. In addition, the evolution of final carboxylic acids and inorganic ions over the electrolysis time was monitored by chromatographic and spectrophotometric techniques. PEF treatment clearly outperformed the anodic oxidation with (AO-H2O2) and the electro-Fenton (EF) processes, which opens the door to a sustainable and powerful electrochemical technology with no need for an air compressor for H2O2 production and viable under limitless sunlight irradiation.

中文翻译：

---

在旋转圆筒电极反应器中通过光电芬顿过程通过阳极 O2 持续产生 H2O2 以破坏抗生素氨苄西林


在这项工作中，首次对用于通过光电芬顿（PEF）过程完全降解抗生素氨苄青霉素（AMP）的旋转圆柱电极（RCE）反应器进行了实验表征。一旦水在六块 Ti|IrO2 阳极板上氧化产生，O2 就会通过强制对流快速输送到中央 RCE，该中央 RCE 由覆盖着 (C-PTFE) 涂层碳布的 316 不锈钢圆筒组成，从而确保了通过双电子 O2 还原反应 (ORR) 连续生产 H2O2。在 pH 3 的 50 mM Na2SO4 溶液中 60 分钟后，累积的 H2O2 浓度达到 83.3 mg L−1 H2O2，在 RCE 外围速度 U = 79.6 cm s−1 和固定阴极电位 Ecath = -0.45 V vs 下运行。 她。此外，在最佳PEF条件下，在UVA光照射下添加0.4 mM Fe2+作为催化剂，仅10分钟即可完全破坏10 mg L−1 AMP，电解能耗低至0.211 kWh (g TOC)−1 。此外，通过色谱和分光光度技术监测电解时间内最终羧酸和无机离子的演变。 PEF 处理明显优于 (AO-H2O2) 阳极氧化和电芬顿 (EF) 工艺，这为可持续且强大的电化学技术打开了大门，无需空气压缩机即可生产 H2O2，并且在无限阳光照射下可行。