Abstract This study presents the surface morphology of Ti/RuO2 anodes prepared by coating solutions of RuCl3xH2O with three different concentrations i.e. low (0.4 M), medium (0.8 M) and high (1.2 M). Efficiencies of these anodes were determined in terms of COD removal at 3.33, 6.66 and 10 mA/cm2 current densities. The most effective anode was further employed for degradation of 16 priority polycyclic aromatic hydrocarbons (PAHs) in aqueous solution. The surface morphology and characteristics of electrodes were determined by FESEM and XRDxr0= XRD and quantification of PAHs by GC–MS. Anode coated with medium concentration (0.8 M) of Ru offered good results for COD removal and PAHs degradation. About 61% of COD removal was found by anode coated with medium concentration of Ru without using electrolyte at 10 mA/cm2. Similarly, 74.82, 68.94 and 75.68% of total ΣPAHs removal were obtained without using electrolyte at pH 3, 6 and 9. The NaCl as an electrolyte promoted the electro-generated oxidants, like chlorine and hypochlorite, which consequently increased the efficiency of electrolytic treatment. The current results will be supportive in applicability of this method as a treatment process for the petrochemical industry and wastewater containing PAHs.

中文翻译：

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使用 ti/RuO2 阳极的电化学氧化从水溶液中去除 COD 和 PAHs

摘要 本研究介绍了由三种不同浓度即低 (0.4 M)、中 (0.8 M) 和高 (1.2 M) 的 RuCl3xH2O 涂层溶液制备的 Ti/RuO2 阳极的表面形貌。这些阳极的效率是根据在 3.33、6.66 和 10 mA/cm2 电流密度下的 COD 去除来确定的。最有效的阳极进一步用于降解水溶液中的 16 种优先多环芳烃 (PAH)。通过 FESEM 和 XRDxr0= XRD 确定电极的表面形貌和特征，并通过 GC-MS 对多环芳烃进行定量。涂有中等浓度 (0.8 M) Ru 的阳极为 COD 去除和 PAHs 降解提供了良好的结果。通过涂有中等浓度 Ru 且不使用 10 mA/cm2 电解液的阳极，发现约 61% 的 COD 去除率。同样，74.82、68.94 和 75。在 pH 值为 3、6 和 9 的情况下，不使用电解液即可去除 ΣPAHs 总量的 68%。作为电解液的 NaCl 促进了电解产生的氧化剂，如氯和次氯酸盐，从而提高了电解处理的效率。目前的结果将支持该方法作为石化工业和含 PAH 废水的处理工艺的适用性。