Widely used in chemical product manufacture, 1,4-dioxane is one of the emerging contaminants, and it poses great risk to human health and the ecosystem. The aim of this study was to degrade 1,4-dioxiane using a pulsed switching peroxi-coagulation (PSPC) process. The electrosynthesis of H₂O₂ on cathode and Fe²⁺ production on iron sacrifice anode were optimized to enhance the 1,4-dioxane degradation. Under current densities of 5 mA/cm² (H₂O₂) and 1 mA/cm² (Fe²⁺), 95.3 ± 2.2% of 200 mg/L 1,4-dioxane was removed at the end of 120 min operation with the optimal pulsed switching frequency of 1.43 Hz and pH of 5.0. The low residual H₂O₂ and Fe²⁺ concentrations were attributed to the high pulsed switching frequency in the PSPC process, resulting in effectively inhibiting the side reaction during the ·OH production and improving the 1,4-dioxane removal with low energy consumption. At 120 min, the minimum energy consumption in the PSPC process was less than 20% of that in the conventional electro-Fenton process (7.8 ± 0.1 vs. 47.0 ± 0.6 kWh/kg). The PSPC should be a promising alternative for enhancing 1,4-dioxane removal in the real wastewater treatment.

1,4-二恶烷广泛用于化工产品制造，是一种新兴的污染物，对人类健康和生态系统构成巨大威胁。本研究的目的是使用脉冲切换过氧化物凝固 (PSPC) 过程降解 1,4-二氧六环。优化阴极上H ₂ O ₂的电合成和铁牺牲阳极上Fe ^{2+ 的}产生以增强1,4-二氧六环的降解。在 5 mA/cm ² (H ₂ O ₂ ) 和 1 mA/cm ² (Fe ²⁺ ) 的电流密度下，在 120 分钟运行结束时去除了 95.3 ± 2.2% 的 200 mg/L 1,4-二恶烷最佳脉冲开关频率为 1.43 Hz，pH 值为 5.0。低残差 H₂ O ₂和Fe ²⁺浓度归因于PSPC过程中的高脉冲开关频率，从而有效抑制了·OH生成过程中的副反应，提高了1,4-二氧六环的去除率，且能耗低。在 120 分钟时，PSPC 工艺的最低能耗不到传统电芬顿工艺的 20%（7.8 ± 0.1 vs. 47.0 ± 0.6 kWh/kg）。PSPC 应该是在实际废水处理中提高 1,4-二恶烷去除率的有前途的替代方案。