In this research work, we investigated the ability of the oxidative degradation of 2, 4-Dichlorophenoxy acetic acid herbicide via ultrasonic-assisted in electro-activation of the persulfate system in the presence of nano-zero valent iron. The effect of experimental parameters such as pH value [4–8], electrical current (0.5–1 A), persulfate concentration (0.25–0.5 mg.l⁻¹), nano zero-valent iron dose (0.05–0.1 mg.l⁻¹), and initial organic pollutant concentration (50–100 mg.l⁻¹) on the ultrasonic-electropersulfate process performance was assessed via central composite design. The combination of ultrasonic waves with the electrochemical process to activation of persulfate showed better efficiency into 2, 4-Dichlorophenoxy acetic acid herbicide degradation compared to their implementation in individual and binary systems. Following optimal conditions (pH = 5.62, 0.80 A applied electrical current, 0.39 mg/L persulfate concentration, 0.07 mg/L nano-zero valent iron, and 50 mg/L 2,4-Dichlorophenoxy acetic acid concentration in 40 min reaction), nearly 91% removal was done. Moreover, the complete removal of 2, 4-Dichlorophenoxy acetic acid, 92% COD, and 88% TOC removal was achieved by this process near 140 min reaction. The scavenging experiment confirmed the role of free oxidizing species in the degradation of 2, 4-Dichlorophenoxy acetic acid during the process. Approximately 50% improved 2, 4-Dichlorophenoxy acetic acid removal in the process against the inclusive efficiency of single mechanisms. The obtained results were fitted to the pseudo-first-order kinetic model with a high correlation coefficient (R² = 0.96). Five important intermediate products of 2, 4-D oxidation were 2, 4-dichlorophenol (2, 4-DCP), 2, 6-dichlorophenol (2, 6-DCP), 4, 6 dichlororesorcinol (4, 6-DCR), 2-chlorohydroquinone (2-CHQ), and 2-chloro-1, 4-benzoquinone (2-CBQ). In the end, can be employed as a satisfactory advanced oxidation process in high mineralization of 2, 4-D and refractory organic pollutants.

在这项研究工作中，我们研究了在纳米零价铁存在下，通过超声波辅助电活化过硫酸盐体系对 2, 4-二氯苯氧基乙酸除草剂的氧化降解能力。pH值[4-8]、电流(0.5-1 A)、过硫酸盐浓度(0.25-0.5 mg.l ^-1 )、纳米零价铁剂量(0.05-0.1 mg.l)等实验参数的影响^-1 ) 和初始有机污染物浓度 (50–100 mg.l ^-1) 通过中心复合设计评估了超声波-电过硫酸盐工艺性能。与在单独和二元系统中实施相比，超声波与电化学过程相结合以活化过硫酸盐显示出更好的 2, 4-二氯苯氧基乙酸除草剂降解效率。遵循最佳条件（pH = 5.62、0.80 A 施加电流、0.39 mg/L 过硫酸盐浓度、0.07 mg/L 纳米零价铁和 50 mg/L 2,4-二氯苯氧基乙酸浓度，反应 40 分钟），已完成近 91% 的去除。此外，该过程在接近 140 分钟的反应时间内实现了 2, 4-二氯苯氧基乙酸的完全去除，92% 的 COD 和 88% 的 TOC 去除。清除实验证实了游离氧化物在降解 2 中的作用，过程中产生4-二氯苯氧基乙酸。与单一机制的包容性效率相比，该过程中 2, 4-二氯苯氧基乙酸的去除率提高了大约 50%。将所得结果拟合到具有高相关系数（R²  = 0.96)。2, 4-D氧化的五个重要中间产物分别是2, 4-二氯苯酚（2, 4-DCP）、2, 6-二氯苯酚（2, 6-DCP）、4, 6二氯间苯二酚（4, 6-DCR）、 2-氯氢醌 (2-CHQ) 和 2-氯-1, 4-苯醌 (2-CBQ)。最后，可作为一种令人满意的高级氧化工艺用于高矿化2、4-D和难降解有机污染物。