Metribuzin is an herbicide that easily contaminates ground and surface water. Herein, La-doped ZnFe layered double hydroxide (LDH) was synthesized for the first time and used for the degradation of metribuzin via ultrasonic (US) assisted peroxydisulfate (PDS) activation. The synthesized LDH had a lamellar structure, an average thickness of 26 nm, and showed mesoporous characteristics, including specific surface area 110.93 m² g⁻¹, pore volume 0.27 cm³ g⁻¹, and pore diameter 9.67 nm. The degradation efficiency of the US/La-doped ZnFe LDH/PDS process (79.1 %) was much greater than those of the sole processes, and the synergy factor was calculated as 3.73. The impact of the reactive species on the sonocatalytic process was evaluated using different scavengers. After four consecutive cycles, 10.8 % loss occurred in the sonocatalytic activity of the La-doped LDH. Moreover, the efficiency of the US/La-doped LDH/PDS process was studied with respect to the degradation of metribuzin in a wastewater matrix. According to GC–MS analysis, six by-products were detected during the degradation of metribuzin. Our results indicate that the US/La-doped ZnFe LDH/PDS process has great potential for efficient degradation of metribuzin-contaminated water and wastewater.

赛克津是一种除草剂，很容易污染地下水和地表水。在此，首次合成了La掺杂ZnFe层状双氢氧化物（LDH），并通过超声波（US）辅助过二硫酸盐（PDS）活化用于降解赛克津。合成的LDH具有层状结构，平均厚度为26 nm，表现出介孔特性，比表面积为110.93 m ² g ^-1 ，孔体积为0.27 cm ³ g ^-1 ，孔径为9.67 nm。 US/La掺杂ZnFe LDH/PDS工艺的降解效率（79.1%）远高于单独工艺，计算出协同因子为3.73。使用不同的清除剂评估活性物质对声催化过程的影响。连续四个循环后，La 掺杂 LDH 的声催化活性损失了 10.8%。此外，还研究了 US/La 掺杂 LDH/PDS 工艺在废水基质中赛克嗪降解方面的效率。根据GC-MS分析，赛克津降解过程中检测到六种副产物。我们的结果表明，US/La 掺杂 ZnFe LDH/PDS 工艺在有效降解赛克津污染的水和废水方面具有巨大潜力。