Trifluralin is one of the most widely used herbicides, being accounted as the cause of cancer in human. In the present research, the UV/S₂O₈²⁻ and ZnO/UV processes’ efficiency in the removal of trifluralin was investigated. A lab scale equipped with a UV lamp was applied. The parameters were studied, including initial trifluralin concentration (0.4–1.2 mg/L), contact time (20–60 min), S₂O₈²⁻ concentration (20–60 μM), and ZnO concentration (50–150 mg/L). The remained trifluralin concentration was measured by HPLC. This study proved the trifluralin removal of 92.90 ± 1.6% and 87.91 ± 19.22% for UV/S₂O₈²⁻ and UV/ZnO processes in the best operation conditions (contact time of 60 min, the persulfate concentration of 40 μM, and the ZnO concentration of 100 mg/L). The optimal trifluraline concentrations were 1.2 mg/L and 0.6 mg/L for UV/S₂O₈²⁻ and UV/ZnO processes, respectively. In both processes, the removal efficiency of trifluralin increased significantly with increasing contact time. The findings exhibited that both processes UV/S₂O₈²⁻ and UV/ZnO followed the zero-order kinetic. The electrical energy consumed of UV/S₂O₈² and UV/ZnO was about 43.95 and 20.41 Kwh/kg, respectively. The results show that UV/S₂O₈²⁻ and ZnO/UV processes were appropriate as the effective treatment method for trifluralin removal. Therefore, it is proposed to study the performance of these processes as an environmentally friendly practice in full scale with real wastewater.

中文翻译：

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UV / S2O82-和UV / ZnO工艺对水溶液中氟乐灵的光催化降解：去除效率和成本估算的比较

三氟拉林是最广泛使用的除草剂之一，被认为是导致人类癌症的原因。在本研究中，研究了UV / S ₂ O ₈ ^2-和ZnO / UV工艺去除^三氟拉林的效率。使用配备有紫外线灯的实验室规模。的参数进行了研究，包括初始浓度的氟乐灵（0.4-1.2毫克/升），接触时间（20-60分钟），S ₂ ö ₈ ^2-浓度（20-60  μ M），和ZnO的浓度（50-150毫克/ L）。残留的三氟拉林浓度通过HPLC测量。这项研究证明UV / S ₂ O ₈ ^2-的三氟拉林去除率分别为92.90±1.6％和87.91±19.22％和在最佳的操作条件UV /氧化锌的过程（60分钟，40过硫酸盐浓度的接触时间 μ M和100毫克/ L ZnO的浓度）。UV / S ₂ O ₈ ^2-和UV / ZnO工艺的最佳^三氟拉林最佳浓度分别为1.2 mg / L和0.6 mg / L。在这两个过程中，三氟拉林的去除效率均随着接触时间的增加而显着提高。研究结果表明，UV / S ₂ O ₈ ^2-和UV / ZnO的两个过程均遵循零级动力学。UV / S ₂ O ₈ ²和UV / ZnO消耗的电能分别约为43.95和20.41 Kwh / kg。结果表明，UV / S ₂O ₈ ^2-和ZnO / UV工艺是去除氟乐灵的有效方法。因此，建议对这些工艺的性能进行研究，以对真实废水进行全面的环境友好实践。