One of the consequences of phytosanitary treatments applied to crops is the generation of a great volume of agro-wastewater having pesticide residues. These pollutants can be considered a serious threat to the environment and human health due to their capacity to affect distant areas remaining for a long time after their application. We have assessed the degradation of five pesticides in agro-waste water produced in two farms by the cleaning pesticide containers and phytosanitary treatment equipment used in the farms. For this purpose, a pilot facility was installed in both farms and advanced oxidation treatments were conducted using natural sunlight by means of Na2S2O8 and heterogeneous photocatalysis (TiO2/Na2S2O8). The remaining percentages obtained at the end of the experiments ranged from 5 to 90.1% for chlorantraniliprole, 5 to 82.3% for difenoconazole, 0.02 to 19.1% for metalaxyl, 1.4 to 74.4% for myclobutanil, and 0.3 to 61% for triadimenol. We observed a correlation between the higher remaining percentages and the total initial concentration of pollutant because of other commercial formulations applied in the farms. The results showed that this equipment could be used to eliminate or reduce the presence of pesticide residues in agro-waste water using an innovative facility installed in the farms and a renewable and economical source of energy (sunlight).

中文翻译：

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太阳能光催化作为使用模块化设施现场回收农场中农药残留污染的农业废水的策略。

对作物进行植物检疫处理的后果之一是大量农药残留产生的农业废水的产生。由于这些污染物在使用后很长一段时间内会影响到仍在遥远地区的污染物，因此可以视为对环境和人类健康的严重威胁。我们通过清洁农场中使用的农药容器和植物检疫处理设备，评估了两个农场产生的农业废水中五种农药的降解情况。为此，在两个农场都安装了一个试验设施，并利用自然光通过Na2S2O8和多相光催化（TiO2 / Na2S2O8）进行了先进的氧化处理。在实验结束时获得的剩余百分数为：氯虫腈为5至90.1％，为5至82。苯乙康唑为3％，甲霜灵为0.02％至19.1％，丁菌腈为1.4％至74.4％，三adi烯醇为0.3％至61％。由于农场中采用了其他商业配方，我们观察到较高的剩余百分比与污染物的总初始浓度之间存在相关性。结果表明，该设备可通过农场中安装的创新设施和可再生且经济的能源（阳光）用于消除或减少农业废水中农药残留的存在。