Grupo de Procesos de Oxidación Avanzada, Departamento de Ingeniería Textil y Papelera, Universidad Politécnica de Valencia, Campus de Alcoy, 03801 Alcoy, Spain.
J Hazard Mater. 2011 Apr 15;188(1-3):181-7. doi: 10.1016/j.jhazmat.2011.01.089. Epub 2011 Jan 28.
The effect of organic species on a solar-driven photo-Fenton treatment of a mixture of pesticides (methyl-oxydemethon, methidathion, carbaryl and dimethoate) has been studied in this paper. Triethoxyisododecyl alcohol, acetophenone and ethylenediaminetetraacetic acid (EDTA) have been used as examples of surfactants, solvents and complexing agents, respectively. An inhibitory effect on mineralization as well as on the elimination of the pesticides was observed in the case of the aliphatic surfactants, most probably due to the competition between the pesticides and the added organic matter for reaction with the relatively unselective hydroxyl radical. A methodology combining chemical analyses and bioassays was tested in order to explore the applicability of coupling a photo-Fenton process with a biological treatment in the presence of the surfactant. Despite the complexity of the mixture under study, a reliable monitoring of the process was accomplished; the biocompatibility of the mixture was enhanced and the optimal irradiation intensity was achieved just after complete removal of the pesticides.
本文研究了有机物种对太阳能驱动的光芬顿处理混合农药（甲基氧化乐果、甲硫磷、西维因和乐果）的影响。三乙氧基异辛基醇、苯乙酮和乙二胺四乙酸（EDTA）分别用作表面活性剂、溶剂和络合剂的实例。在脂肪族表面活性剂的情况下，观察到对矿化以及对农药消除的抑制作用，这很可能是由于农药和添加的有机物与相对非选择性的羟基自由基之间的竞争。为了探索在表面活性剂存在下将光芬顿工艺与生物处理相结合的适用性，测试了一种结合化学分析和生物测定的方法。尽管研究中的混合物很复杂，但仍能可靠地监测该过程；混合物的生物相容性得到提高，并且在完全去除农药后达到了最佳辐照强度。
