Dept. Chemical Engineering and Physical Chemistry, University of Extremadura, Avda. Elvas, 06006, Badajoz, Spain.
Dept. Chemical Engineering and Physical Chemistry, University of Extremadura, Avda. Elvas, 06006, Badajoz, Spain.
J Environ Manage. 2020 Feb 15;256:109972. doi: 10.1016/j.jenvman.2019.109972. Epub 2019 Dec 13.
The degradation of a model pollutant, tartrazine, very used in food industry and usually present in WWTPs effluents and surface waters, was investigated by nine activated homogeneous catalytic processes, namely, Fe/HO, Fe/HO, UV/HO, UV/SO, UV/Fe/HO, UV/Fe/HO, UV, VIS/Fe/HO, and VIS/Fe/HO/CO. In order to compare the mineralization and oxidation ability of each process, the removal of dye, chemical oxygen demand (COD) and total organic carbon (TOC) were analyzed, as well as the overall kinetic rate constant. Also, the different oxidation path-ways (direct photolysis and/or oxidation by free radicals) were estimated for each system. After the comparison, the Fenton process, which had the highest mineralization values, was tested in luminous and dark phases using designed experiments, and the influences of all operating variables were studied by RSM.
研究了 9 种均相活化催化过程（Fe/HO、Fe/HO、UV/HO、UV/SO、UV/Fe/HO、UV/Fe/HO、UV、VIS/Fe/HO 和 VIS/Fe/HO/CO）对模型污染物（食品工业中常用的食用色素柠檬黄）的降解。为了比较各过程的矿化和氧化能力，分析了染料、化学需氧量（COD）和总有机碳（TOC）的去除情况，以及整体动力学速率常数。此外，还估计了每个体系的不同氧化途径（直接光解和/或自由基氧化）。比较后，使用设计实验对具有最高矿化值的 Fenton 工艺进行了在有光和无光阶段的测试，并通过响应面法（RSM）研究了所有操作变量的影响。
