Department of Chemical Engineering, ETSII, INEI, IMAES Group, University of Castilla-La Mancha, Avda. Camilo José Cela 3, 13071 Ciudad Real, Spain.
Department of Chemical Engineering, ETSII, INEI, IMAES Group, University of Castilla-La Mancha, Avda. Camilo José Cela 3, 13071 Ciudad Real, Spain.
J Hazard Mater. 2018 Jan 15;342:597-605. doi: 10.1016/j.jhazmat.2017.08.069. Epub 2017 Aug 30.
The intensification of the solar photo-Fenton system with ferrioxalate photoactive complexes and ultrasound applied to the mineralization of 15mg/L carbamazepine aqueous solution (CBZ) was evaluated. The experiments were carried out in a solar compound parabolic collector (CPC) pilot plant reactor coupled to an ultrasonic processor. The dynamic behavior of hydroxyl radicals generated under the different studied reaction systems was discussed. The initial concentrations of hydrogen peroxide and ferrous/oxalic acid and pH were found to be the most significant variables (32.79%, 25.98% and 26.04%, respectively). Under the selected optimal conditions ([HO]=150mg/L; [Fe]=2.5mg/L/[(COOH)]=12.1mg/L; pH=5) CBZ was fully degraded after 5min and 80% of TOC was removed using a solar photo-Fenton system intensified with ferrioxalate (SPFF). However, no improvement in the mineralization using SPFF process combined with ultrasound was observed. More mild pH conditions could be used in the SPFF system if compared to the traditional photo-Fenton (pH 3) acidic systems. Finally, a possible reaction pathway for the mineralization of CBZ by the SPFF system was proposed and therein discussed.
研究了铁草酸光活性配合物强化的太阳光芬顿系统与超声波在 15mg/L 卡马西平水溶液（CBZ）矿化中的应用。实验在太阳能复合抛物面集热器（CPC）中进行，该集热器与超声波处理器耦合。讨论了在不同研究反应体系下生成的羟基自由基的动态行为。发现过氧化氢和亚铁/草酸的初始浓度以及 pH 是最重要的变量（分别为 32.79%、25.98%和 26.04%）。在选定的最佳条件下（[HO]=150mg/L；[Fe]=2.5mg/L/[(COOH)]=12.1mg/L；pH=5），在 5min 内，使用铁草酸强化的太阳光芬顿系统（SPFF）完全降解了 CBZ，并且使用 SPFF 系统去除了 80%的 TOC。然而，使用 SPFF 工艺结合超声波对矿化没有改善。与传统的光芬顿（pH 3）酸性体系相比，在 SPFF 系统中可以使用更温和的 pH 条件。最后，提出并讨论了 SPFF 系统矿化 CBZ 的可能反应途径。
