Chemical Engineering Department, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
J Hazard Mater. 2012 Oct 30;237-238:30-7. doi: 10.1016/j.jhazmat.2012.07.066. Epub 2012 Aug 24.
In this work, oxidation with a Fenton-like process of a dye solution was carried out in a packed-bed reactor. Activated carbon Norit RX 3 Extra was impregnated with ferrous sulfate and used as catalyst (7 wt.% of iron). The effect of the main operating conditions in the Chicago Sky Blue (CSB) degradation was analyzed. It was found that the increase in temperature leads to a higher removal of the dye and an increased mineralization. However, it also increases the iron leaching, but the values observed were below 0.4 ppm (thus, far below European Union limits). It was possible to reach, at steady-state, a dye conversion of 88%, with a total organic carbon (TOC) removal of ca. 47%, being the reactor operated at 50°C, pH 3, W(cat)/Q=4.1 g min mL(-1) (W(cat) is the mass of catalyst and Q the total feed flow rate) and a H(2)O(2) feed concentration of 2.25 mM (for a CSB feed concentration of 0.012 mM). The same performance was reached in three consecutive cycles.
在这项工作中，采用芬顿类似工艺在填充床反应器中对染料溶液进行氧化。用硫酸亚铁浸渍活性碳 Norit RX 3 Extra 并将其用作催化剂（铁含量为 7wt.%）。分析了主要操作条件对芝加哥天蓝色（CSB）降解的影响。结果表明，温度升高会导致染料去除率提高和矿化程度增加。然而，这也会增加铁浸出，但观察到的浓度低于 0.4ppm（远低于欧盟限值）。在 50°C、pH3、W(cat)/Q=4.1g min mL(-1)（W(cat)为催化剂的质量，Q 为总进料流速）和 H(2)O(2)进料浓度为 2.25mM（CSB 进料浓度为 0.012mM）的条件下，达到了稳态时染料转化率为 88%、TOC 去除率约为 47%的效果。在三个连续循环中达到了相同的性能。
