Treatment of azo dye-containing wastewater by a Fenton-like process in a continuous packed-bed reactor filled with activated carbon
Treatment of azo dye-containing wastewater by a Fenton-like process in a continuous packed-bed reactor filled with activated carbon
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DOI：
10.1016/j.jhazmat.2012.07.066
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发表时间：
2012-10-30
影响因子：
13.6
通讯作者：
Madeira, Luis M.
中科院分区：
文献类型：
--
作者：
Mesquita, Isabel;Matos, Luis C.;Madeira, Luis M.
在本工作中，在填充床反应器中进行了染料溶液的类Fenton过程的氧化。用硫酸亚铁浸渍Norit RX 3 Extra活性炭作催化剂(含铁量为7%)。分析了主要操作条件对芝加哥天蓝(CSB)降解的影响。结果表明，随着温度的升高，染料的脱色率提高，矿化程度增加。然而，它也增加了铁的浸出，但观察到的数值低于0.4ppm(因此，远远低于欧盟的限制)。在温度为50℃，pH为3，W-CAT/Q=4.1gmin mL(-1)(W-CAT为催化剂质量，Q为总进料流量)和H_2O_2进料浓度为2.25mM(CSB进料浓度为0.012 mM)的条件下，稳定状态下，染料转化率可达88%，总有机碳(TOC)去除约47%。在连续的三个周期中达到了相同的性能。(C)2012爱思唯尔B.V.保留所有权利。
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 degrees 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 H2O2 feed concentration of 2.25 mM (for a CSB feed concentration of 0.012 mM). The same performance was reached in three consecutive cycles. (c) 2012 Elsevier B.V. All rights reserved.