Heterogeneous and homogeneous Fenton processes using activated carbon for the removal of the herbicide amitrole from water
Heterogeneous and homogeneous Fenton processes using activated carbon for the removal of the herbicide amitrole from water
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DOI：
10.1016/j.apcatb.2010.10.012
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发表时间：
2011-01-14
影响因子：
22.1
通讯作者：
Moreno-Castilla, C.
中科院分区：
文献类型：
--
作者：
Fontecha-Camara, M. A.;Alvarez-Merino, M. A.;Moreno-Castilla, C.
研究了均相和非均相芬顿反应中过氧化氢分解氧化去除杀草胺的效果。为此，活性炭布用于制备具有不同铁盐（硫酸盐、乙酸盐和硝酸盐）和铁金属负载的负载型铁催化剂。在不存在或存在活性炭布的情况下，通过使用硫酸铁或乙酸铁进行均相芬顿反应。在非均相芬顿反应中，TOC（总有机碳）和AMT的去除量取决于铁金属负载量和Fe/H2 O2摩尔比，铁的浸出率很低。最高的AMT降解（类似于90%），实现了与均相芬顿反应，使用FeSO 4在活性炭布的存在下，这可能是由于活性炭和铁盐之间的协同效应;与此程序，类似于60%的TOC被去除。当醋酸铁作为均相催化剂时，没有观察到协同效应。硫酸根离子的存在有利于AMT氧化为乌拉唑。观察到硝酸盐和铵离子，但浓度可忽略不计。(C)2010爱思唯尔有限公司版权所有。
The study objective was to investigate the removal of amitrole (AMT) by oxidation using the decomposition of hydrogen peroxide in heterogeneous and homogeneous Fenton reactions. For this purpose, an activated carbon cloth was used to prepare supported iron catalysts with different iron salts (sulfate, acetate and nitrate) and iron metal loadings. Homogeneous Fenton reactions were carried out by using iron sulfate or acetate in the absence or presence of the activated carbon cloth. In the heterogeneous Fenton reaction, the amounts of TOC (total organic carbon) and AMT removed depended on the iron metal loading and the Fe/H2O2 molar ratio; iron leaching was very low. The highest AMT degradation (similar to 90%) was achieved with the homogeneous Fenton reaction using FeSO4 in the presence of the activated carbon cloth, which may be due to a synergic effect between activated carbon and iron salt; with this procedure, similar to 60% of the TOC was removed. The synergic effect was not observed when iron acetate was used as homogeneous catalyst. The presence of sulfate ions favored the oxidation of AMT to urazole. Nitrate and ammonium ions were observed but at negligible concentrations. (C) 2010 Elsevier B.V. All rights reserved.