Solar degradation of 5-amino-6-methyl-2-benzimidazolone by TiO2 and iron(III) catalyst with H2O2 and O2 as electron acceptors
Solar degradation of 5-amino-6-methyl-2-benzimidazolone by TiO2 and iron(III) catalyst with H2O2 and O2 as electron acceptors
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DOI：
10.1016/s0360-5442(03)00190-7
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发表时间：
2004-04
期刊：
影响因子：
9
通讯作者：
V. Sarria;P. Peringer;J. Cáceres;J. Blanco;S. Malato;C. Pulgarin
中科院分区：
文献类型：
--
作者：
V. Sarria;P. Peringer;J. Cáceres;J. Blanco;S. Malato;C. Pulgarin
以5-氨基-6-甲基-2-苯并咪唑酮（AMBI）为主要成分的染料生产废水，通过不同的可生化性试验，确定其为可生化性物质。为了提高这一重要污染物的可生物降解性，探索了太阳能光催化降解方法。在Plataforma Solar de Almeria（Spain）的太阳直射下，使用复合抛物面收集器（CPC）比较了光/TiO 2/O2、光/TiO 2/H2 O2、光/Fe 3 +/O2和光/Fe 3 +/H2 O2系统。铁光辅助系统表现出最有趣的行为，从动力学和工程的角度来看，特别是如果它们的组合（作为预处理）与生物过程被认为是。为了比较这些系统的效率，研究了以下参数的演变：（a）溶解的有机碳和初始化合物浓度，（B）毒性，和（c）处理后溶液的生物降解性。在实验室规模下，使用太阳能灯，光/Fe 3 +/H2 O2系统的降解速率比光/Fe 3 +/O2系统高两倍，但后一系统不需要添加H2 O2，提高了系统的经济性要求。
Wastewater containing mainly 5-amino-6-methyl-2-benzimidazolone (AMBI), used in the manufacture of dyes, was characterized as bio-recalcitrant by means of different biodegradability tests. In order to enhance the biodegradability of this important pollutant, solar photocatalytic degradation methods were explored. The systems light/TiO2/O2, light/TiO2/H2O2, light/Fe3+/O2and light/Fe3+/H2O2were compared under direct sunlight at the Plataforma Solar de Almeria (Spain), using a Compound Parabolic Collector (CPC). The iron photo-assisted systems exhibited the most interesting behaviour, from the kinetic and engineering points of view, especially if their combination (as pre-treatment) with a biological process is considered. To compare the efficiency of these systems, the evolution of the following parameters were studied: (a) the dissolved organic carbon and initial compound concentration, (b) the toxicity, and (c) the biodegradability of treated solution. At lab scale, using a solar lamp, the degradation rate of the system light/Fe3+/H2O2was two times higher than the system light/Fe3+/O2but this last system does not need H2O2addition, improving the economical requirements of the system.