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首页> 外文期刊>Environmental Science & Technology >Mineralization of Aromatics in Water by Sunlight-Assisted Electro-Fenton Technology in a Pilot Reactor
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Mineralization of Aromatics in Water by Sunlight-Assisted Electro-Fenton Technology in a Pilot Reactor

机译：先导反应器中阳光辅助电芬顿技术在水中的芳香化作用

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摘要

The viability of the degradation of aqueous solutions of aniline, nitrobenzene, and 4-chlorophenol by the so-called Photoelectro-Fenton process in a pilot reactor is reported. The Electro-Fenton process stage, based on the flow of oxygen through a gas diffusion cathode to produce H{sub}2O{sub}2, allows mineralization of about a half of the TOC content in ca. 1 h, because anodic oxidation is coupled with Fenton reaction in the presence of Fe{sup}(2+) catalyst. An intensity of 20 A was applied in a flow cell comprising a Ti/Pt anode and a carbon-PTFE cathode. After electrolysis, samples of the effluent were exposed to sunlight, and almost complete mineralization was reached after ca. 50 min. Effect of parameters such as electrolysis time, pH, initial concentration, and solar or UVA irradiation on the process efficiencies and the running costs are studied. The Photoelectro-Fenton process using sunlight effectively diminishes these costs. The analogous behavior of the three aromatics suggests similar degradation pathways, regardless of the different groups attached to the ring.
机译：据报道，在中试反应器中通过所谓的光电子芬顿法降解苯胺，硝基苯和4-氯苯酚的水溶液的可行性。电-芬顿工艺阶段基于氧气流经气体扩散阴极以产生H {sub} 2O {sub} 2的过程，可实现约一半TOC含量的矿化。 1 h是因为在Fe {sup}（2+）催化剂存在下阳极氧化与Fenton反应耦合。在包括Ti / Pt阳极和碳PTFE阴极的流通池中施加20 A的强度。电解后，废水样品暴露在阳光下，大约在大约10分钟后达到几乎完全的矿化状态。 50分钟研究了诸如电解时间，pH，初始浓度以及太阳或UVA辐照等参数对工艺效率和运行成本的影响。使用太阳光的光电子芬顿工艺可有效降低这些成本。三种芳族化合物的相似行为表明相似的降解途径，而与环上连接的不同基团无关。

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