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Effect of air pressure on the electro-Fenton process at carbon felt electrodes
Electrochimica Acta ( IF 5.5 ) Pub Date : 2018-04-06
J.F. Perez, S. Sabatino, A. Galia, M.A. Rodrigo, J. Llanos, C. Sáez, O. Scialdone

The effect of air pressure on electro-Fenton (PrEF process) was evaluated using two organic substances (maleic acid and Acid Orange 7) as model organic pollutants. First experiments were performed using a conventional carbon felt (CF) cathode. At room pressure, a slow removal of maleic acid was obtained, together with the generation of formic acid. Conversely, using pressurized air, the removal of maleic acid was dramatically accelerated and the formation of formic acid was not detected. The utilization of a carbon felt modified by the deposition of carbon black + PTFE mixture (MCF) and of pressurized air allowed to achieve even faster and almost total (>95%) removal of total organic carbon (TOC). Interestingly, the abatement resulted higher than the one obtained previously by direct anodic oxidation at boron doped diamond under comparable conditions. Similarly, in the case of Acid Orange 7 (AO7) the removal of the TOC increased with the pressure using both CF and the MCF. In particular, high removal of TOC (close to 80%) was obtained using the MCF at high current density (100 mA cm−2) under pressurized air.



中文翻译:

气压对碳毡电极上的电子芬顿过程的影响

使用两种有机物质(马来酸和酸性橙7)作为模型有机污染物,评估了气压对电子芬顿(PrEF工艺)的影响。使用常规的碳毡(CF)阴极进行首次实验。在室温下,获得了马来酸的缓慢去除以及甲酸的产生。相反,使用加压空气,马来酸的去除被显着加速,并且没有检测到甲酸的形成。通过沉积炭黑+ PTFE混合物(MCF)和压缩空气而改性的碳毡的使用,可以实现更快,几乎全部(> 95%)的总有机碳(TOC)去除。有趣的是,结果表明,在可比条件下,该消除方法的结果要高于先前在掺硼金刚石中直接进行阳极氧化而获得的结果。类似地,在使用酸性橙7(AO7)的情况下,同时使用CF和MCF时,TOC的去除量会随压力的增加而增加。尤其是,使用MCF在高电流密度(100 mA cm)时,TOC的去除率很高(接近80%)。−2)在压缩空气下。

更新日期:2018-04-07
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