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首页> 外文期刊>RSC Advances >Mechanistic insight into active chlorine species mediated electrochemical degradation of recalcitrant phenolic polymers
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Mechanistic insight into active chlorine species mediated electrochemical degradation of recalcitrant phenolic polymers

机译：活性氯物种介导的难降解酚醛聚合物电化学降解的机理研究

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摘要

Degradation of recalcitrant phenolic syntan by electro-oxidation was investigated. The kinetics of degradation of phenolic syntan was followed both in terms of TOC and COD measurements. The generation of oxidants such as Cl-2, HOCl and free radicals of oxychloride in the presence of NaCl electrolyte was also monitored and their role in the oxidation of organics was discussed. The generation of (ClO)-Cl-center dot free radicals was ascertained by electron spin resonance (ESR) spectroscopy coupled with the spin trapping technique. The effect of pH, electrolyte concentration and current density on the degradation of phenolic syntan was discussed. Also, the current efficiency (CE) and energy consumption (EC) were estimated. It was observed that the oxidation of phenolic syntan was proportional to the current density and electrolyte concentration. The kinetics of the degradation of phenolic syntan was found to follow first order rate equation with an R-2 value of 0.9966. The intermediate compounds formed during electrooxidation were characterised using AOX, FT-IR and NMR techniques and the degradation pathway proposed. These results clearly suggest the effectiveness of the electrochemical technique for the treatment of wastewater containing a high concentration of phenolic syntan.
机译：研究了电氧化降解难降解的酚类合成鞣剂。在TOC和COD方面都遵循了酚类合成鞣剂的降解动力学。还监测了在NaCl电解质存在下氧化剂如Cl-2，HOCl和氯氧化物自由基的产生，并讨论了它们在有机物氧化中的作用。 （ClO）-Cl-中心点自由基的产生是通过电子自旋共振（ESR）光谱结合自旋俘获技术确定的。讨论了pH，电解质浓度和电流密度对酚类合成鞣剂降解的影响。此外，还估算了电流效率（CE）和能耗（EC）。观察到酚类合成鞣剂的氧化与电流密度和电解质浓度成正比。发现酚类合成鞣剂的降解动力学遵循一级速率方程，R-2值为0.9966。使用AOX，FT-IR和NMR技术对在电氧化过程中形成的中间化合物进行了表征，并提出了降解途径。这些结果清楚地表明了电化学技术用于处理含有高浓度酚类合成鞣剂的废水的有效性。

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