形稳阳极电解处理有机废水机理及动力学的研究

Study on the Mechanism and Kinetics of Organics Degradation in Wastewater Using Dimensional Stable Anode

采用简便易行的方法对形稳阳极电解催化降解有机废水的机理进行了研究,表明在电解过程中能够产生氧化能力极强的HO·自由基,可以氧化降解废水中的有机污染物,即有机污染物以间接氧化的方式降解,这是电解催化氧化技术的主要机理。用非线性最小二乘法对实验数据的分析表明,其过程基本符合两步一级模型,并得到了水杨酸降解过程中的两步速率常数。

A simple and convenient detecting means of HO- radicals and self-made DSA (Dimensional Stable Anodes), with special technology, were employed in this study. The results showed that a mass of HO-radicals, with very high oxidation ability, could be produced during electrolysis, oxidized the organic pollutants in wastewater, and degraded in an indirect way, which is the main mechanism of electrolysis catalysis oxidation technology. The electrolysis catalysis oxidation technology is one of AOT (Advanced Oxidation Technologies). The experimental date analysis with non-linear least-squares algorithm showed that the reaction was in accordance with two-step first-order model basically. The two-rate constant of salicylic acid degradation process and the 510nm Moore absorbency index of 2,3-dihydroxybenzoic acid has also been obtained.