School of the Environment, Jiangsu University, Zhenjiang 212013, China.
J Hazard Mater. 2011 Feb 28;186(2-3):1888-92. doi: 10.1016/j.jhazmat.2010.12.088. Epub 2010 Dec 27.
Combination of two kinds of advanced oxidation processes (AOPs) is an effective approach to control wastewater pollution. In this research, a pulsed discharge plasma system with multi-point-to-plate electrode and an immobilized TiO(2) photocatalysis system is coupled to oxidize target pollutant in aqueous solution. Kinetic analysis (pseudo-first order kinetic constant, k) and energy efficiency (energy yield value at 50% phenol conversion, G(50)) of phenol oxidation in different reaction systems (plasma alone and plasma-photocatalysis) are reviewed to account for the synergistic mechanism of plasma and photocatalysis. The experimental results show that higher k and G(50) of phenol oxidation can be obtained in the plasma-photocatalysis system under the conditions of different gas bubbling varieties, initial solution pH and radical scavenger addition. Moreover, the investigation tested hydroxyl radical (OH) is the most important species for phenol removal in the synergistic system of plasma-photocatalysis as well as in the plasma alone system.
两种高级氧化工艺（AOPs）的结合是控制废水污染的有效方法。本研究将多点板式脉冲放电等离子体系统与固定化 TiO2 光催化系统耦合，以氧化水溶液中的目标污染物。通过动力学分析（准一级动力学常数 k 和 50%苯酚转化率时的能量效率 G(50)）研究了不同反应体系（单独等离子体和等离子体-光催化）中苯酚氧化的协同机制。实验结果表明，在不同气体鼓泡种类、初始溶液 pH 值和自由基清除剂添加条件下，等离子体-光催化体系中苯酚氧化的 k 和 G(50)更高。此外，研究表明，在等离子体-光催化协同体系以及单独等离子体体系中，羟基自由基（OH）是苯酚去除的最重要物种。
