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Kinetic analysis and energy efficiency of phenol degradation in a plasma-photocatalysis system

文献类型: 外文期刊

作者: Wang, Hui-juan 1 ; Chen, Xiao-yang 2 ;

作者机构: 1.Jiangsu Univ, Sch Environm, Zhenjiang 212013, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Environm Resource & Soil Fertilizer, Hangzhou 310021, Zhejiang, Peoples R China

关键词: plasma;photocatalysis;synergistic mechanism;kinetic analysis;energy efficiency

期刊名称:JOURNAL OF HAZARDOUS MATERIALS ( 影响因子:10.588; 五年影响因子:10.129 )

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收录情况: SCI

摘要: 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, C50) of phenol oxidation in different reaction systems (plasma alone and plasma-photocatalysis) are reviewed to account for the synergistic mechanism of plasma and photo-catalysis. 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.

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