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首页> 外文期刊>Journal of Photochemistry and Photobiology, A. Chemistry >Environmental remediation by an integrated microwave/UV illumination technique VI. A simple modified domestic microwave oven integrating an electrodeless UV-Vis lamp to photodegrade environmental pollutants in aqueous media
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Environmental remediation by an integrated microwave/UV illumination technique VI. A simple modified domestic microwave oven integrating an electrodeless UV-Vis lamp to photodegrade environmental pollutants in aqueous media

机译：通过集成的微波/紫外线照明技术进行环境修复VI。一种简单的改进型家用微波炉，集成了无电极UV-Vis灯，可降解水介质中的环境污染物

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摘要

A simple device is described based on a modified domestic microwave oven that incorporates an UV-Vis lamp encased in Teflon to photodegrade environmental pollutants in aqueous media. The performance of this device was examined using the photodegradation of the agrochemical pollutant 2,4-dichlorophenoxyacetic acid (2,4-D) as the test process driven by a coupled photocatalytic/microwave method in an aqueous TiO_2 dispersion. The aqueous dispersion was contained in a high-pressure Teflon batch (TB) reactor that also integrated a double glass cylindrical plasma lamp (DGCPL) as the source of the UV-Vis radiation. This DGCPL lamp contained mercury gas with a minute amount of neon gas and was powered solely by microwave radiation. The coupled microwave-UV-Vis irradiation of the TB-DGCPL reactor led to an enhancement of the decomposition of the 2,4-D target substrate in the modified microwave oven relative to the photocatalytic method alone. Specifically, the rates of degradation were 2 * 10~(-3) mM min~(-1) (photocatalytic/microwave method (PD/MW)) and 1.1 * 10~(-3) mM min~(-1) (photocatalytic method (PD)) even though the light irradiance was some six-fold greater in the latter method. That is, the coupled PD/MW method was about 10 times more efficient than the PD method alone.
机译：描述了一种基于改进型家用微波炉的简单设备，该家用微波炉结合了装在聚四氟乙烯中的UV-Vis灯，可光降解水性介质中的环境污染物。使用农业化学污染物2,4-二氯苯氧基乙酸（2,4-D）的光降解作为测试过程，通过光催化/微波耦合法在水性TiO_2分散液中测试了该设备的性能。水分散体包含在高压特氟隆间歇（TB）反应器中，该反应器还集成了双玻璃圆柱等离子灯（DGCPL）作为UV-Vis辐射源。这种DGCPL灯包含汞气体和少量的氖气，仅由微波辐射供电。相对于单独的光催化方法，TB-DGCPL反应器的微波-UV-Vis耦合辐照导致改进型微波炉中2,4-D目标底物的分解增强。具体地，降解速率为2 * 10〜（-3）mM min〜（-1）（光催化/微波法（PD / MW））和1.1 * 10〜（-3）mM min〜（-1）（光催化方法（PD）），即使在后者方法中，光辐照度要大六倍。也就是说，PD / MW耦合方法的效率比单独的PD方法高约10倍。

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