Integral multichannel electrode for sequentially reducing and oxidizing halogenated organic matters

Abstract

The invention discloses an integral multichannel electrode for sequentially reducing and oxidizing halogenated organic matters. The electrode is provided with a plurality of rows of orderly and vertically communicated pore passages, and the inner surfaces of the pore passages of the electrode are uniformly loaded with two catalysts with a nano structure; wherein the catalyst loaded on the upper half part is a noble metal nano particle catalyst, and the catalyst loaded on the lower half part is an iron oxide catalyst. When the integral multichannel electrode is used as a cathode for treating halogenated organic matters, pollutants are firstly adsorbed to the surface of the electrode, and atoms H* generated by electrolyzing water and the halogenated matters carry out hydrogenation and dehalogenation reactions to generate an intermediate product; hydrogen peroxide generated by cathode oxygen reduction generates .OH under the action of ferrous ions, and the de-halogenated intermediate product is thoroughly mineralized. When the integral multichannel electrode is used for treating halogenated organic matters, the reduction and mineralization of the halogenated organic matters can be realized in one step, the diffusion distance of pollutants can be effectively shortened, the mass transfer is promoted, and the removal efficiency of the pollutants is obviously improved.

Description

technical field [0001] The present invention relates to a monolithic multi-channel electrode for the sequential reduction and oxidation of halogenated organic compounds. Background technique [0002] Halogenated organic pollutants (HOPs) have the characteristics of environmental persistence, refractory biodegradation, bioaccumulation, and high toxicity. A large number of uses and discharges make HOPs in water bodies increasingly serious, threatening ecological security and human health. The complete removal of HOPs Halogen and mineralization have important application value in environmental governance. [0003] The widely studied advanced oxidation method mainly uses highly active oxidizing free radicals to react rapidly with HOPs to achieve the purpose of removing pollutants. However, the removal efficiency of HOPs will decrease significantly with the increase of the number of halogen atoms, and the oxidation process may produce More toxic and hazardous products (such as d...

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