Novel manganese-cobalt complex oxide nanoparticle modified ceramic membrane, and assembly and application method thereof in water treatment

Abstract

The invention relates to an advanced water treatment technique for pollution removal through heterogeneous catalytic ozonation. Directed at the disadvantage that a conventional powdery catalyst is unfavorable for realizing separation and inactivation in a water phase, an assembly method for a novel manganese-cobalt complex oxide nanoparticle catalyst-loaded ceramic membrane is provided. The assembly method aims to combine heterogeneous ozonation with a ceramic membrane filtration technique, and utilizes a ceramic membrane structure and active components (MnO2 and Co3O4) on a catalytic layer to catalyze ozone so as to generate -OH with high oxidation capacity, wherein organic compounds can realize reinforced removal of pharmaceutical and personal care products (PPCPs) like 2-hydroxyl-4-methoxybenzophenone in water through direct reaction with molecular ozone or reaction with -OH generated by ozone decomposition; meanwhile, ozone can react with humic acid and natural organic matters (NOMs) in the water, so the formation of membrane pollution is effectively controlled. The manganese-cobalt complex oxide nanoparticles are loaded on the surface of the ceramic membrane, so separation of the catalyst from the water is realized, and a novel method for cleaning and repeated use of the catalyst is provided.

Description

technical field [0001] The invention relates to the assembly of a manganese-cobalt composite oxide nano-particle modified catalytic ceramic membrane and its application in catalytic ozone oxidation and pollution removal technology. Background technique [0002] In recent years, with the development of the pharmaceutical and personal care industries, pharmaceutical and personal care products (PPCPs), as an emerging pollutant, have received increasing attention. Many PPCPs components have strong biological activity, optical rotation and polarity, and most of them exist in the environment in trace concentrations, ranging from ng / L to μg / L. The use of veterinary medicine, agricultural medicine, human medicine and cosmetics is the main way it is introduced into the environment. Most of the PPCPs are discharged into the sewage in the original or transformed form into the sewage treatment plant, and the representative substances of the detected PPCPs include antimicrobial drugs, a...

AI Technical Summary

Problems solved by technology

However, in the process of membrane filtration, the particles, colloidal particles or solute macromolecules in the water are adsorbed or deposited on the surface of the membrane or in the pores of the membrane due to the physical, chemical or mechanical interaction with the membrane, resulting in a smaller or smaller membrane pore size. Clogging, leading to membrane fouling in which the permeate flow rate and separation characteristics cannot be reduced

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