Preparation of magnetic nano ferromanganese oxyhydroxide and application of magnetic nano ferromanganese oxyhydroxide in catalytic ozonation to remove pollution

Abstract

The invention discloses a preparation method of a catalyst for purifying a water body containing PPCPs (Pharmaceuticals and Personal Care products) such as phenacetin according to the shortcomings and the defects of the existing water treatment technology for removing PPCPs such as trace amount of phenacetin in water. The catalyst (magnetic nano ferromanganese oxyhydroxide) adopts manganese salts and ferrates as key active components, and integrates the surface characteristics of bimetal oxyhydroxides such as Fex(OH)y and Mnx(OH)y, not only is large specific surface area achieved, and simultaneously, high surface hydroxyl density is another important factor for providing the catalytic activity. More importantly, the magnetic nano ferromanganese oxyhydroxide is magnetic, and a magnetic field can be adopted for separating the catalyst in a powder state from an aqueous phase. The catalyst can be applied to ozone catalytic-oxidation technology, and has the advantages that the effect of removing PPCPs such as phenacetin in the water body can be effectively improved, the effect of removing pollution such as phenacetin is achieved, and discharged water with good quality and stability is obtained, so that the catalyst is wide in application prospect.

Description

technical field [0001] The invention relates to the preparation of a magnetic nano-manganese iron oxyhydroxide catalyst and its catalytic ozone oxidation decontamination technology. Background technique [0002] In recent years, new pollutants—pharmaceuticals and personal care products (PPCPs) with “three-caused” effects or endocrine disrupting effects—have emerged in the surface water environment, arousing extensive attention from scholars from all over the world. Due to the extensive use of PPCPs by humans and livestock, the exposure types and concentrations of PPCPs in urban sewage showed an increasing trend. Exposure to PPCPs such as artificial musk, antibiotics, and steroid estrogens has also been found in surface water and urban sewage treatment plants in my country, with exposure concentrations ranging from tens of ng / L to hundreds of μg / L. Although the concentration of PPCPs in sewage is low, its impact on human health and ecological environment has long-term, poten...

AI Technical Summary

Problems solved by technology

[0007] Generally, the separation conditions of heterogeneous solid catalysts are simple, and some catalysts do not even need to be separated (such as gas-solid two-phase catalysis), with less secondary pollution, and can be operated in uninterrupted flow; but most heterogeneous catalysts are sintered by high temperature or hydrothermal The oxides produced have limited catalytic activity points on the surface, relatively poor catalytic activity and unstable catalytic performance

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