Waste water treatment catalyst and preparation method thereof

Abstract

The invention relates to a waste water treatment catalyst and a preparation method thereof. The catalyst of the invention takes active carbon as a carrier and one or several of oxides of metals such as copper, iron, manganese, vanadium, zinc and titanium as an active ingredient. The preparation method comprises: firstly, preparing high-temperature active carbon carrier at 350 to 700 DEG C; secondly, immersing the high-temperature active carbon carrier in the immersion liquor containing active metal components or spraying immersion liquor containing active metal components to immerse the high-temperature active carbon carrier so as to load a catalytic active component onto the active carbon carrier quickly; and finally, cooling, washing and drying to obtain the catalyst. The catalyst prepared by the method has the advantages that the content of the active metal components is high, and the active metal components are insusceptible to loss in waste water. The catalyst is mainly used in the catalytic oxidization treatment process of waste water.

Description

technical field [0001] The invention relates to a preparation method of a wastewater treatment catalyst, in particular to a preparation method of a catalytic oxidation catalyst for wastewater treatment. Background technique [0002] With the increasingly stringent global environmental protection regulations, the control indicators for sewage discharge standards are getting higher and higher. Under this form, wastewater catalytic oxidation treatment methods have been paid more and more attention to and adopted by people, such as the catalytic wet method of high-concentration sewage Oxidation, electrolytic catalytic oxidation, photocatalytic oxidation, advanced oxidation, etc. In the process of catalytic oxidation of wastewater, in order to obtain the ideal treatment effect and keep the cost of wastewater treatment low by reducing the reaction temperature and pressure, the preparation of cheap catalysts with high active components, high strength and high stability has undoubte...

AI Technical Summary

Problems solved by technology

[0008] However, the analysis of the above catalyst impregnation or spray-dipping preparation methods shows that this conventional catalyst preparation method has problems such as low loading of active components, poor uniform dispersion, raw material utilization, cumbersome preparation process and long time.

The main reason is that conventional activated carbon carriers are mostly micropores, mesopores, and macropores, and the area of ​​micropores with a pore size less than 10 Å accounts for more than 80% of the total surface area, resulting in many macromolecular inorganic salts containing active metal components, Organic salts or oxides are blocked due to the sieving effect. Even if they maintain a long residence time, it is difficult to adsorb and deposit on the inner surface through the micropores of activated carbon, so that the absolute majority of the inner pore surface is not fully utilized. The loading rate is low; and some active metals with low molecular or ion diameters and strong adsorption can be freely deposited and adsorbed in the micropores of activated carbon, but due to the large number of irregular particles in the process of molecular or ion movement Large pores and hollow, limited by the movement resistance, the amount of active components that will be adsorbed or deposited will also be greatly reduced, and will require a longer residence time; due to the uneven distribution of the activated carbon carrier pore size, it determines the activity of the loaded carbon. The dispersion of the metal is uneven; in addition, in order to remove the impurities in the micropores of the active carrier, it is necessary to carry out repeated acid washing, alkali washing and deionized water washing, which makes the catalyst preparation process long and expensive, and there are subsequent environmental protection problems. a series of questions, etc.