Catalyst preparation method for electrocatalytic degradation of organic wastewater

Abstract

The invention provides a preparation method of a catalyst used for electrical catalytic degradation of organic wastewater and relates to a preparation method of a wastewater treatment catalyst. The preparation method comprises the following steps: carrying out pretreatment on a coal-based activated carbon carrier, namely washing the activated carbon carrier to be neutral with deionized water, cooling, then washing to be neutral, carrying out ultrasonic cleaning for 20 minutes, and finally drying at the temperature of 80 DEG C for later use; and preparing a catalyst by adopting an in situ precipitation method, namely dispersing the pretreated coal-based activated carbon powder and amorphous Fe78Si13B9 powder into distilled water and putting in a three-mouth flask, under the protection of nitrogen atmosphere, adding 10-30ml of FeSO4.7H2O solution with the concentration of 1mol / L, alternately washing with ethanol for five times, carrying out vacuum drying for 12 hours by virtue of a drying oven, grinding a dried reaction product in a mortar, and screening by virtue of a 200-mesh sieve, so that a coal-based activated carbon supported amorphous Fe78Si13B9 / nano Fe3O4 catalyst is obtained. The prepared catalyst integrates adsorption, catalysis, internal electrolysis and magnetic separation into a whole, and solves the problems that the catalyst is difficult to separate and recycle and efficient removal of an organic matter is difficult.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for treating wastewater, in particular to a method for preparing a catalyst for electrocatalytically degrading organic wastewater. Background technique [0002] In recent years, with the rapid development of papermaking, plastics, textiles and other industries, people have synthesized more and more organic substances, among which the types and quantities of refractory organic pollutants that pose a serious threat to human health and the ecological environment are also increasing. Many, accompanied by a large amount of organic pollutant wastewater. Since most of the residual organic substances in wastewater are refractory substances, it is difficult to meet the standard of refractory organic wastewater treatment by traditional wastewater treatment methods such as physicochemical and biochemical methods at this stage. Therefore, advanced treatment of organic wastewater is necessary. In recent ye...

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Problems solved by technology

The patent application whose publication number is CN104383953 A discloses a cobalt catalyst supported by activated carbon and its preparation method and application. The preparation conditions of this method are harsh, and hydrogen peroxide is needed when degrading waste water, which greatly increases the cost of degrading waste water, and the effect is low. Cobalt is a toxic metal that is prone to secondary pollution

The publication number is CN 105457643 A, a method for preparing an activated carbon-supported catalyst for electrocatalytic degradation of organic wastewater. In this method, rare earth metals are used to increase the production cost, the catalyst is not easy to recycle, and secondary pollution is likely to occur