Catalyst preparation method for electrocatalytic degradation of organic wastewater

Abstract

A method for preparing a catalyst for electrocatalytic degradation of organic wastewater, involving a method for preparing a catalyst for treating wastewater. Pretreatment of a coal-based activated carbon carrier: wash the activated carbon carrier with deionized water until it is neutral, cool it, wash it until it is neutral, and ultrasonically clean it for 20 minutes. , and finally dried at 80°C for later use; the catalyst was prepared by in-situ precipitation method: the above-mentioned pretreated coal-based activated carbon powder and amorphous Fe 78 Si 13 B 9 Disperse the powder into distilled water and place it in a three-necked flask. Under the protection of nitrogen atmosphere, add FeSO with a concentration of 1 mol per liter. 4 .7H 2 10-30 ml of O solution, washed 5 times with ethanol alternately, vacuum dried in an oven for 12 hours, the dried reaction product was ground in a mortar and passed through a 200 mesh sieve to obtain coal-based activated carbon loaded amorphous Fe 78 Si 13 B 9 / nano Fe 3 O 4 catalyst. The invention prepares a catalyst that integrates adsorption, catalysis, internal electrolysis, and magnetic separation, which solves the problem of difficulty in separation and recovery of the catalyst and efficient removal of organic matter.

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