A kind of preparation method of slow-release nickel-based catalytic flocculant

Abstract

The invention discloses a preparation method of a slow-release nickel-based catalytic flocculant. The slow-release nickel-based catalytic flocculant is prepared from corn starch, polyacrylamide, carboxymethyl chitosan, rice hull, sodium metaaluminate, nickel nitrate and the like as raw materials. The modified corn starch is used as the raw material, so that the slow-release nickel-based catalyticflocculant is non-toxic and easily degradable; the charge neutralizing and adsorption bridging effects between the slow-release nickel-based catalytic flocculant and particles in water can be achieved; mayenite is prepared from calcium hydroxide and aluminum hydroxide and is compounded with a nickel-based catalyst, and a free oxygen structure therein is used for improving the carbon deposition resistance of the nickel-based catalyst so as to enhance the catalytic performance; the slow-release nickel-based catalytic flocculant has ideal adsorption strength and adsorption amount, can effectivelyprecipitate, adsorb and degrade various pollutants in water for facilitating subsequent water treatment, and can be widely applied to the flocculation treatment process of domestic sewage, industrialwastewater and the like.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method of a slow-release nickel-based catalytic flocculant. Background technique [0002] With the rapid development of industry and agriculture in our country, a large amount of waste is discharged into the water, and the water resource crisis is becoming more and more serious. At present, water pollution and water shortage are becoming more and more important factors restricting economic development. In order to save water resources, improve water utilization, reduce and eliminate the harm caused by water pollution to human beings and the environment, it is necessary to strengthen water treatment. Among them, coagulation technology is the most commonly used treatment technology, and its effect determines the operation status, effluent water cost and cost of the subsequent water body treatment process. [0003] The coagulation process refers to the proces...

AI Technical Summary

Problems solved by technology

Although the traditional single-component flocculants are cheap, they are added in a large amount and will generate a large amount of sludge. Some composite flocculants are prone to precipitation or precipitation and are unstable, which limits their application in process production and commercialization. promotion and application

[0004] The nickel-based catalyst has excellent catalytic cracking performance of benzene and other organic pollutants. Inserting it into the flocculant preparation can increase the number of organic catalytic cracking surface active centers in the flocculant, increase the rate of carbon-hydrogen bond breakage in pollutants, and realize Adsorption and degradation of pollutants, but because single-metal nickel-based catalysts are prone to carbon deposition and deactivation, it is necessary to find a good composite material and carrier to make the catalyst have the ability to resist carbon deposition and hydrogen sulfide, thereby enhancing the performance of the catalyst