Method for hydrothermally preparing adsorption material for heavy metal in wastewater

Abstract

The invention discloses a method for hydrothermally preparing an adsorption material for a heavy metal in wastewater. The method comprises the following steps of mixing and dissolving potassium metaaluminate and potassium hydroxide in water, then adding silica sol, agitating for a period of time, and then obtaining primary mixed liquor; putting the primary mixed liquor into a stainless steel reaction kettle, and reacting for a period of time at a certain temperature; filtering, washing and oven-drying a product after the reaction is finished, so as to obtain a primary solid; adding the primary solid into a solution containing ammonium chloride, and agitating the solution in a heating condition; filtering the agitated solution, so as to obtain a final solid; cooling the final solid; drying the cooled final solid; grinding the dried final solid, and then obtaining a zeolite adsorption material. The method is simple in preparation process and is green and environment-friendly; the reaction condition is easily reached; the energy consumption is low and the zeolite adsorption material is high in purity and good in adsorption effect.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for hydrothermally preparing an adsorption material for heavy metals in wastewater. Background technique [0002] With the continuous development of human society, while economic development brings benefits, it also produces a lot of pollution. The rapid increase of industrial "three wastes" and the increase of vehicle exhaust emissions have become increasingly serious pollution of soil, water and plants in the human living environment, which has become a prominent ecological problem in the coordinated development of economy, society and environment. Heavy metals are generally not biodegradable, and once they enter water or soil, they are difficult to remove. They can enter the human body through the food chain and cause many diseases (such as cancer, etc.). [0003] Adsorption is an effective physical and chemical water treatment method, which is often used to p...

AI Technical Summary

Problems solved by technology

[0006] However, the synthesis cost of existing zeolite molecular sieves is relatively high, and the synthesis yield of zeolite molecular sieves is also low. Therefore, it is necessary to explore new and green molecular sieve synthesis routes, devote ourselves to reducing the synthesis cost of molecular sieve materials, and find new breakthroughs in molecular sieve synthesis. Promote the application of molecular sieves in industrial fields