Method for recovering zinc ions in willemite ore wastewater

Abstract

The present invention discloses a method for recovering zinc ions in willemite ore wastewater. The method comprises: (1) soaking chlorine balls in N,N-dimethylformamide adopted as a reaction solvent until the chlorine balls completely swell; (2) adding p-aminobenzoic acid adopted as a ligand to the product obtained in the step (1), adding a catalyst, and at a reaction temperature of 80-120 DEG C, carrying out a heating stirring reaction for 10 min under nitrogen protection; (3) filtering the product obtained in the step (2) to obtain a filter cake, soaking and washing the filter cake with the N,N-dimethylformamide adopted as the reaction solvent until the washing liquid is colorless, washing with distilled water, soaking with a NaOH solution, washing with distilled water, and washing sequentially with absolute alcohol, acetone and diethyl ether, and carrying out vacuum drying at a temperature of 50 DEG C to obtain an adsorption function resin; and (4) accurately weighing 15 mg of the dried resin, adding an acetic acid-sodium acetate buffer solution, soaking overnight, taking 50-100 mL of a supernatant after the willemite ore wastewater naturally precipitates, adding the swelling resin and the remaining acetic acid-sodium acetate buffer solution, taking out the resin after 10 h, and washing with a 0.5-2 mol / L HCl, wherein the washed solution is the zinc ion solution.

Description

technical field [0001] The invention relates to resin preparation and application methods, in particular to a synthetic resin method with high efficiency recovery, good adsorption performance and reusability for treating zinc ions in silicon-zinc ore wastewater and a method for recovering zinc ions in silicon-zinc ore wastewater. Background technique [0002] With the continuous development of society, the development of industry is also making progress, followed by the treatment of various industrial wastewater. Now people are beginning to pay more and more attention to the impact of heavy metal pollution on human body and water ecology. Because heavy metal pollutants are difficult to degrade in the environment, they can be gradually enriched through the food chain, and finally accumulate in animals and plants, so that the concentration can increase hundreds of times. Many environmental pollution incidents are related to heavy metal pollution, which is the most harmful poll...

AI Technical Summary

Problems solved by technology

[0004] The ion exchange resin method has the above-mentioned advantages, but there is still a biggest defect, that is, the adsorption time of the existing methods is generally long, although the adsorption capacity can reach 200mg / g or even close to 300mg / g, but most of them need one to two days , the time cost is too high and the efficiency is low for the recovery of seriously polluted zinc

However, the current fast adsorption method generally does not have a high adsorption capacity, and the adsorption capacity can only hover at 70-80 mg / g, which cannot meet the demand.

And the treatment of silicon-zinc ore wastewater contains trace amounts of metal ions such as Fe and Mn. If it is discharged directly, it will cause environmental pollution

Images