Method for preparation and application of Cu(II) solid-phase extracting agent based on carbon nanotube

Abstract

The invention relates to a method for preparation and application of a Cu(II) solid-phase extracting agent based on a carbon nanotube. The preparation method comprises the following steps: refluxing 0.5-1g of carboxylated carbon nanotube and 20mL of anhydrous thionyl chloride for 1-2 day(s) at 60-90 DEG C, vacuum-filtering, washing the filtered residue with anhydrous tetrahydrofuran, and vacuum-drying the filtered residue for a night, thereby obtaining an acylated carbon nanotube; and dispersing the acylated carbon nanotube into mixed solution of 0.1g of 2,-2'-bipyridylamine, a mL of triethylamine and 100mL of anhydrous N, N-dimethylformamide, refluxing for 48 hours at 100 DEG C under the nitrogen atmosphere, vacuum-filtering, washing the filtered residue with absolute ethyl alcohol for three times, and then vacuum-drying for 1-2 day(s), thereby obtaining the Cu(II) solid-phase extracting agent based on the carbon nanotube. The application method comprises the following steps: filling 5-10mg of Cu(II) solid-phase extracting agent into a 6mL solid-phase extraction small column of a solid-phase extraction device, carrying out dynamic Cu(II) enrichment for 1-5mug/L of Cu(II)-containing water sample to be tested, and eluting and desorbing the solid-phase extracting agent rich in Cu(II) with 1-3M of dilute nitric acid, thereby recovering the Cu(II). The recovery rate of the Cu(II) reaches 97 percent, and the desorbed Cu(II) solid-phase extracting agent can be recycled for 4-5 times.

Description

Preparation and application method of Cu(II) solid-phase extraction agent based on carbon nanotubes technical field The invention relates to a preparation and application method of a Cu(II) solid phase extraction agent based on carbon nanotubes, in particular to a solid phase for enriching trace heavy metal copper ions (Cu(II)) in environmental water bodies and liquid samples Preparation of extractant and its application method. The invention belongs to the technical field of separation, analysis and detection. Background technique Copper metal is an element that exists widely in nature. Due to its good physical and chemical properties, copper metal has a wide range of uses in industry, and with the development of science and technology, its application range is continuously expanding, which makes copper in the environment sustainable. increase, leading to copper pollution in the environment. Copper is extremely toxic to aquatic organisms. When the concentration of copp...

AI Technical Summary

Problems solved by technology

However, mature commercial products are still relatively lacking, so it is still of great significance to develop new efficient, simple and fast Cu(II) solid phase extraction materials.