Preparation and application methods of hexavalent chromium ion blotting compound membrane with 4-vinyl pyridine as functional monomer

Abstract

The invention relates to preparation and application methods of a hexavalent chromium ion blotting compound membrane with 4-vinyl pyridine as the functional monomer and belongs to the technical fieldof heavy metal ion absorption separation. According to the preparation method of the hexavalent chromium ion blotting compound membrane with the 4-vinyl pyridine as the functional monomer, hexavalentchromium ions serve as the template ions, the 4-vinyl pyridine serves as the functional monomer, glycol dimethacrylate serves as the cross-linking agent, azobisisobutyronitrile serves as the initiator, a mixed solution of organic solvent and water at a volume ratio of 1:1 serves as the pore-forming solvent, and a surface grafting method is applied to a support membrane to prepare the hexavalent chromium ion blotting compound membrane with the 4-vinyl pyridine as the functional monomer. The hexavalent chromium ion blotting compound membrane with the 4-vinyl pyridine as the functional monomer isprepared by taking an existing commercial membrane as the support membrane and through metal ion blotting technology, is simple in preparation method and high in stability and environment adaptability, and can be applied in extreme solution environments to absorption separation of hexavalent chromium ions in Cr (VI)-containing solutions.

Description

technical field [0001] The invention relates to a preparation method and application of a hexavalent chromium ion imprinted composite membrane using 4-vinylpyridine as a functional monomer, and belongs to the technical field of heavy metal ion adsorption and separation. Background technique [0002] With the development of electroplating, leather, and metallurgical industries, a large amount of waste water containing heavy metal ions is discharged, which has brought great harm to the environment and living organisms. Among them, chromium ions are one of the heavy metal ion pollutants, and different forms of chromium have great impact on the environment. The hazards are different. Compounds of divalent chromium ions are considered non-toxic. A small amount of trivalent chromium ions is beneficial to the activation of insulin, while hexavalent chromium ions are one of the major carcinogens and can induce major diseases such as liver cancer and lung cancer. Therefore, , the ads...

AI Technical Summary

Problems solved by technology

Although the above methods have achieved certain results, there are still many disadvantages. For example, the chemical precipitation method will cause secondary pollution, the electrolysis method will increase energy consumption and hinder economic benefits, and liquid-liquid extraction and liquid membrane separation require a large amount of high-purity organic solvents. , high cost, will pollute the environment