Water-soluble binary chelating polymer molecular brush cationic dye trapping agent and preparation method and application thereof

Abstract

The invention relates to a binary chelating polymer molecular brush cationic dye trapping agent and a preparation method and application thereof. The water-soluble binary chelating polymer molecular brush cationic dye trapping agent is characterized by being prepared from polymer main chain such as polyhydroxyethyl acrylamide, anionic macromolecule side chain precursor polymer polymethylacrylic acid tert-butyl ester containing carboxyl at tail end, functional macromolecule side chain precursor polymer poly-N-vinyl amino formamide containing carboxyl, a dimethylformamide solvent, a catalyst (N-hydroxy succinimide), 1-ethyl-3-(3-dimethylamino propyl)carbodiimide iodomethane, potassium hydroxide, and ethylene glycol diethyl ether diamine tetraacetic dianhydride; the water-soluble binary chelating polymer molecular brush cationic dye trapping agent is used for treating the drained dye wastewater or art coating wastewater in the dye synthesizing or dyeing and finishing process. The binary chelating polymer molecular brush cationic dye trapping agent has the advantages that the trapping ability is strong, the precipitation speed is quick, the complex heavy metal ion can be treated, the cationic dye molecules and the complex heavy metal ions can be trapped in several seconds, and can be quickly grown into large precipitation particles, the purpose of separating dyes is realized, the operation is simple and convenient, the treatment cost is low, the suitability is strong, and the like.

Description

technical field [0001] The invention belongs to the field of water treatment technology and polymer functional materials, and specifically relates to a binary chelating polymer molecular brush cationic dye capture agent and its preparation method and application, which is mainly discharged during dye synthesis or dyeing and finishing processes It is applied in dye wastewater and art paint wastewater to realize simultaneous removal of cationic dye molecules and complexed heavy metal ions in dye wastewater. Background technique [0002] In recent years, my country's annual sewage discharge has reached more than 39 billion tons, of which industrial sewage accounts for 51%, while dye wastewater accounts for 35% of the total industrial wastewater discharge, and it is increasing at a rate of 1% year by year. Dye wastewater mainly comes from dye synthesis and dye use enterprises, and is composed of dyes and auxiliaries discharged during the synthesis or dyeing and finishing process...

AI Technical Summary

Problems solved by technology

However, the chemical structure of polyacrylamide is relatively simple, and there are problems such as poor ability to capture dye molecules, slow sedimentation speed, and inability to deal with complexed heavy metal ions.