Water-soluble ternary polymer molecular brush anionic dye capture settling agent, and preparation method and application thereof

Abstract

The invention relates to a water-soluble ternary polymer molecular brush anionic dye capture settling agent, and a preparation method and application thereof. The water-soluble ternary polymer molecular brush anionic dye capture settling agent is characterized by being prepared by a polymer main-chain poly(hydroxyethyl acrylamide), a cationic high-molecular side-chain poly(methacrylatoethyl trimethyl ammonium chloride) containing carboxyl groups at tail ends, a functional high-molecular side-chain precursor polymer poly(N-vinylformamide) containing carboxyl groups at tail ends, water, a catalyst which is N-hydroxysuccinimide, a 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide iodomethane salt, potassium hydroxide, 1,2-cyclohexane diamine tetraacetic acid dianhydride and carbon disulfide, andthe water-soluble ternary polymer molecular brush anionic dye capture settling agent is used for treating dye wastewater or artistic coating wastewater discharged during dye synthesis or dyeing and finishing processes. The capture settling agent provided by the invention has the advantages that the capturing capacity is good, the sedimentation speed is high, complex heavy metal ions can be treated, anionic dye and complexing heavy metal ions can be captured within a plurality of seconds, large aggregate precipitates can be rapidly grown within 10 seconds, and therefore rapid dye separation can be realized.

Description

technical field [0001] The invention belongs to the field of water treatment technology and polymer functional materials, and specifically relates to a water-soluble ternary polymer molecular brush anionic dye capture and sedimentation agent and its preparation method and application. It is mainly discharged during the dye synthesis or dyeing and finishing process. It can be used in dye wastewater or art paint wastewater, and can simultaneously remove anionic dyes 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...

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.