Efficient dye flocculant as well as preparation method and application thereof

Abstract

The invention relates to an efficient dye flocculant as well as a preparation method and an application thereof. The efficient dye flocculant is characterized being prepared from a polymer main chainPHAM (poly(hydroxymethyl acrylamide)), cationic polymeric side chain PDMC-COOH (polymethacryloxyethyltrimethyl ammonium chloride containing carboxyl at the tail end), anionic polymeric side chain precursor PtBMA-COOH (poly(tert-butylmethacrylate) containing carboxyl at the tail end), functional polymeric side chain precursor PNVF-COOH (poly(N-vinylformamide) containing carboxyl at the tail end), DMF (dimethylformamide) solvent, a catalyst, namely, NHS (N-hydroxysuccinimide), EDC.CH3I (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide methiodide), potassium hydroxide and CDTAD (cyclohexanediamine tetraacetic acid dianhydride), and the efficient dye flocculant is used for treating dye wastewater and artistic coating wastewater drained in the dye synthesis or dyeing and finishing process. The efficient dye flocculant has the advantages of being high in trapping capability and settling speed, capable of treating complexing heavy metal ions, trapping dye molecules and complexing heavy metal ions in a few seconds and growing into large settling particles rapidly to achieve the purpose of rapid dye separation, simple to operate, low in treatment cost, high in adaptability 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 high-efficiency dye flocculant and its preparation method and application. It is mainly used in dye wastewater and art paint wastewater discharged during dye synthesis or dyeing and finishing processes. application, to achieve simultaneous removal of cationic dye molecules, 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 process. With the rapid dev...

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.