Dyeing waste water treating agent and preparation method thereof

Abstract

The invention provides a preparation method of a dyeing waste water treating agent, comprising the following steps: (1) mixing bentonite, corn starch and wheat starch uniformly, adding water and extruding into particles 1-2mm in diameter; (2) calcining the particles obtained in step (1) for 5-7h, cooling to room temperature; (3) mixing the calcined particles with an acrylamide solution and stirring; (4) adding an initiator into the mixture system to initiate polyreaction, then adding a cross-linking agent to initiate cross linking reaction to obtain a mixture; and (5) baking the mixture in step (4) to obtain the dyeing waste water treating agent. The dyeing waste water treating agent provided by the invention fully utilizes the expandability and absorbability of the bentonite, has strong absorption on chroma, phosphorus, heavy metal ions, organic matters and the like, and can be used as a purifying agent in waste water treatment.

Description

technical field [0001] The invention belongs to the technical field of printing and dyeing, and in particular relates to a printing and dyeing wastewater treatment agent and a preparation method thereof. Background technique [0002] Although dyes do not have strong acute toxic effects like pesticides, people have found mutagenic and carcinogenic species in azo dyes, anthraquinone dyes, and triphenylmethane dyes, and the degradation products of dyes are mostly linked. Some carcinogenic aromatic compounds such as aniline. As a class of organic compounds with stable structure, dyes have the characteristics of anti-acid, anti-alkali, anti-light, anti-microbial, etc., and have a long residence period in the environment. Very low concentrations of dyes in water will also affect the quality of receiving water. In normal function, it is also toxic to aquatic microorganisms and fish, reducing the diversity of the entire aquatic ecosystem. Therefore, the negative effect of dyes on ...

AI Technical Summary

Problems solved by technology

Most printing and dyeing factories still use activated carbon adsorption for decolorization, but activated carbon is selective to dyes, the price is high, and regeneration is difficult. The application in the adsorption and decolorization of printing and dyeing wastewater is limited. Generally, it is only used in the treatment or advanced treatment of printing and dyeing wastewater with low concentration.