Preparation method for modified bentonite for decoloring waste water of reactive brilliant red dye

Abstract

The invention relates to a preparation method for modified bentonite, belongs to the field of treatment methods for the waste water of dye, and particularly provides a decoloring treatment method. The preparation method for the modified bentonite for decoloring the waste water of the reactive brilliant red dye comprises the following steps: taking dried, crushed and screened bentonite, putting the dried, crushed and screened bentonite into a container with a plug, successively adding inorganic modifiers and organic modifiers, stirring the mixture of the bentonite, the inorganic modifiers and the organic modifiers for 2 hours at the constant temperature of 60 DEG C, filtering products, repeatedly cleaning the filtered products with distilled water, sucking and filtering the cleaned products, baking the filtered products, keeping the baked products at the constant temperature of 110 DEG C for one hour, and grinding and screening the dried and activated products to obtain the modified bentonite. The preparation method disclosed by the invention has the characteristics of simple technology, strong maneuverability, low cost and the like, and the preparation method is suitable for industrialized production. Through determination, the decoloring rate of the prepared modified bentonite for the waste water of the reactive brilliant red dye is 91.8-93.2% which is slightly higher than the decoloring rate 85-90% of activated carbon, but the use cost of the modified bentonite is below one third of that of the activated carbon.

Description

technical field [0001] The invention relates to a preparation method of modified bentonite, which belongs to the field of dye wastewater treatment, especially the decolorization treatment method. Background technique [0002] As people pay more and more attention to environmental protection issues, the decolorization of printing and dyeing wastewater and the removal of organic pollutants are receiving more and more attention. It is difficult to carry out conventional treatment. At present, most printing and dyeing factories use activated carbon adsorption, but due to the high price of activated carbon, the application of adsorption and decolorization of printing and dyeing wastewater is limited. The natural mineral montmorillonite is not only rich in mineral reserves, but also cheap (even if the montmorillonite is only 200 yuan per ton after grinding through 200 mesh), it also has good adsorption properties and has attracted attention both at home and abroad. [0003] Bento...

AI Technical Summary

Problems solved by technology

[0003] Bentonite is a kind of clay with montmorillonite as the main component. It has a layered structure of 2:1 type. Due to the electronegativity generated by lattice replacement between layers, it has better adsorption performance for cationic organic substances. The modified bentonite has better adsorption performance. At present, there are many reports about its organic quaternary ammonium salt, but the cost of organic quaternary ammonium salt is high, resulting in high cost of use of bentonite modified by organic quaternary ammonium salt. Adsorption in printing and dyeing wastewater Depigmentation applications are limited