Preparation method of iron-manganese active granules for dye wastewater treatment

Abstract

The invention discloses a preparation method of iron-manganese active granules for dye wastewater treatment. The preparation method comprises the following steps: 1, uniformly mixing granular activated carbon and powdered activated carbon according to a preset mass ratio, and putting the mixture into a container for deliming and activating treatment; 2, adding an adhesive into the activated carbon subjected to the deliming and activating treatment, and stirring and mixing the components to prepare spherical granules with a preset granule size; 3, soaking the spherical activated carbon granules in the iron-manganese precursor solution, and dropwise adding a mixed solution of sodium hydroxide and sodium acetate into the mixed solution to prepare an iron-manganese-loaded active granule precursor; 4, washing the iron-manganese-loaded active granule precursor with purified water until the pH value is neutral, dropwise adding a sodium hydroxide solution until the pH value is alkalescent, and aging the precursor in a water bath; and 5, washing the aged iron-manganese-loaded active granules with purified water until the pH value is constant, and roasting the granules in a muffle furnace. The catalyst activity and stability are improved, the inactivation risk is reduced, the overall catalytic performance of the material is improved, and the material preparation and replacement cost is reduced.

Description

technical field [0001] The invention relates to a preparation method of iron-manganese active particles for dye wastewater treatment, which belongs to the field of chemical industry. Background technique [0002] At present, nearly 10,000 kinds of synthetic dyes have been widely used in the production process of textile, printing, pharmaceutical, food and cosmetic processing in the world. With the rapid development of the textile industry, the problem of organic pollution caused by dye wastewater has become increasingly prominent. The generation of wastewater is mainly composed of four parts: desizing, scouring, bleaching and dyeing. Among them, the dyeing process, as the most critical process in the printing and dyeing industry, produces a large amount of printing and dyeing wastewater with deep chroma, high COD concentration and complex chemical composition. The dyes in printing and dyeing wastewater are often biologically toxic and chemically stable, damaging the natura...

AI Technical Summary

Problems solved by technology

The dyes in printing and dyeing wastewater are often biologically toxic and chemically stable, destroying the natural environment, and causing harm to animals and plants. At the same time, the accumulation in the human body can easily lead to deformities, cancer, and gene mutations, which pose a threat to human health.

[0003] Ozone activated carbon catalytic process is currently widely used in the treatment of dye wastewater, but traditional catalytic materials have disadvantages such as low specific surface area, easy deactivation, narrow pH range, and poor stability.

Frequent replacement of catalysts will increase operating costs, and pH adjustment during water treatment will generate a large amount of sludge

Images