Modified activated carbon slurry for removing ammonia nitrogen and manganese ions in water, preparation method and application thereof

Abstract

The invention discloses modified activated carbon slurry for removing ammonia nitrogen and manganese ions in water, a preparation method and application thereof. The method comprises the following steps: dispersing activated carbon with a particle size larger than 0.1 mm and a modification aid in water, and grinding the activated carbon into particles with a particle size smaller than 10 microns through wet grinding to obtain the modified activated carbon slurry, wherein the total mass of the activated carbon and the modification aid is 5-50 mg per milliliter of water, the mass ratio of the activated carbon to the modification aid is 1: (0.01-2), and the modification aid comprises the following components in percentage by mass: 30-70% of hydrogen peroxide, 5-15% of a copper salt, 10-20% of ferrite, 10-20% of a manganese salt and 5-15% of carbonate. According to the invention, an organic endoperoxide structure is formed on the surface and in pores of activated carbon in situ by using a modification aid and is covered with a layer of active iron-manganese-copper oxide, and the organic endoperoxide structure on the interface of the activated carbon can effectively oxidize ammonia nitrogen and manganese ions adsorbed on the activated carbon under the catalytic action of the iron-manganese-copper oxide layer and the electron transfer action of the activated carbon, so that the adsorption-oxidation efficient removal of the ammonia nitrogen and manganese ions is realized.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, and more particularly relates to a modified activated carbon slurry for removing ammonia nitrogen and manganese ions in water, a preparation method and application thereof. Background technique [0002] Ammonia nitrogen and manganese ions are common pollutants in drinking water. Among them, ammonia nitrogen is a nutrient in the water body, which can lead to eutrophication of the water body, causing the water body to be black and smelly. It is the main oxygen-consuming pollutant in the water, and even has toxic effects on fish and some aquatic organisms. Ammonia nitrogen in water mainly comes from chemical fertilizers, coking, petrochemicals, pharmaceuticals, food, landfills, etc. With the rapid economic development, ammonia nitrogen has become one of the important factors of water pollution. Manganese is a mineral element with a relatively high content in groundwater. Although they...

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Problems solved by technology

[0004] The primary purpose of the present invention is to overcome the poor adsorption efficiency of existing activated carbon materials to ammonia nitrogen and manganese ions, which cannot effectively remove ammonia nitrogen and manganese ions in water, and provide a preparation of modified activated carbon slurry for removing ammonia nitrogen and manganese ions in water method

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