Preparation method of Fenton-like composite material with dual functions of removing NH4<+>-N and CODMn

Abstract

The invention belongs to the technical fields of environmental functional materials, waste resource utilization, sewage (wastewater) treatment and the like, and discloses a preparation method of a Fenton-like composite material with dual functions of removing NH4<+>-N and CODMn, which particularly comprises the following steps: taking fly ash, sludge of a sewage treatment plant, oyster shells andother wastes, a small amount of mineral materials, a proper amount of additives and the like as raw materials, uniformly mixing the raw materials by using a proper amount of Fe<2+> solution, pelletizing, calcining, molding, and naturally cooling to obtain the novel Fenton-like composite material. The material treats waste with waste, is low in cost, stable in structure, large in specific surface area, free of secondary pollution and simple in preparation and use process, has adsorption, decoloration and advanced oxidation effects, has a good adsorption removal effect on pollutants such as NH4<+>-N and CODMn in sewage and wastewater, is easy for solid-liquid separation and recycling after being used, is a good Fenton-like catalytic material and an environment treatment material, and has great application and popularization values.

Description

technical field [0001] The invention belongs to the technical and application fields of environmental functional materials, waste resource utilization and sewage (waste) water treatment, and specifically relates to a 4 + -N and COD Mn Preparation method of dual-functional Fenton-like composites. Background technique [0002] Fenton's method is to use H 2 o 2 and Fe 2+ or Fe 3+ The chain reaction between them catalyzes the formation of strong oxidizing OH free radicals, which can oxidize and degrade most organic pollutants. The Fenton-like technology is a derivative of the Fenton technology. Compared with the traditional Fenton reaction, the Fenton-like technology reduces the operating cost of the traditional Fenton reaction and expands the application field of the traditional Fenton reaction, but it has high processing costs, narrow pH range, and polluted after treatment (waste ) Problems such as water color reversion and single function limit its use place and treat...

AI Technical Summary

Problems solved by technology

The preparation method of the Fenton catalyst is complex and cumbersome. It has undergone repeated processes such as mixing and stirring, suction filtration, constant temperature drying, and long-term (6-11h) calcination. It also uses a large amount of strong acid, strong alkali solution and rare inert gas. There is secondary chemical pollution, and the economic cost is high, which is not conducive to wide application in industry

[0018] So far, Fenton technology research has developed from a single homogeneous Fenton to a heterogeneous Fenton, which forms a metal oxide form by solidifying metal ions, which overcomes to a certain extent that the traditional Fenton must be carried out in an acidic pH range and produces more Iron mud, hydrogen peroxide H 2 o 2 A series of problems such as low utilization rate and difficult solid-liquid separation, especially the defect that it cannot play a catalytic role at a pH value close to neutral, increases the processing cost of adjusting the pH value of wastewater and its subsequent processes. These bottlenecks are currently still not resolved

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