Preparation method of targeted catalyst for treating wastewater containing aromatic compounds

Abstract

Provided is a preparation method of a targeted catalyst for treating wastewater containing aromatic compounds. The method comprises the following steps that a solution containing 5%-15% of active component salt is dissolved in deionized water of 40 DEG C to 80 DEG C; an ammonium salt is added to enable the pH to be increased to be 6.5 to 7.5, the temperature is kept, and stirring is conducted for 40 min to 80 min at the speed of 60 r / min to 100 r / min; filtering is conducted, precipitates are washed 3-5 times with deionized water and dried for 3 h to 6 h in a muffle furnace of 100 DEG C to 110 DEG C, and granular powder is obtained; 10%-30% by mass of granular powder, 1%-5% by mass of lubricating agent, 4%-15% by mass of gelatinizing agent, 50%-80% by mass of alumina powder and 1%-3% by mass of pore-expanding agent are mixed and stirred to be uniform and then rolled to be 2 mm to 8 mm; an obtained product is dried for 3 h to 5 h in a drying oven of 100 DEG C to 200 DEG C; the dried product is roasted for 2 h to 6 h in the muffle furnace of 400 DEG C to 800 DEG C. The targeted catalyst is obtained through a mixed mode of precipitating and melting, larger channels can be formed in the catalyst, a larger specific surface area can be obtained, and therefore organic matter in the wastewater fully makes contact with active metal oxide in the catalyst, and the degradation effect on the organic matter is improved.

Description

technical field [0001] The invention relates to the fields of wastewater treatment and catalyst preparation, in particular to a method for treating wastewater characterized by aromatic compounds. More specifically, it relates to a preparation method for targeting catalysts mainly composed of such compounds. Background technique [0002] Aromatic compounds refer to compounds with a benzene ring structure, mainly including aromatic hydrocarbons and their derivatives, such as halogenated aromatic hydrocarbons, aromatic nitro compounds, etc. With the development of petroleum and petrochemical, light industry papermaking, textile printing and other industrial fields, aromatic compounds are often used as solvents and raw materials in the industrial production process, and a large amount of organic matter will enter the environment with the discharge of industrial wastewater and waste. This type of organic wastewater usually contains a wide variety of pollutants, high toxicity, hi...

AI Technical Summary

Problems solved by technology

However, due to the great differences in the content and types of organic matter in wastewater, this technology also has certain limitations: (1) the decomposition of refractory pollutants in wastewater is not thorough enough, and it is difficult to achieve a high COD removal effect; (2) ozone The utilization rate is low, and the hydroxyl radicals produced by decomposition are limited; (3) no targeted catalysts have been developed for the main organic substances in different wastewaters, and the specificity is not strong and the removal rate is not high

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