Catalyst for alkaline hydrolysis of pyraclostrobin production wastewater, preparation method of catalyst and pretreatment method of pyraclostrobin production wastewater

Abstract

The invention discloses a catalyst for alkaline hydrolysis of pyraclostrobin production wastewater, a preparation method of the catalyst and a pretreatment method of the pyraclostrobin production wastewater. The catalyst is obtained by curing modified biomass charcoal, an iron-based metal catalyst and sodium alginate which serve as raw materials under the crosslinking action of a crosslinking agent. The catalyst is used for pretreating pyraclostrobin production wastewater. The catalyst disclosed by the invention has the advantages of low cost, large specific surface area, large number of active sites, good dispersity, good stability, good catalytic performance and the like; the problems of poor activity, poor dispersion effect and the like in the existing iron-based metal catalyst are solved; the disclosed catalyst can achieve favorable treatment effect and enhance the biodegradability of the wastewater when being used for treating pyraclostrobin production wastewater, and has the advantages of high use value and favorable application prospects. The preparation method of the catalyst has the advantages of simple preparation process, mild preparation conditions, low cost, no secondary pollution and the like, is suitable for large-scale preparation, and is beneficial to industrial application.

Description

technical field [0001] The invention belongs to the technical field of pesticide heterocyclic wastewater treatment, and relates to a catalyst for alkaline hydrolysis of pyraclostrobin production wastewater, a preparation method thereof, and a pretreatment method for pyraclostrobin production wastewater. Background technique [0002] Pyraclostrobin is a new type of agricultural fungicide developed by BASF in 1993 and has a pyrazole structure. The drug has a broad-spectrum fungicidal activity, applicable to soybeans, grains, corn, grapes and fruits and vegetables, and can control plants caused by almost all types of fungal pathogens such as Ascomycetes, Basidiomycetes, Deuteromycetes and Oomycetes. It has the advantages of low toxicity, safety to non-target organisms, safety and friendliness to users and the environment. [0003] The synthetic steps of pyraclostrobin are many, and the waste water production process is many, the waste water components are complex, some compone...

AI Technical Summary

Problems solved by technology

However, the above-mentioned process has the following disadvantages: the biological method can only treat low-concentration wastewater; Fenton oxidation technology needs to add hydrogen peroxide reagent, which will generate a large amount of waste residue and cause secondary pollution

Although the treatment effect can be improved after adding the catalyst, the catalysts used still have the following problems: most of the catalysts are noble metals, and the treatment cost is high; the activity is poor; the dispersion effect is not good; the recovery is difficult

The existence of these defects not only cannot effectively improve the pretreatment effect of pyraclostrobin production wastewater, but also causes secondary pollution to the environment.