Preparation method of iron-carbon catalyst for Fenton wastewater treatment

Abstract

The invention discloses a preparation method of an iron-carbon catalyst for Fenton wastewater treatment. The iron-carbon catalyst is prepared from 55-70 wt% of iron oxide powder, 10-15 wt% of fly ash,2-5 wt% of clay, 3-5 wt% of Pingxiang Changfeng porcelain clay powder, 3-5 wt% of natural manganese sands, 10-20 wt% of zinc oxide waste residue powder and 0.3-1 wt% of potassium ferrate through thesteps of ball milling, granulation, drying and high-temperature sintering. Compared with catalysts in the prior art, the iron-carbon microelectrolysis catalyst in the invention has the advantages of good treatment effect, low production cost, convenience in operation and maintenance, wide application range, low power and resource consumption, fast speed and stable effect in a treatment reaction, no secondary pollution, improvement of the biodegradability of wastewater, and facilitation of the sedimentation and biofilm colonization of sludge; and the preparation method can improve the strength,the specific surface area and the porosity of the catalyst and improve the treatment effect and the service life of the catalyst in order to facilitate backwashing.

Description

technical field [0001] The invention relates to the technical field of chemistry, in particular to a method for preparing an iron-carbon catalyst used in Fenton process wastewater treatment from industrial waste materials. Background technique [0002] Micro-electrolysis technology is a method of using iron-carbon as anode and cathode to form a micro-electrolysis cell in wastewater to treat wastewater. It has the characteristics of low cost, simple process and obvious treatment effect. It is widely used in the treatment of printing and dyeing, pharmaceutical It is an effective method for high concentration, high color and refractory biodegradable organic wastewater in industries such as pesticides, coking and electroplating. However, there is also a problem with the micro-electrolysis technology: after the micro-electrolysis material is used for a period of time, the iron powder in the micro-electrolysis material is easy to rust and bond with the carbon, resulting in channel...

AI Technical Summary

Problems solved by technology

However, there is also a problem with the micro-electrolysis technology: after the micro-electrolysis material has been used for a period of time, the iron powder in the micro-electrolysis material is prone to rust and harden with carbon, resulting in channeling of the sewage and affecting the quality of the effluent, requiring frequent backwashing Or replace the micro-electrolysis material, otherwise it will reduce the efficiency of wastewater treatment and increase the cost of treatment

However, the Fenton method not only requires high feed weight ratio, sequence, time, and wastewater pH, but also requires complex process control, and has high requirements for hydrogen peroxide production equipment and high treatment costs. Therefore, in general, most organic wastewater is treated with iron-carbon micro Electrolytic catalysts are used for treatment. In special cases, organic wastewater is first treated with iron-carbon micro-electrolytic catalysts, and then advanced treatment with Fenton’s trial production