Method for Synthesizing Fe-Carbon Internal Electrolytic Filler by In-Situ Carbothermal Reduction

Abstract

The invention relates to the field of electrolytic packing preparation, and provides a method for synthesizing electrolytic packing in iron carbon through in-situ carbothermic reduction. The method comprises the following steps of oxidization modification, wherein coal pitch is dispersed into a Fenton reagent, the mass ratio of the coal pitch to the Fenton reagent is 1:(5-100), after a hydrothermal reaction is performed for 3-12 h at the temperature of 150 DEG C-250 DEG C, an active regulator is added, the hydrothermal reaction is continuously performed for 3-10 h at the temperature of 150 DEG C-200 DEG C, centrifugal separation is performed, and drying is performed for 4-6 h at the temperature of 120 DEG C-150 DEG C; in-situ reduction, wherein the obtained modified matter is roasted for 2-8 h at the temperature of 500 DEG C-1200 DEG C. The method is low in cost and simple in preparation process, and the prepared iron carbon packing is developed in pore structure and high in metal active component dispersity and wastewater treatment capacity.

Description

technical field [0001] The invention relates to the field of preparation of electrolytic fillers, in particular to a method for synthesizing electrolytic fillers in iron-carbon by in-situ carbothermal reduction. Background technique [0002] Iron-carbon micro-electrolysis reaction technology is currently an ideal process for treating refractory organic wastewater. It mainly uses regular high-efficiency electrochemical catalyzed iron-carbon inner electrolytic fillers to electrolyze organic matter in organic wastewater to achieve the degradation of organic pollutants. Purpose. At present, it has been disclosed that iron-carbon internal electrolytic fillers mostly use iron simple substance and carbon material as active components, and are prepared by methods such as bonding and sintering. Chinese patent CN101423313B "Treatment process of fluorescent whitening agent production wastewater" discloses that iron-carbon fillers with mechanically mixed iron filings and activated carb...

AI Technical Summary

Problems solved by technology

Chinese patent CN101423313B "Treatment process of fluorescent whitening agent production wastewater" discloses that iron-carbon fillers with mechanically mixed iron filings and activated carbon as active components are used for the treatment of organic wastewater. It is difficult for iron-carbon species in the filler to form uniform micro In the electrolytic cell, the iron-carbon material flow loss is large during continuous wastewater treatment, which is easy to harden, which is not conducive to the large-scale treatment and application of industrial wastewater, and the COD removal rate after iron-carbon reduction treatment is 40-50%

Chinese patent CN100540477C "A high-carbon metallized pellet for treating wastewater and its preparation method" discloses a high-carbon-content iron-carbon material preparation technology, and the prepared pellets are easy to fluidize and have good adsorption capacity for pollutants. Strong, but its COD removal rate is 50%, and a large amount of binder added in it will affect the working efficiency of the iron-carbon primary battery, form more sludge, and cause compaction

Chinese patent CN100566803C "a method for dispersing nano-iron particles" discloses an aqueous solution of nano-iron and activated carbon composition prepared by dispersing ultrafine nano-iron powder and activated carbon through a high-energy mill. The dispersion effect is stable and the penetration ability is strong, but the cost is high , nano-iron powder is easily deactivated in practical applications, and is not suitable for industrial wastewater treatment practice