Micro-electrolysis filler and preparation method thereof

Abstract

The invention discloses a micro-electrolytic filler and a preparation method thereof. The micro-electrolytic filler includes iron powder, iron filings, purple sand, borax, bentonite, activated carbon powder, sodium hydroxide, zeolite, corn starch, sodium carboxymethyl cellulose, each The composition content is as follows (wt%): iron powder: 60‑70; iron filings: 15‑20; purple sand: 2‑3; borax: 2‑3; bentonite: 5‑8; activated carbon powder: 6‑8; : 0.2‑1; Zeolite: 0.1‑0.5; Corn starch: 0.2‑0.5; Sodium carboxymethylcellulose: 0.1‑0.8. The preparation method includes raw material screening; raw material mixing; pressing film forming; drying and sintering. Compared with the prior art, the invention has the characteristics of high micro-electrolysis efficiency, no hardening, low cost, long service life and good filtering and purification effect.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a micro-electrolytic filler and a preparation method thereof. Background technique [0002] The iron-carbon micro-electrolysis technology mainly utilizes the combined action of the reduction of iron, the electrochemical properties of iron, and the flocculation and adsorption of iron ions to purify wastewater. [0003] The electrolytic materials of the iron-carbon micro-electrolysis process generally use cast iron scraps and activated carbon or coke. When the materials are immersed in wastewater, electrolytic reactions occur both internally and externally. On the one hand, cast iron contains a small amount of iron carbide, and there is an obvious redox potential difference between iron carbide and pure iron, so many tiny primary batteries are formed inside the cast iron filings, pure iron is used as the anode of the primary battery, and iron carbide is used as t...

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Problems solved by technology

[0013] Micro-electrolysis technology has carried out a large number of experimental studies on printing and dyeing wastewater, papermaking wastewater, coking wastewater, explosives wastewater, pharmaceutical wastewater, oily wastewater, landfill leachate, high-salinity wastewater, etc. Micro-electrolysis technology has a certain degree of COD removal , while greatly improving the biodegradability of wastewater, especially for acidic wastewater, the PH value is greatly increased, and the cost of neutralizing agents is also greatly saved. Therefore, at present, the application prospect of micro-electrolysis technology is broad, but there are existing The following problems: After long-term operation, organic matter will be deposited on the iron electrode, forming a passivation film, which hinders the formation of a stable primary battery between iron and carbon; iron-carbon fillers are prone to hardening, which hinders the effective contact between wastewater and fillers, forming Short flow, thus reducing the treatment effect of wastewater; the reaction of iron and carbon electrodes needs to be carried out under acidic conditions to achieve better results. If the pH value of the influent fluctuates greatly, the acid and alkali added to adjust the pH value will be greatly increased Increased cost of wastewater treatment

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