Method for processing high-concentration refractory organic wastewater by using mixed rare earth-brass-iron-carbon catalytic oxidation method

A technology of mixing rare earth and organic wastewater, applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of high price of single rare earth compound, addition effect, difficult separation of rare earth elements, etc., to improve treatment efficiency and reaction speed, and high production efficiency , the effect of simple preparation method

Inactive Publication Date: 2013-04-24
DONGHUA UNIV
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Problems solved by technology

Taking cerium oxide as the research object is reasonable in theoretical analysis, but in practice, due to the difficulty in separating rare earth elements, the price of a single rare earth compound is high, and various elements in the mixture also have catalytic ability, and the mixture may also have additive effects

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  • Method for processing high-concentration refractory organic wastewater by using mixed rare earth-brass-iron-carbon catalytic oxidation method

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Effect test

Embodiment 1

[0029] Precipitate the rare earth ore without radioactive substances through carbonate and oxalic acid to obtain waste residue, mix 1 part of waste residue with 10% hydrochloric acid with a mass fraction of 1 part by weight, stir thoroughly and activate for 6 hours to obtain hydrochloric acid treated Waste residue, store for later use; waste residue contains mixed rare earth oxides 8%-25%;

[0030] Rare earth-copper-iron mixed catalyst configuration: mix pig iron scraps with a particle size of 2mm, brass scraps with a particle size of 5mm and waste residue after hydrochloric acid treatment and mix well, and activate them at 20°C for 1 hour to obtain rare earth -Copper-iron mixed catalyst, ready for use, ready for immediate use; the ratio of pig iron filings, brass filings and mixed rare earth oxides is 100 kg: 0.1-1 kg: 30 g.

[0031] Preparation of catalytic oxidation reaction balls: Stir and mix coke with a particle size of 1 cm and a rare earth-copper-iron mixed catalyst at...

Embodiment 2

[0035] Precipitate the rare earth ores without radioactive substances through carbonate and oxalic acid to obtain waste residues, mix 1 part of waste residues with 4 parts by weight of hydrochloric acid with a mass fraction of 40%, fully stir and activate for 12 hours to obtain hydrochloric acid treated Waste residue, store for later use; waste residue contains mixed rare earth oxides 8%-25%;

[0036] Rare earth-copper-iron mixed catalyst configuration: Mix pig iron chips with a particle size of 20 mm, brass chips with a particle size of 15 mm and waste residue after hydrochloric acid treatment and mix well, and activate at 100 ° C for 6 hours to obtain rare earth - Copper-iron mixed catalyst, ready for use, ready for immediate use; the ratio of pig iron scrap, brass scrap and mixed rare earth oxide is 100 kg: 0.1-1 kg: 30-150 g.

[0037] Catalytic oxidation reaction bag preparation: Stir and mix coke with a particle size of 10 cm and a rare earth-copper-iron mixed catalyst at...

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Abstract

The invention relates to a method for processing high-concentration refractory organic wastewater by using a mixed rare earth-brass-iron-carbon catalytic oxidation method. The method comprises the steps that: rare earth ores are precipitated by using carbonate and oxalic acid, such that waste slag is obtained; the waste slag is activated for 6-12h by using hydrochloric acid, and is mixed with raw iron chips and brass chips; activation is carried out for 1-6h under a temperature of 20-100 DEG C; the product is mixed with coke, and the mixture is packaged into a reaction ball or bag, such that a mixed rare earth-brass-iron-carbon catalytic oxidant is obtained; wastewater is directly delivered into the reaction ball or bag, and is subjected to an aeration reaction for 0.5-2.5h; after the reaction is finished, polymeric alumina PAC is added for coagulation sedimentation. The method provided by the invention is suitable to be used in processing of high-concentration refractory organic wastewater with a pH value of 3-13. With the method, acid or alkali regulations are not needed, a reaction speed is high, and processing effect is good. The method provided by the invention is simple, and has the advantages of low cost, high production efficiency, environment friendliness, and suitability for industrialized application.

Description

technical field [0001] The invention belongs to the field of high-concentration refractory organic wastewater treatment, in particular to a mixed rare earth-copper-iron-carbon catalytic oxidation method for treating high-concentration refractory organic wastewater. Background technique [0002] Wet catalytic oxidation treatment of high-concentration refractory organic wastewater is an effective method, which is mainly used in the wastewater treatment of printing and dyeing, chemical, food, pharmaceutical and other industries. Commonly used catalysts include noble metals and non-precious metals. The former is typically platinum, silver, rhodium, ruthenium, etc.; copper, iron, etc. are commonly used as non-noble metal catalysts. The sources of precious metals are few and expensive, and they are only suitable for occasions with special requirements. [0003] The iron-carbon method is the most commonly used organic wastewater treatment method. In fact, the micro-electrolysis met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
Inventor 奚旦立冀世峰马春燕徐淑红
Owner DONGHUA UNIV
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