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Multiphase Fenton catalyst as well as preparation method and application thereof

A catalyst, Fenton's technology, applied in the field of heterogeneous Fenton-like catalyst and its preparation and application, can solve the problems of poor mechanical strength, large amount of dissolved ions, etc., to reduce the dosage, reduce chemical sludge, and promote decomposition. and the effect of COD removal

Active Publication Date: 2014-07-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problems of poor mechanical strength and large amount of leached ions in existing heterogeneous Fenton-like catalysts, and provides a multi-phase Fenton-like catalyst and its preparation method and application

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  • Multiphase Fenton catalyst as well as preparation method and application thereof
  • Multiphase Fenton catalyst as well as preparation method and application thereof
  • Multiphase Fenton catalyst as well as preparation method and application thereof

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specific Embodiment approach 1

[0017] Specific embodiment 1: A heterogeneous Fenton-like catalyst of the present embodiment is made of reduced iron powder, activated carbon powder, electrolytic copper powder, silicate and starch; wherein electrolytic copper powder accounts for the total 5% to 10% of the total mass, silicate accounts for 2% to 8% of the total mass, 4% to 8% of the total starch, the sum of reduced iron powder and activated carbon powder accounts for 74 to 89% of the total mass, reduced iron The mass ratio of activated carbon powder to activated carbon powder is (1.5-5):1.

specific Embodiment approach 2

[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that the particle size of the reduced iron powder is 180-220 mesh. Others are the same as the first embodiment.

specific Embodiment approach 3

[0019] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that the particle size of the electrolytic copper powder is 180-220 mesh. Others are the same as those in Embodiment 1 or 2.

[0020] Embodiment 3: This embodiment differs from Embodiments 1 to 3 in that the silicate is a pore-forming agent, and the silicate is sodium metasilicate nonahydrate or sodium metasilicate pentahydrate. Others are the same as one of the specific embodiments 1 to 3.

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Abstract

The invention relates to a multiphase Fenton catalyst as well as a preparation method and application thereof and mainly solves the technical problems of poor mechanical strength and high ion solubility of an existing multiphase Fenton catalyst. The multiphase Fenton catalyst is prepared from reduced iron powder, active carbon powder, electrolytic copper powder and silicate. The preparation method comprises the following steps: (1) weighing the reduced iron powder, the active carbon powder, the electrolytic copper powder and the silicate; (2) firstly mixing the active carbon powder and the electrolytic copper powder to be uniform, then adding a silicate solution, mixing to be uniform, adding the active carbon powder, and mixing to be uniform so as to obtain mixed powder; (3) adding a starch solution serving as a binding agent into the mixed powder to prepare granules and drying; (4) sintering in nitrogen atmosphere, so as to obtain the multiphase Fenton catalyst. The multiphase Fenton catalyst prepared by utilizing the preparation method can be used as a sewage treatment catalyst.

Description

technical field [0001] The invention relates to a Fenton-like catalyst, a preparation method and application thereof. Background technique [0002] A typical Fenton reagent is Fe 2+ with H 2 o 2 The combination of hydroxyl radicals (HO ) produced in the Fenton system under acidic conditions has a high oxidation activity, so it can effectively decompose organic matter that cannot be decomposed by conventional methods, and can react with pollutants in wastewater without selection . Catalysts in the Fenton system are mainly divided into homogeneous and heterogeneous catalysts. Homogeneous catalysts have the advantages of rapid reaction, no mass transfer resistance, and milder reaction conditions, but at the same time, they have a narrow applicable pH range and are difficult to recycle. , produce a large amount of difficult to handle chemical sludge and other problems. The heterogeneous catalyst has the advantages of simple separation from wastewater, greatly simplified tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72
Inventor 邱珊丁晓马放邓凤霞徐善文韩帅
Owner HARBIN INST OF TECH
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