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Heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater and preparation method thereof

A technology for industrial wastewater and catalysts, applied in catalyst activation/preparation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Strong pollution characteristics, low preparation cost, no secondary pollution effect

Active Publication Date: 2020-05-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention provides a heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater and a preparation method thereof in order to solve the technical problems that the existing catalysts are not suitable for acidic wastewater and the treatment efficiency is low

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  • Heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater and preparation method thereof

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specific Embodiment approach 1

[0035] Embodiment 1: A heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater in this embodiment consists of a cordierite honeycomb ceramic carrier and γ-Al loaded on the surface of the cordierite honeycomb ceramic carrier 2 o 3 and the active component Pd-CeOx composition, the γ-Al 2 o 3 The mass of Pd is 20% of the mass of cordierite honeycomb ceramics, the mass percentage of Pd in ​​the heterogeneous ozone catalyst is 2%, and the ratio of Pd to Ce in the active component is 1:3.

[0036] The method for preparing the above-mentioned heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater is carried out as follows:

[0037] 1. Preparation of γ-Al 2 o 3 Sol: Add pseudo-boehmite powder into deionized water for beating for 20 minutes to form a suspension of pseudo-boehmite powder with a mass fraction of 35%, and then add nitric acid peptizer with a concentration of 3mol / L dropwise to the suspension. Reflux and degel for...

specific Embodiment approach 2

[0041] Specific embodiment two: A heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater in this embodiment consists of a cordierite honeycomb ceramic carrier and gamma-Al loaded on the surface of the cordierite honeycomb ceramic carrier 2 o 3 and the active component Pd-CeOx composition, the γ-Al 2 o 3 The mass of Pd is 20% of the mass of cordierite honeycomb ceramics, the mass percentage of Pd in ​​the heterogeneous ozone catalyst is 3%, and the ratio of Pd to Ce in the active component is 1:3.

[0042] The method for preparing the above-mentioned heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater is carried out as follows:

[0043] 1. Preparation of γ-Al 2 o 3 Sol: Add pseudo-boehmite powder into deionized water for beating for 20 minutes to form a suspension of pseudo-boehmite powder with a mass fraction of 35%, and then add nitric acid peptizer with a concentration of 3mol / L dropwise to the suspension. Reflu...

specific Embodiment approach 3

[0047] Specific embodiment three: A heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater in this embodiment consists of a cordierite honeycomb ceramic carrier and gamma-Al loaded on the surface of the cordierite honeycomb ceramic carrier 2 o 3 and the active component Pd-CeOx composition, the γ-Al 2 o 3 The mass of Pd is 20% of the mass of cordierite honeycomb ceramics, the mass percentage of Pd in ​​the heterogeneous ozone catalyst is 4%, and the ratio of Pd to Ce in the active component is 1:3.

[0048] The method for preparing the above-mentioned heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater is carried out as follows:

[0049] 1. Preparation of γ-Al 2 o 3 Sol: Add pseudo-boehmite powder into deionized water for beating for 20 minutes to form a suspension of pseudo-boehmite powder with a mass fraction of 35%, and then add nitric acid peptizer with a concentration of 3mol / L dropwise to the suspension. Ref...

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Abstract

The invention discloses a heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater and a preparation method thereof, belonging to the field of wastewater treatment. The invention aims to overcome the technical problem that an existing catalyst is not suitable for acid wastewater and is low in treatment efficiency. The heterogeneous ozone catalyst is composed of a cordierite honeycomb ceramic carrier, gamma-Al2O3 and an active component Pd-CeOx, wherein the gamma-Al2O3 and the active component Pd-CeOx are loaded on the surface of the cordierite honeycomb ceramic carrier. The method comprises the following steps: sequentially putting cordierite honeycomb ceramic into gamma-Al2O3 sol, CeOx sol and a lead nitrate solution for dipping, and then carrying out drying androasting to obtain the heterogeneous ozone catalyst. The catalyst provided by the invention is used for effluent treatment of high-COD acidic organic wastewater. Compared with an existing catalyst, the catalyst provided by the inventioin has the following advantages: COD removal efficiency is improved by nearly 15%, the COD content level of effluent is more stable, preparation cost is low, secondary pollution is avoided, and the problem that high-concentration and high-organic wastewater is difficult to treat in the industries of printing and dyeing, pesticides, pharmacy, papermaking, chemicalengineering and the like is solved. In addition, the ozone catalyst is easy to prepare, high in catalytic efficiency, not prone to falling off and capable of being repeatedly used.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, in particular to a heterogeneous ozone catalyst for efficiently treating acidic industrial wastewater and a preparation method thereof. Background technique [0002] High COD acidic organic wastewater mainly comes from industries such as pesticides, pharmaceuticals, and chemical fibers. It usually has the characteristics of high acidity, high concentration of organic matter, and high salt content, making it difficult to treat. After biochemical reaction treatment, the organic matter and organic matter fragments remaining in the effluent are difficult to be degraded and removed by ordinary biochemical methods. In order to achieve the standard discharge of the final effluent of the sewage plant, advanced treatment of the biochemical effluent is required. [0003] Advanced Oxidation Technology Mineralizes Organic Matter in Water to CO by Generation of Strong Oxidative OH 2 and H 2 O. Ozone ox...

Claims

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Application Information

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IPC IPC(8): B01J23/14B01J23/63B01J37/02C02F1/72C02F1/78C02F101/30C02F101/32
CPCB01J23/14B01J23/63B01J37/024C02F1/725C02F1/78C02F2101/30C02F2101/322
Inventor 张军权熙尹琳琳
Owner HARBIN INST OF TECH
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