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Catalytic ozonation catalyst for wastewater treatment and preparation method thereof

A technology of ozone catalytic oxidation and wastewater treatment, applied in the field of water treatment, can solve the problems of complex catalyst preparation process, low catalyst COD removal rate, short catalyst service life, etc., and achieve long service life, no secondary pollution, and low cost Effect

Inactive Publication Date: 2016-05-04
KMD BEIJING ENERGY & ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing catalytic ozonation technology has the characteristics of mild reaction conditions, high oxidation activity and no secondary pollution, it also has the problems of low catalyst COD removal rate, complex catalyst preparation process, and short service life of the catalyst, which needs further improvement

Method used

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  • Catalytic ozonation catalyst for wastewater treatment and preparation method thereof

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preparation example Construction

[0032] In the embodiment of the present invention, the catalyst can have a better active component distribution state by adding a dispersant during the catalyst preparation process. The dispersant in the embodiment of the present invention is a surfactant with excellent dispersing performance and wetting performance, and has the function of making various metal salts uniformly disperse on the surface of the pores of the carrier. The embodiment of the present invention provides The ozone catalytic oxidation catalyst has higher COD removal rate, longer service life and simple preparation process. After ozone catalytic oxidation treatment, the COD removal rate in refining and chemical reverse osmosis concentrated water can reach more than 60%, and the biodegradability BOD / COD of wastewater can be increased to more than 0.30; the COD removal rate in phenolic wastewater can reach about 90% . And no secondary pollution, low cost, very suitable for industrial production.

[0033] I...

Embodiment 1

[0035] Embodiment 1 prepares Fe-Mn-Na / alumina catalyst

[0036] (1) Measure 1wt.% Fe(NO 3 ) 3 , Mn(NO 3 ) 2 、NaNO 3 Solution 170ml, 43ml and 17ml were prepared as mixed impregnating solution A.

[0037] (2) Add 100 g of octadecyltrimethylammonium bromide to the above mixed impregnating solution A to prepare mixed impregnating solution B.

[0038] (3) Spray and impregnate the above mixed impregnating solution B on 500g shaped alumina carrier by equal volume impregnation method, then seal and cure for 4h, then dry at 100°C for 5h, and finally roast at 400°C for 4h to obtain catalyst A.

Embodiment 2

[0039] Embodiment 2 prepares Fe-Cu-K / activated carbon catalyst

[0040] (1) Measure 15wt.% Fe(NO 3 ) 3 , Cu(NO 3 ) 2 、KNO 3 170ml, 80ml and 10ml of the solutions were prepared as mixed dipping solution A.

[0041] (2) Add 260 g of butyl octyl phosphorodithioate to the above mixed impregnating solution A to prepare mixed impregnating solution B.

[0042] (3) Spray and impregnate the above mixed impregnating solution B on 500 g of shaped activated carbon carrier by equal volume impregnation, then cure in air for 12 h, then dry at 120 °C for 4 h, and finally roast at 600 °C for 4 h to obtain catalyst B.

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Abstract

The invention belongs to the technical field of water treatment, and in particular relates to a catalytic ozonation catalyst for the wastewater treatment and a preparation method thereof. The catalyst is prepared from an active component, an auxiliary and a carrier, wherein the active component is a transition metal oxide, the auxiliary is an alkali metal oxide, an alkaline earth metal oxide or a lanthanide metal oxide, and the carrier is an aluminum oxide, active carbon or ceramsite. The invention further provides a preparation method of the catalyst. The preparation method comprises the steps: loading the active component, the auxiliary and a dispersing agent on the carrier by utilizing an impregnation method or a dry mixing method, curing, drying and roasting, thereby obtaining the catalyst. According to the catalytic ozonation catalyst for the wastewater treatment and the preparation method thereof, the COD removal rate is higher, and the service life is longer; the preparation process is simple, the costs are low, no secondary pollution exists, and the catalytic ozonation catalyst for the wastewater treatment and the preparation method thereof are very suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an ozone catalytic oxidation catalyst for wastewater treatment and a preparation method thereof. Background technique [0002] With the development of society, more and more artificially synthesized compounds have entered the water body, resulting in some highly stable and difficult-to-oxidize organic compounds in the water body, which have caused serious damage to the water environment. The economical and effective removal of such refractory organic pollutants in water has become a hot spot in research and engineering applications in the field of water treatment. [0003] In recent years, the advanced oxidation technology researched and developed using ozone as an oxidant can oxidize and decompose toxic and refractory organic pollutants in water, and has received more and more attention. Although pure ozone can degrade organic matter, it is selective and has...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J23/78
CPCB01J21/06B01J23/78B01J23/80B01J23/83B01J23/889C02F1/78B01J23/002B01J23/8892B01J2523/00B01J2523/842B01J2523/72B01J2523/12B01J2523/31B01J2523/17B01J2523/13B01J2523/3712B01J2523/847B01J2523/3706
Inventor 李国文张玉芬王彦成张学辉高阳毛文君
Owner KMD BEIJING ENERGY & ENVIRONMENT TECH CO LTD
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