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Active-carbon-loaded manganese dioxide and titanium dioxide ozone catalyst for advanced treatment and preparation method

An advanced treatment, manganese dioxide technology, applied in the field of water pollution treatment, can solve the problems of shortening the reaction time, difficulty in recycling, poor degradation effect, etc., and achieve the effect of solving difficulty in recycling, improving catalytic efficiency, and good COD removal effect

Active Publication Date: 2017-03-29
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a kind of activated carbon loaded MnO for advanced treatment for the pesticide wastewater that is difficult to reach the discharge standard stipulated by the state in the existing advanced treatment technology. 2 -TiO 2 The preparation method of ozone catalyst adopts activated carbon with large specific surface area and good adsorption performance as carrier, and MnO 2 -TiO 2 The immobilization of the catalyst, combined with ozone catalysis, effectively solves the problems of difficult recovery of the suspended catalyst and poor degradation effect, effectively shortens the reaction time, improves the removal efficiency of COD, minimizes energy consumption, saves material costs and operation cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh a certain amount of KMnO 4 and MnSO 4 Dissolve in deionized water respectively, until completely dissolved, MnSO 4 The solution was added dropwise to the KMnO 4 In the solution, mix and stir, add TiO according to the Mn / Ti molar ratio of 1:1 2 powder, stir evenly, transfer it to a polytetrafluoroethylene reactor, react at 180°C for 12 hours, then wash, filter and dry the product to obtain MnO 2 -TiO 2 Composite particles;

[0022] Take a certain amount of MnO 2 -TiO 2 Composite particles, dispersed in deionized water, added activated carbon according to the loading rate of 5%, impregnated in MnO 2 -TiO 2 After soaking in the suspension for 12 hours, place it in a muffle furnace at 350°C for 4 hours to obtain activated carbon-supported MnO 2 -TiO 2 Ozone catalyst particles, the prepared supported ozone catalyst has a COD degradation rate of 70.7% for pesticide wastewater.

Embodiment 2

[0024] Weigh a certain amount of KMnO 4 and MnSO 4 Dissolve in deionized water respectively, until completely dissolved, MnSO 4 The solution was added dropwise to the KMnO 4 In the solution, mix and stir, add TiO according to the Mn / Ti molar ratio of 2:1 2 powder, stir evenly, transfer it to a polytetrafluoroethylene reactor, react at 180°C for 12 hours, then wash, filter and dry the product to obtain MnO 2 -TiO 2 Composite particles;

[0025] Take a certain amount of MnO 2 -TiO 2 Composite particles, dispersed in deionized water, added activated carbon according to the loading rate of 10%, impregnated in MnO 2 -TiO 2 After soaking in the suspension for 12 hours, place it in a muffle furnace at 550°C for 4 hours to obtain activated carbon-supported MnO 2 -TiO 2 Ozone catalyst particles, the prepared supported ozone catalyst has a COD degradation rate of 74.5% for pesticide wastewater.

Embodiment 3

[0027] Weigh a certain amount of KMnO 4 and MnSO 4 Dissolve in deionized water respectively, until completely dissolved, MnSO 4 The solution was added dropwise to the KMnO 4 In the solution, mix and stir, add TiO according to the Mn / Ti molar ratio of 1:1 2 powder, stir evenly, transfer it to a polytetrafluoroethylene reactor, react at 180°C for 12 hours, then wash, filter and dry the product to obtain MnO 2 -TiO 2 Composite particles;

[0028] Take a certain amount of MnO 2 -TiO 2 Composite particles, dispersed in deionized water, added activated carbon according to the loading rate of 10%, impregnated in MnO 2 -TiO 2 After soaking in the suspension for 6 hours, place it in a muffle furnace at 350°C for 4 hours after impregnation to obtain activated carbon-supported MnO 2 -TiO 2 Ozone catalyst particles, the prepared supported ozone catalyst has a COD degradation rate of 54.3% for pesticide wastewater.

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Abstract

The invention relates to an active-carbon-loaded manganese dioxide and titanium dioxide ozone catalyst for advanced treatment and a preparation method. The preparation method comprises: dissolving KMnO4 and an oxidant in deionized water, respectively; till the complete dissolution is completed, adding a MnSO4 solution to the KMnO4 solution drop by drop; adding TiO2 powder, performing a reaction at 180 DEG C for 12 h, and performing washing, filtration and drying to obtain MnO2-TiO2 composite particles; dispersing the composite particles in the deionized water; adding active carbon; performing soaking in a MnO2-TiO2 suspending liquid; and after the soaking is finished, putting the obtained product in a muffle furnace for roasting to obtain active-carbon-loaded manganese dioxide and titanium dioxide ozone catalyst particles. The reaction time can be effectively reduced, the removal efficiency of COD is improved, and the catalyst can be used to the field of water pollution treatment.

Description

technical field [0001] The present invention relates to a kind of activated carbon loading MnO for advanced treatment 2 -TiO 2 The preparation method of the ozone catalyst can solve water pollution problems such as high organic matter content and high COD concentration, and is used in the field of water pollution treatment. Background technique [0002] In recent years, the increasingly serious water pollution has not only reduced the use function of water bodies, further exacerbated the contradiction of water shortage, but also seriously threatened the drinking water safety and health of urban residents. The advanced treatment methods commonly used at home and abroad include: flocculation precipitation method, ozone oxidation, reverse osmosis method, activated carbon method, demulsification, membrane separation method, biological denitrification, dephosphorization method, etc. These technologies have played a certain role in the removal of refractory organic matter, but t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34C02F1/78C02F101/30
CPCB01J23/34C02F1/725C02F1/78C02F2101/30
Inventor 何丹农童琴严良高小迪代卫国金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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