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Activated carbon catalyst used for Fenton-like technology, and preparation and application thereof

A catalyst and activated carbon technology, which is applied in the field of water treatment technology and functional materials, can solve the problems of little research on shaped activated carbon, and achieve the effects of low price, low production cost and mild reaction conditions

Inactive Publication Date: 2015-09-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalysts of heterogeneous (like) Fenton technology generally use alumina and titania as supports, and there are few studies on shaped activated carbon as supports.

Method used

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  • Activated carbon catalyst used for Fenton-like technology, and preparation and application thereof
  • Activated carbon catalyst used for Fenton-like technology, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] ① Prepare a copper nitrate solution with a concentration of 0.82mol / L;

[0027] ②Under normal temperature and pressure, impregnate coconut shell charcoal with an equal volume into copper nitrate solution, soak overnight, dry at 110°C for 2 hours, and then calcined at 450°C for 3 hours to obtain Cu / coconut shell charcoal with an active component loading of 1%. catalyst;

[0028] ③The catalyst is used in a continuous reaction device to treat 100mg / L m-cresol wastewater, the catalyst bed is filled with Cu / coconut shell carbon catalyst, and the initial pH of the wastewater is 7, H 2 o 2 (mg / L): COD (mg / L) is 1, and the waste water space velocity is 1h -1 . See the experimental results figure 1 . Depend on figure 1 It can be seen that when the prepared Cu / coconut shell carbon catalyst (like) Fenton is used to treat refractory m-cresol wastewater under normal temperature and pressure, the removal rate of m-cresol can reach 90%, and the removal rate of COD can reach 70%....

Embodiment 2

[0030] ① Prepare a copper nitrate solution with a concentration of 1.25mol / L;

[0031] ②Under normal temperature and pressure, impregnate an equal volume of coal-based carbon into a copper nitrate solution, soak overnight, dry at 110°C for 2 hours, and then calcinate at 450°C for 3 hours to obtain a Cu / coal with an active component loading of 1%. carbon catalyst;

[0032] ③The catalyst is used in a continuous reaction device to treat metal cutting fluid wastewater with a COD of 500mg / L, and the initial pH of the wastewater is 4, H 2 o 2 (mg / L): COD (mg / L) is 0.4, and the waste water space velocity is equal to 0.9h -1 . The analysis results show that when the prepared Cu / coal-based carbon catalyst (like) Fenton is used to treat refractory metal cutting fluid wastewater under normal temperature and pressure, the COD removal rate reaches 85%, and after 600 hours of continuous reaction, the catalytic activity of the catalyst remains unchanged, and no loss of active component C...

Embodiment 3

[0034] ①The preparation concentration is a mixed solution of 1.0mol / L ferric chloride and 0.82mol / L copper chloride;

[0035] ②Under normal temperature and pressure, impregnate coconut shell charcoal into a mixed solution of ferric chloride and copper chloride in equal volumes, soak overnight, dry at 110°C for 2 hours, and then calcined at 450°C for 3 hours to obtain 1%Fe-1% Cu / coconut shell carbon catalyst;

[0036] ③The catalyst is used in a continuous reaction device to treat 100mg / L m-cresol wastewater, and the initial pH of the wastewater is 7, H 2o 2 (mg / L): COD (mg / L) is 1, and the waste water space velocity is 1h -1 . See the experimental results figure 2 . Depend on figure 2 It can be seen that when the prepared Fe-Cu / coconut shell carbon catalyst (like) Fenton is used to treat refractory m-cresol wastewater under normal temperature and pressure, the removal rate of m-cresol can reach 90%, and the removal rate of COD can reach 55%. %, and after continuous rea...

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Abstract

The invention relates to an activated carbon catalyst used for treating refractory organic wastewater with a Fenton-like technology, and preparation and application thereof. The catalyst is prepared by using an isopyknic impregnation method with transition metals - Cu, Fe, Ni and Mn or rare earth elements as active components and formed activated carbon as a carrier; and the catalyst is mainly used for treating refractory organic wastewater, or wastewater failing to achieve standards after treated by using a biochemical method. The activated carbon catalyst provided by the invention treats the wastewater at room temperature without adjustment of the pH value of the wastewater, wherein the concentration ratio of H2O2 (mg / L) to COD (mg / L) is 0.3 to 1.5, and airspeed is 0.5 to 2.0 h<-1>. According to the invention, COD removal rate is greater than 50%; BOD5 / COD indexes of the wastewater before and after treatment is significantly enhanced; biodegradability of the wastewater is improved; and the catalyst is capable of continuously operating for more than 700 hours with unchanged catalytic activity, and can be popularized in industrial application of treating industrial wastewater, specifically the refractory organic wastewater, by using the Fenton-like method.

Description

technical field [0001] The invention relates to a supported catalyst with transition metals Cu, Fe, Ni, Mn and rare earth elements as active components and shaped activated carbon as a carrier and a preparation method thereof, which can be used for multi-phase (like) Fenton (Fenton) advanced treatment Various industrial wastewater, especially refractory organic wastewater, belongs to the field of water treatment technology and functional materials. Background technique [0002] Catalytic Wet Peroxide Oxidation (CWPO) is a kind of Advanced Oxidation Process (AOPs), which was first discovered and proposed by Fenton in 1894, so it is also called Fenton technology. CWPO technology refers to the use of hydrogen peroxide as an oxidant, which catalyzes the decomposition of hydrogen peroxide into more oxidative hydroxyl radicals (OH) during the reaction process, and then oxidizes organic pollutants into small molecular organic compounds and even directly mineralizes them into H 2 O...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J23/745B01J23/755B01J23/34B01J23/10B01J23/889C02F1/72C02F101/30
Inventor 孙承林刘培娟蒋文天卫皇曌赵颖
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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