Method for degrading tetracycline by activating persulfate with cerium-manganese modified charcoal

A technology for activating persulfate and persulfate, which can be used in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., and can solve problems such as high cost and low removal rate

Inactive Publication Date: 2021-09-10
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the object of the present invention is to solve the problems of high cost and low removal rate of the existing methods for treating antibiotic wastewater, and provide a method for activating persulfate to degrade tetracycline with cerium-manganese modified biochar, which is simple to operate , to achieve waste recycling while enhancing the removal capacity of tetracycline in water

Method used

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  • Method for degrading tetracycline by activating persulfate with cerium-manganese modified charcoal
  • Method for degrading tetracycline by activating persulfate with cerium-manganese modified charcoal
  • Method for degrading tetracycline by activating persulfate with cerium-manganese modified charcoal

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Embodiment 1

[0036] Preparation of biochar: Green tea leaves were washed with deionized water, dried in an oven at 80°C for 12 hours, cut into pieces with a diameter of 2mm, ground and passed through a 100-mesh sieve to obtain green tea powder, and 3g of green tea powder was put into a tube In the furnace, under vacuum conditions, the temperature was raised to 400 °C at a rate of 5 °C / min, and the calcination was continued at this temperature for 2 h, and then cooled to room temperature to obtain biochar BC.

Embodiment 2

[0038] Preparation of MnCeOx: 0.25mol CeCl 3 ·7H 2 O, 0.1mol KMnO 4 and 0.15mol MnCl 2 4H 2 O was added to 100mL deionized water to dissolve to obtain solution A, and 1mol / L sodium hydroxide solution was added dropwise to solution A and stirred until the pH reached 9.5, and left to stand for 4h to obtain MnCeOx suspension, and MnCeOx The suspension was centrifuged for 4 minutes in a centrifuge with a centrifugal speed of 3000r / min to obtain the precipitated substance after centrifugation; the precipitated substance was washed 8 times with ethanol and deionized water respectively, and then dried at a temperature of 100°C for 6 hours, and the dried The precipitated material was ground through a 100-mesh sieve to obtain the MnCeOx precursor. Put 3g of the MnCeOx precursor into a tube furnace, raise the temperature to 400°C at a rate of 5°C / min under vacuum, and continue calcination at this temperature for 2h, and then cool to room temperature to obtain MnCeOx.

Embodiment 3

[0040] Preparation of MnCeOx / BC: Green tea leaves were washed with deionized water, dried in an oven at 80° C. for 12 hours, cut into pieces with a diameter of 2 mm, ground and passed through a 100-mesh sieve to obtain green tea powder. 0.25mol CeCl 3 ·7H 2 O, 0.1mol KMnO 4 and 0.15mol MnCl 2 4H 2O was added into 100mL deionized water to dissolve to obtain solution A, and 2g of green tea powder was added to mixed solution A and stirred for 0.5h to obtain mixed solution B. Add 1 mol / L sodium hydroxide solution dropwise to solution B and stir until the pH reaches 9.5, and let it stand for 4 hours to obtain a MnCeOx / BC suspension. Centrifuge in a centrifuge for 4 min to obtain the precipitated material after centrifugation; wash the precipitated material 8 times with ethanol and deionized water respectively, then dry it at 100°C for 6 hours, and grind the dried precipitated material through a 100-mesh sieve to obtain MnCeOx / BC precursor. Put 3g of MnCeOx / BC precursor into a...

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Abstract

The invention discloses a method for degrading tetracycline by activating persulfate with cerium-manganese modified charcoal, and belongs to the field of environmental functional materials and biomass resource utilization. The cerium-manganese modified biochar is prepared by compounding cerium-manganese and biochar. The process is simple, the defects that in the prior art, biochar is poor in activation performance, and metal oxide is prone to agglomeration are overcome, and a novel composite catalytic material which is environmentally friendly, good in stability, good in dispersity and high in catalytic activity is provided. The preparation raw materials are stable in source and low in cost, tetracycline degradation of persulfate can be enhanced, and meanwhile a new way is provided for waste resource utilization. So far, a method for degrading tetracycline by activating persulfate through cerium-manganese modified charcoal is not reported, and the method has important significance in widening the application range of an advanced oxidation process based on persulfate in the field of environmental pollutant treatment.

Description

technical field [0001] The invention belongs to the field of environmental functional materials and biomass resource utilization, and specifically relates to a method for using cerium-manganese modified biochar to activate persulfate to degrade tetracycline. Background technique [0002] In recent years, surface water and groundwater around the world have been contaminated by antibiotics to varying degrees. As a commonly used antibiotic, tetracyclines are continuously released into the environment, causing them to widely exist in surface water, groundwater, and even drinking water. They have high antibacterial properties and are difficult to biodegrade. Traditional sewage biological treatment methods cannot be completely degraded. It is very harmful to water pollution. Therefore, it is urgent to remove the pollution caused by tetracycline in the water environment. [0003] At present, many methods have been developed at home and abroad to remove tetracycline in water. Phy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J23/34B01J37/08C02F101/34C02F101/38
CPCC02F1/722C02F1/725B01J23/34B01J23/002B01J37/082C02F2101/34C02F2101/345C02F2101/38C02F2305/023C02F2305/02
Inventor 张亚楠王利平蒋善庆徐凯琳康旭栋
Owner CHANGZHOU UNIV
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