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Method for removing tetracycline in water body by adsorption and catalytic oxidation of Cu-containing biochar

A technology of synergistic catalysis and biochar, applied in the field of tetracycline, can solve the problems of secondary pollution of iron sludge, narrow applicable pH range, etc., and achieve the effects of high removal rate, easy operation and good stability

Pending Publication Date: 2020-12-11
CHINA PHARM UNIV
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AI Technical Summary

Problems solved by technology

However, the applicable pH range of the homogeneous Fenton method is narrow, and it is easy to produce iron sludge and cause secondary pollution, which limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] Preparation of solution B: weigh 0.15mol FeCl 3 ·6H 2 O and 0.15mol CuCl2 2H 2 O, prepare 1L of solution with ultrapure water to obtain B solution;

[0032] Replace the A solution in the step (1.2) with the B solution, and keep the other steps unchanged; finally obtain the Fe-doped and Cu-containing biochar catalyst.

[0033] Further, the specific operation method of using Cu-containing biochar catalyst or Fe-doped Cu-containing biochar catalyst to remove tetracycline in water in a heterogeneous Fenton-like system is as follows: take an appropriate amount of the solution to be treated and adjust its initial pH value, add An appropriate amount of Cu-containing biochar catalyst or Fe-doped Cu-containing biochar catalyst, and then add an appropriate amount of H 2 o 2 , the system was placed in a constant temperature water bath shaker for shaking reaction.

[0034] Further, the concentration of tetracycline in the solution to be treated should be 1-600mg / L; the pH is a...

Embodiment 1

[0036] Add 50 mL of 200 mg / L tetracycline solution to a 100 mL Erlenmeyer flask, adjust the pH to 3, add 3.0 g / L Cu-containing biochar catalyst, and then add 19.8 mmol H 2 o 2 , after sealing with a parafilm, placed in a constant temperature water bath shaker and oscillated under the conditions of 30°C and 120rpm; results: the removal rate of tetracycline can reach 96% when the system is oscillated for 0.5h.

Embodiment 2

[0038] Add 50 mL of 200 mg / L tetracycline solution to a 100 mL Erlenmeyer flask, adjust the pH to 5, add 3.0 g / L Cu-containing biochar catalyst, and then add 19.8 mmol H 2 o 2 , sealed with a parafilm, placed in a constant temperature water bath shaker at 30 ℃, 120rpm shaking; results: the removal rate of tetracycline can reach 91% when the system shakes for 2.0 hours.

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PUM

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Abstract

The invention discloses a method for removing tetracycline in a water body by adsorption and catalytic oxidation of Cu-containing biochar. The invention belongs to the field of sewage treatment in environmental protection. Corn bracts are used as raw materials, and the Cu-containing biochar catalyst is prepared through high-temperature pyrolysis after the raw materials are subjected to dipping ina copper chloride solution and aging . The catalyst can effectively adsorb tetracycline in a water body to achieve removal of tetracycline; meanwhile, the catalyst and a hydrogen peroxide solution canform a heterogeneous Fenton-like system, and hydroxyl radicals (. OH) are generated to degrade tetracycline. Therefore, the purpose of removing tetracycline from the water body can be achieved by utilizing the adsorption synergistic catalytic oxidation effect of the Cu-containing biochar catalyst. The Cu-containing biochar catalyst provided by the invention has the advantages of cheap and easilyavailable preparation raw materials, simple preparation process, high tetracycline removal rate, mild treatment process, no secondary pollution, stable catalyst and recyclability.

Description

technical field [0001] The invention belongs to the field of sewage treatment in environmental protection, and in particular relates to a method for removing tetracycline in water by adsorption and cooperative catalytic oxidation of Cu-containing biochar, in particular to a preparation method thereof. Background technique [0002] Tetracycline is a broad-spectrum antibiotic with low price and wide application range, which is used in disease treatment, aquaculture and animal husbandry. However, because tetracycline cannot be completely metabolized and absorbed in humans and animals, and due to the abuse of tetracycline drugs and excessive addition in livestock and poultry feed, most tetracyclines are released into the environment with excrement in the form of parent compounds or metabolic intermediates. middle. These residual tetracycline precursors and metabolic intermediates in the environment will interfere with the growth and development of plants; affect the distributio...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/72B01J20/20B01J20/30B01J23/745B01J23/72B01J35/10
CPCC02F1/281C02F1/283C02F1/725C02F1/722B01J20/20B01J20/02B01J23/745B01J23/72C02F2101/38C02F2101/34C02F2305/026B01J35/33B01J35/61
Inventor 史静邢超杜琼林梓希
Owner CHINA PHARM UNIV
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