Method for degrading sulfamethoxazole by using biochar to activate bicarbonate peroxide

A technology of peroxybicarbonate and sulfamethoxazole, which is applied in the field of using biochar to activate peroxycarbonate to degrade sulfamethoxazole, can solve the problems of limited application and secondary pollution, and achieve high degradation efficiency, The effect of low cost and simple operation

Pending Publication Date: 2021-12-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, due to their high catalytic activity, metal-based catalysts are widely used for the activation of percarbonate, but their application is limited by the secondary pollution caused by the dissolution of heavy metals.

Method used

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  • Method for degrading sulfamethoxazole by using biochar to activate bicarbonate peroxide
  • Method for degrading sulfamethoxazole by using biochar to activate bicarbonate peroxide
  • Method for degrading sulfamethoxazole by using biochar to activate bicarbonate peroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: the preparation of raw material biochar

[0035] The purchased wood chips, wheat stalks, corn stalks and bamboo were ground and passed through a 40-mesh sieve, washed repeatedly with deionized water, and dried at 80°C. Under oxygen-deficient conditions, heat up to 500°C in a muffle furnace at a heating rate of 10°C / min, and calcinate for 2 hours. After natural cooling, the obtained material was washed with ultrapure water until the water absorbance value of the soaked biochar at a wavelength of 245 nm was less than 0.05. The cleaned biochar was dried at 80°C, cooled and stored in an airtight manner.

Embodiment 2

[0036] Example 2 Biochar activates peroxybicarbonate

[0037] The biochar prepared in Example 1 was soaked in ultrapure water. After soaking for 24 hours, take 1g / L and add hydrogen peroxide to 10mM, sodium bicarbonate solution to 250mM, and disodium hydrogen phosphate to 10mM. Make the pH of the reaction system around 9. At room temperature (25±2° C.), the reaction was initiated and maintained as a homogeneous system by mixing the suspension at 200 rpm. At the beginning of the reaction and after 6 hours of reaction, take 1mL samples of the supernatant and quickly push them through a membrane filter holder equipped with a 0.45μm membrane to filter, add 1mL of 0.5M sulfuric acid, 0.1M titanyl sulfate, and 7.9mL of ultrapure water and shake well Immediately use a UV spectrophotometer to measure the absorbance at 410nm to obtain the absorbance of hydrogen peroxide. Since hydrogen peroxide and peroxybicarbonate are the relationship between the reactant and the product (see formu...

Embodiment 3

[0046] Example 3 Biochar activates peroxybicarbonate to remove sulfamethoxazole in water

[0047] The biochar prepared in Example 1 was soaked in ultrapure water at 1 g / L. After soaking for 24 hours, add hydrogen peroxide to 10 mM, sodium bicarbonate solution to 250 mM, disodium hydrogen phosphate to 10 mM, and sulfamethoxazole to 20 μM. Make the pH of the reaction system around 9. At room temperature (25±2° C.), the reaction was initiated and maintained as a homogeneous system by mixing the suspension at 200 rpm. At the beginning of the reaction and after 6 hours of reaction, take 1mL samples of the supernatant and add the extract (0.1M NaOH:methanol=1:1), and shake the mixture at 200rpm for 10 minutes on a constant temperature shaker to make the SMX adsorbed on the biochar desorption. Then, the extracted mixture was quickly pushed through a membrane filter holder equipped with a 0.22 μm membrane into a high performance liquid chromatography (HPLC) vial using a 1 mL plasti...

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Abstract

The invention relates to a method for degrading sulfamethoxazole by using biochar to activate bicarbonate peroxide. The method adopts four types of biochar to degrade sulfamethoxazole in a water body, and the biochar is prepared by pyrolyzing sawdust, wheat straw, corn straw and bamboo as raw materials at 500 DEG C. According to the method disclosed by the invention, the sulfamethoxazole is treated by adopting the biochar to activate the bicarbonate peroxide, so that the sulfamethoxazole can be effectively treated, and the method has the advantages of simplicity in preparation, low cost, strong catalytic performance, strong anti-interference capability, good dispersity, strong stability and easiness in recycling and reutilization, and has a good application prospect in a water body polluted by sulfamethoxazole.

Description

technical field [0001] The invention belongs to the field of advanced oxidation treatment of sulfonamide pollutants, and relates to a method for activating peroxybicarbonate to degrade organic matter by using biomass materials, in particular to a method for activating peroxybicarbonate to degrade sulfamethoxazole by using biochar . Background technique [0002] Sulfamethoxazole is a common sulfonamide antibiotic, which is usually widely used clinically as a broad-spectrum antibacterial agent. Abuse of antibiotics can lead to water pollution, long-term adverse effects on ecosystems, and lead to the emergence of antibiotic-resistant pathogenic microorganisms. To date, sulfamethoxazole has been detected in various municipal sewage treatment plants, hospital sewage, surface water, and even drinking water systems. Sulfamethoxazole is widely used, it is difficult to degrade in natural water bodies, and it is difficult to effectively remove it by conventional water treatment meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05B01J21/18C02F1/72C02F101/38
CPCC01B32/05B01J21/18C02F1/722C02F1/725C02F2101/38C02F2101/40
Inventor 孙佩哲马原白银晓
Owner TIANJIN UNIV
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