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Biochar composite material and preparation method and application thereof

A technology of composite materials and biochar, applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve the problems of easy agglomeration of particles and limit the practical application of adsorbents, and achieve high activity, easy mass production, Prepare fast results

Inactive Publication Date: 2020-03-24
HUNAN FIRST NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanometer-sized MnO x Particles are prone to agglomeration, which limits its practical application as an adsorbent

Method used

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  • Biochar composite material and preparation method and application thereof
  • Biochar composite material and preparation method and application thereof
  • Biochar composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Biochar composites, including biochar and nano-MnO uniformly doped in biochar 2 , biochar and nano MnO 2 The mass ratio is 100:1, and its specific surface area is 65 m 2 / g. Its topography is as figure 1 and figure 2 shown.

[0054] The preparation steps of this material are as follows:

[0055] (1) Firstly, the biochar material is prepared by pyrolysis method: the mixture containing chaff powder, formic acid and manganese chloride (mass ratio of chaff powder, formic acid and manganese chloride is 100:1.5:1.5) is loaded into quartz trough, and then placed in a quartz tube furnace. Seal both ends of the quartz tube, connect the hose, and fill the tube furnace chamber with N from one end. 2 (400 mL / min), maintain an inert atmosphere during the pyrolysis process, and collect the volatile products produced during the pyrolysis process of biomass from the other end. The temperature was programmed to rise to 773 K at a rate of 283 K / min, and kept at the peak temperat...

Embodiment 2

[0058] Adopt the biochar composite material BC / MnO of embodiment 1 2 The method of treating antibiotic wastewater. Typical antibiotics are tetracycline hydrochloride (TC) and doxycycline (DC) as examples. The principle of action is as follows:

[0059] The new biochar composite material obtained in step (2) in Example 1, due to the introduction of MnO 2 Compared with the original biochar, manganese element appears on the surface of the composite material, the carbon content decreases, the oxygen content increases, the total pore volume of the material increases, and the specific surface area and pore structure are improved, resulting in a significant increase in the adsorption performance of the composite material for antibiotics in aqueous solution. promote.

[0060] In order to study the removal efficiency of TC and DC. Two typical antibiotic solutions (tetracycline hydrochloride and doxycycline) with an initial concentration of 5 mg / L were prepared respectively, and the p...

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Abstract

The invention discloses a biochar composite material which comprises biochar and nano MnO2 uniformly doped in the biochar, and the mass ratio of the biochar to the nano MnO2 is (50-300):1; the specific surface area of the biochar composite material is 30-100 m<2> / g. According to the biochar composite material provided by the invention, the used raw materials are easy to obtain and low in price; the preparation process and operation are simple, the preparation is rapid, the production period is short, special chemical equipment is not needed, and mass production is easy; the product disclosed by the invention is non-toxic, environment-friendly, high in activity and high in removal efficiency of antibiotics in a water body.

Description

technical field [0001] The invention belongs to the field of carbon materials, and in particular relates to a biochar composite material and its preparation method and application. Background technique [0002] Antibiotics are commonly used to fight disease and prevent microbial infections in humans and animals. China leads the world in antibiotic production capacity, with an annual output of about 210,000 tons, 85% of which is used for animals, agriculture and medicine. The widespread use of antibiotics has resulted in their residues being routinely detected in surface and groundwater across the country. Antibiotics remain in soil and sediments, thereby adversely affecting ecosystem function. It may also have adverse effects on human health through endocrine disruption, and long-term exposure at relatively low concentrations can induce resistance gene formation. Therefore, antibiotic-containing wastewater must be treated before being discharged into the aquatic environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/34C02F101/36C02F101/38
CPCB01J20/06B01J20/20B01J20/28059C02F1/288C02F2101/34C02F2101/345C02F2101/36C02F2101/38
Inventor 蔡晓曦李江
Owner HUNAN FIRST NORMAL UNIV