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Method for preparing magnetic charcoal material, device adopting method and application

A magnetic material, biochar technology, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problems of high preparation cost and complex preparation process of magnetic biochar, and achieve enhanced adsorption capacity and variable charge. The effect of increased quantity and easy regeneration

Active Publication Date: 2019-04-16
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is to overcome the problems of complex preparation process and high preparation cost of magnetic biochar existing in the prior art, and to provide a preparation method of magnetic biochar material and its device and application

Method used

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  • Method for preparing magnetic charcoal material, device adopting method and application
  • Method for preparing magnetic charcoal material, device adopting method and application
  • Method for preparing magnetic charcoal material, device adopting method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A preparation method of magnetic biochar material, such as figure 1 , comprising the following steps: comprising the following steps: step (1): performing high-temperature anaerobic pyrolysis of sewage treatment plant sludge to obtain sludge biochar; step (2): drying the sludge biochar obtained in step (1) Fine grinding method to obtain biochar powder; step (3): carry out dry magnetic separation to the sludge biochar powder obtained in step (2) to obtain a magnetic material; step (4): subject the magnetic material obtained in step (3) to The granular material obtained after humidity adjustment and granulation is sintered at a high temperature under a protective atmosphere to obtain a sintered material; step (5): cooling the sintered material obtained in step (4) with the furnace to obtain a porous magnetic biochar material.

[0058] Preferably, the waste heat flue gas generated by sintering in the step (4) is recycled to the high-temperature anaerobic pyrolysis process ...

Embodiment 2

[0061] Adsorption test: Add the SBC-N prepared in Example 1 to the CIP aqueous solution, shake at a frequency of 200r / min in a constant temperature dark shaker at 30°C, and then. Sampling through a 0.45 μm filter membrane to obtain the sample to be tested for CIP detection.

[0062] CIP detection: the mass concentration of CIP was detected by high performance liquid chromatography (HPLC, Hitachi L-2000, Japan). Test conditions: mobile phase is 0.02mol / L trichloroacetic acid, methanol and acetonitrile (74:22:4, volume ratio), using C-18 chromatographic column (250mm×4.6mm, 5-Micron 80A), column oven temperature The temperature is 30°C, and the excitation wavelength is 278nm. CIP removal rate (r), adsorption capacity at time t (q t ) and the equilibrium adsorption capacity (q e ) is calculated as follows:

[0063]

[0064]

[0065] Where t(h) is the adsorption time, q t (mg / g) is the adsorption amount when the adsorption time is t; C 0、 and C t (mg / L) are the initia...

Embodiment 3

[0067] The influence of embodiment 3 adsorption time on CIP adsorption

[0068] The SBC-N prepared in Implementation 1 was subjected to an adsorption test according to the method in Implementation 1, and samples were taken through a 0.45 μm filter membrane at 0, 0.5, 1, 2, 5, 8, 12, and 24 hours to obtain samples to be tested, and then CIP detection was performed. .

[0069] The effect of adsorption time on CIP adsorption is shown in figure 2, it can be seen that after adding SBC-N, the concentration of CIP in the solution continuously decreases along with the increase of time, the residual concentration of CIP in the solution after 24 hours95% by weight, it can be seen that the present invention The prepared magnetic biochar material has fast adsorption speed and quick effect.

[0070] After the prepared magnetic biochar material adsorbs fluoroquinolone antibiotics, thermal desorption is performed under an inert gas (nitrogen, argon or helium). The thermal desorption tempe...

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Abstract

The invention relates to a method for preparing a magnetic charcoal material, a device adopting the method and application. The method comprises the following steps that sewage treatment plant sludgeis subjected to high-temperature anaerobic pyrolysis, and sludge charcoal is obtained; then dry fine grinding is carried out, and charcoal powder is obtained; the sludge charcoal powder is subjected to dry magnetic separation, a magnetic material is obtained, granules obtained after humidifying and pelleting are subjected to high-temperature sintering in protective atmosphere, and sintered materials are obtained; furnace cooling is carried out, and the magnetic charcoal material of a porous structure is obtained. According to the method, the magnetic material is separated out of the sludge pyrolysis product charcoal and is used for preparing the magnetic charcoal material, the magnetic charcoal material is used for efficiently adsorbing and removing quinolone antibiotics such as ciprofloxacin, recycling utilization of the sludge charcoal is achieved, the preparation cost of the adsorption materials is reduced, the process is simple, high practicality is achieved, and good economic benefits and environmental benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of utilization of sludge biochar and treatment of antibiotic wastewater, in particular to a preparation method of a magnetic biochar material and its device and use. Background technique [0002] Fluoroquinolones (fluoroquinolones, FQs) antibiotics are developed on the basis of quinolone antibiotics by introducing fluorine atoms, and are fully synthetic broad-spectrum antibacterial drugs. FQs are effective in treating diseases caused by bacterial infections in humans and animals, have good pharmacokinetic properties, and have been widely used in the pharmaceutical industry and animal husbandry. In 2009, its usage was already at the forefront of anti-infective drugs, accounting for 17% of the global antibiotic market share. Studies have shown that the metabolic rate of FQs in the body is less than 25%, except for a small part remaining in the body, more than 75% are excreted in the form of the original drug ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F103/34
CPCB01J20/20B01J20/28009B01J2220/4887C02F1/281C02F2103/343
Inventor 余广炜汪刚汪印
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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