Magnetic biochar adsorbing material and preparation method thereof

An adsorption material and biochar technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of poor connection stability and fast separation speed between magnetic particles and biomass, and achieve a Good appearance, fast separation speed, and stable magnetic core performance

Inactive Publication Date: 2017-02-01
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0007] In view of the above defects or improvement needs of the prior art, the object of the present invention is to provide a magnetic biochar adsorption material and its preparation method, wherein the key biomass raw material pretreatment process and solvothermal reaction in the preparation method are specifically Conditions (including the composition and proportion of

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  • Magnetic biochar adsorbing material and preparation method thereof
  • Magnetic biochar adsorbing material and preparation method thereof
  • Magnetic biochar adsorbing material and preparation method thereof

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preparation example Construction

[0035] The preparation method of magnetic biochar adsorption material among the present invention, comprises the following steps:

[0036] (1) Preparation of biochar: use plant biomass (such as agricultural and forestry waste) as raw material after washing, drying, crushing, and powder passing through a 60-mesh sieve, and roast and activate it at 200-1000°C under anaerobic conditions, and the roasting time is controlled In 1-4h, biochar is obtained.

[0037] (2) Preparation of ferric iron precursor solution: ferric salt is dissolved in ethylene glycol by magnetic stirring, and the ratio of solid mass and liquid volume of ferric salt to ethylene glycol is 1: (20-100) (unit mg / L), preferably 1:60, then add anhydrous sodium acetate and surfactant, continue stirring to form a uniform ferric precursor solution, ferric salt in the precursor solution: anhydrous sodium acetate: surface The mass ratio of active agent is controlled between 1:12:3.5-21.

[0038] (3) Preparation of magn...

Embodiment 1

[0043] The preparation method and application examples of the magnetic biochar adsorption material in this embodiment include the following steps:

[0044] (1) Preparation of biochar: the agricultural and forestry wastes are the fallen leaves of sycamore collected in the campus, and the powder after washing, drying, crushing and passing through 60 meshes is used as the raw material. Get sycamore leaf biochar, figure 2 Its SEM image.

[0045] (2) Preparation of ferric iron precursor: take 2.7g FeCl 3 ·6H 2 O was dissolved in 80mL of ethylene glycol solution, and then 7.2g of anhydrous sodium acetate and 2g of polyethylene glycol (molecular weight: 4000) were added to it, and stirred continuously for 30min by magnetic stirring to form a uniform emulsion.

[0046] (3) Preparation of magnetic biochar by solvothermal reaction: add 0.77 g of sycamore-based biochar to the above emulsion, and stir for 2 hours by magnetic force to fully mix the biochar and emulsion.

[0047] (4) P...

Embodiment 2

[0050] The preparation method and application examples of the magnetic biochar adsorption material in this embodiment include the following steps:

[0051] (1) Preparation of biochar: the agricultural and forestry wastes are the fallen leaves of sycamore collected in the campus, and the powder after washing, drying, crushing and passing through 60 meshes is used as the raw material. Get sycamore leaf biochar.

[0052] (2) Preparation of ferric iron precursor: take 2.7g FeCl 3 ·6H 2 O was dissolved in 80mL of ethylene glycol solution, and then 7.2g of anhydrous sodium acetate and 2g of polyethylene glycol (molecular weight: 4000) were added to it, and stirred continuously for 30min by magnetic stirring to form a uniform emulsion.

[0053] (3) Preparation of magnetic biochar by solvothermal reaction: add 1.54 g of sycamore-based biochar to the above emulsion, and stir for 2 hours by magnetic force to fully mix the biochar and emulsion.

[0054] (4) Pour the mixed emulsion int...

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Abstract

The invention discloses a magnetic biochar adsorbing material and a preparation method thereof. The preparation method comprises the following steps: (1) preparation of biochar: by using powder obtained by treating plant biomass as a raw material, roasting under oxygen-free conditions to obtain porous biochar; (2) preparation of ferric iron precursor liquid: by using ethanediol as a dispersing agent, adding a solid-state ferric iron salt, continuing adding sodium acetate and a surfactant into the ethanediol, and stirring to form a disperse system which is the ferric iron precursor liquid; and (3) solvothermal reaction: uniformly mixing the biochar and ferric iron precursor solution to obtain a mixture, putting the mixture into a teflon hydrothermal reaction kettle, and carrying out solvothermal reaction to obtain the magnetic biochar adsorbing material. The pretreatment technique of the key biomass raw material and the specific conditions of solvothermal reaction in the preparation method are improved, thereby effectively solving the problem of poor connection stability between the magnetic biochar material magnetic particles and biomass.

Description

technical field [0001] The invention belongs to the field of waste treatment, and more specifically relates to a magnetic biochar adsorption material and a preparation method thereof, which is especially suitable for the recycling of plant-based waste (such as plant biomass, such as agricultural and forestry waste), and the prepared magnetic Biochar can be used as an adsorbent material. Background technique [0002] Agricultural and forestry waste mainly includes fruit residues, bark, straw, rice husk, etc., and is an important part of plant biomass, one of the three major types of biomass (the other two types of biomass are animal biomass and microbial biomass. ). A large amount of agricultural and forestry wastes are produced in my country every year. In the vast rural areas, these wastes are mainly used for direct combustion to produce heat, and some of them are used as feed, fertilizer and raw materials for pulp and paper industry, but the utilization rate is not enough...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/48C02F101/20C02F101/30
CPCB01J20/20B01J20/28009B01J2220/4825B01J2220/485B01J2220/4887C02F1/283C02F1/488C02F2101/20C02F2101/308
Inventor 梁莎石顺权杨家宽甘泉李名扬张昊昊曾晓会胡雨辰虞文波陈烨胡勇胡敬平候慧杰刘冰川
Owner HUAZHONG UNIV OF SCI & TECH
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