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Magnetic biochar and preparation method thereof

A biochar and magnetic technology, applied in the field of biomass resource utilization, can solve the problems of poor adsorption performance of biochar, and achieve the effect of improving adsorption performance and facilitating regeneration and recycling.

Inactive Publication Date: 2020-04-24
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of magnetic biochar and its preparation method, aiming at solving the problem that the adsorption performance of existing biochar is relatively poor

Method used

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  • Magnetic biochar and preparation method thereof
  • Magnetic biochar and preparation method thereof

Examples

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Embodiment 1

[0065] 5.0g biomass material particles were weighed and placed in a hydrothermal reactor, 50ml of deionized water was added, the reactor was sealed, and the reactor was placed in an electric heating blast drying box, and the reaction temperature was set to 240°C, The reaction time is set to 24h. After the heating reaction is completed, the reaction kettle is taken out, and the product is filtered and separated. After that, the product is washed with deionized water until it is neutral, and then placed in a drying box for drying treatment to obtain biochar. .

[0066] Take 5g of biochar, mix it with 2mol / L nitric acid solution in a 250ml conical flask according to the ratio of solid-liquid ratio of 1:10, and place it in an oven, set the oven temperature to 110°C, soak for 2h, After soaking, the temperature of the drying box was lowered to room temperature, and the acid-modified biochar was taken out, washed with deionized water until the supernatant was neutral, and dried to ob...

Embodiment 2

[0069] 5.0g biomass material particles were weighed and placed in a hydrothermal reactor, 50ml of deionized water was added, the reactor was sealed, and the reactor was placed in an electric heating blast drying box, and the reaction temperature was set to 240°C, The reaction time is set to 24h. After the heating reaction is completed, the reaction kettle is taken out, and the product is filtered and separated. After that, the product is washed with deionized water until it is neutral, and then placed in a drying box for drying treatment to obtain biochar. .

[0070] Take 5g of biochar, mix it with 2mol / L nitric acid solution in a 250ml conical flask according to the ratio of solid-liquid ratio of 1:10, and place it in an oven, set the oven temperature to 110°C, soak for 2h, After soaking, the temperature of the drying box was lowered to room temperature, and the acid-modified biochar was taken out, washed with deionized water until the supernatant was neutral, and dried to ob...

Embodiment 3

[0073] 5.0g biomass material particles were weighed and placed in a hydrothermal reactor, 50ml of deionized water was added, the reactor was sealed, and the reactor was placed in an electric heating blast drying box, and the reaction temperature was set to 240°C, The reaction time is set to 24h. After the heating reaction is completed, the reaction kettle is taken out, and the product is filtered and separated. After that, the product is washed with deionized water until it is neutral, and then placed in a drying box for drying treatment to obtain biochar. .

[0074] Take 5g of biochar, mix it with 2mol / L nitric acid solution in a 250ml conical flask according to the ratio of solid-liquid ratio of 1:10, and place it in an oven, set the oven temperature to 110°C, soak for 2h, After soaking, the temperature of the drying box was lowered to room temperature, and the acid-modified biochar was taken out, washed with deionized water until the supernatant was neutral, and dried to ob...

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Abstract

The invention discloses magnetic biochar and a preparation method thereof. The preparation method comprises the steps: carbonizing a biomass material to prepare biochar, then mixing the biochar with anitric acid solution to prepare acid-modified biochar, and mixing the acid-modified biochar with an alkaline mixed solution of FeCl3 and FeCl2 under the protection of inert gas to prepare the magnetic biochar. According to the method, the biochar is modified by nitric acid, so that the metal adsorption performance of the biochar is improved; meanwhile, Fe3O4 is modified on the surface of the acid-modified biochar to obtain the magnetic biochar; and after sewage is treated, the magnetic biochar is easily separated from water, so that regeneration and cyclic utilization of the magnetic biocharare facilitated.

Description

technical field [0001] The invention relates to the field of biomass resource utilization, in particular to a magnetic biochar and a preparation method thereof. Background technique [0002] Biochar is a kind of refractory, stable, highly aromatic, carbon-rich solid material produced by biomass under high temperature and anoxic conditions. Biochar has the characteristics of rich functional groups, high specific surface area, strong corrosion resistance, and strong adsorption capacity. It can be used as a soil conditioner to improve soil fertility, promote crop growth, and inhibit the release of greenhouse gases. Remediation of contaminants in soil or water bodies. [0003] As an efficient adsorbent, biochar has a strong adsorption capacity for heavy metal ions in water. However, due to the small diameter of biochar particles, it is difficult to separate from water after sewage treatment, which is easy to cause water pollution. Secondary pollution is not conducive to the re...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28C02F1/28B01J20/30
CPCB01J20/20B01J20/28009C02F1/283
Inventor 周子凡张迟钟志成
Owner FOSHAN UNIVERSITY
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