Modified biochar and preparation method, use method and recycling method thereof

A biochar and modification technology, applied in the field of biomass resource utilization, can solve problems such as the adsorption capacity cannot meet the requirements, and achieve the effects of short time consumption, alleviation of water eutrophication, and simple operation.

Inactive Publication Date: 2020-08-25
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When raw biochar materials are used as adsorbents, their adsorption capacity usually cannot meet the requirements

Method used

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  • Modified biochar and preparation method, use method and recycling method thereof
  • Modified biochar and preparation method, use method and recycling method thereof
  • Modified biochar and preparation method, use method and recycling method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In the modified biochar of this embodiment, the mass ratio of cyanobacteria to lanthanum chloride is 1:2.5, and the concentration of lanthanum chloride solution is 1mol / L.

[0027] The preparation method of the modified biochar of the present embodiment comprises the steps:

[0028] Step 1: After cleaning and drying the collected cyanobacteria, place them in 1mol / L lanthanum chloride solution and immerse them for 6 hours, the ratio of cyanobacteria to lanthanum chloride solution is 1g:10mL, filter and dry;

[0029] Step 2: Place the treated cyanobacteria in a tube furnace under the protection of nitrogen, the nitrogen flow rate is 2mL / min, the heating rate is 10°C / min, and pyrolyzes at 600°C for 2h to obtain modified lanthanum chloride Sexual cyanobacteria biochar;

[0030] Step 3: Prepare a 10mg / L potassium dihydrogen phosphate solution, take 0.1g of lanthanum chloride modified cyanobacteria biochar, put it into 50mL of phosphate solution, put it in a rotary mixer, ro...

Embodiment 2

[0033] In the modified biochar of this example, the mass ratio of cyanobacteria to lanthanum chloride is 1:5, and the concentration of lanthanum chloride solution is 2mol / L.

[0034] The preparation method of the modified biochar of the present embodiment comprises the steps:

[0035] Step 1: After cleaning and drying the collected cyanobacteria, place them in 2mol / L lanthanum chloride solution and soak for 12 hours, the ratio of cyanobacteria to lanthanum chloride solution is 1g:10mL, filter and dry;

[0036] Step 2: Place the treated cyanobacteria in a tube furnace under the protection of nitrogen, the nitrogen flow rate is 3mL / min, the heating rate is 8°C / min, and pyrolyzed at 700°C for 1.5h to obtain lanthanum chloride Modified cyanobacteria biochar;

[0037] Step 3: Prepare a 10mg / L phosphate solution, take 0.5g of lanthanum chloride modified cyanobacteria biochar, put it into 50mL of phosphate solution, put it in a rotary mixer, rotate at a speed of 60r / min for 24h, and...

Embodiment 3

[0040] In the modified biochar of this example, the mass ratio of cyanobacteria to lanthanum chloride is 1:3.5, and the concentration of lanthanum chloride solution is 1.5mol / L.

[0041] The preparation method of the modified biochar of the present embodiment comprises the steps:

[0042] Step 1: After cleaning and drying the collected cyanobacteria, place them in a 1.5mol / L lanthanum chloride solution and soak for 2 hours, the ratio of cyanobacteria to lanthanum chloride solution is 1g:10mL, filter and dry;

[0043] Step 2: Place the treated cyanobacteria in a tube furnace under the protection of nitrogen, the nitrogen flow rate is 4mL / min, the heating rate is 5°C / min, and pyrolyzed at 500°C for 1h to obtain modified lanthanum chloride Sexual cyanobacteria biochar;

[0044] Step 3: Prepare 10mg / L phosphate solution, take 1g of lanthanum chloride modified cyanobacteria biochar, put it into 50mL phosphate solution, put it in a rotary mixer, rotate at a speed of 60r / min for 24h...

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Abstract

The invention discloses modified biochar and a preparation method, a use method and a recycling method thereof. The modified biochar is lanthanum chloride modified cyanobacteria biochar, the mass ratio of cyanobacteria to lanthanum chloride is 1: (2.5-5), and the preparation method comprises the following steps: drying cyanobacteria, and adding the dried cyanobacteria into a lanthanum chloride solution for dipping modification; and filtering, drying, pyrolyzing and grinding the cyanobacteria subjected to dipping modification. The invention also provides the recycling method of the modified biochar. The modified biochar has advantages of efficient adsorption, low cost and environmental protection, and the preparation method has characteristics of simple operation, low production cost, environmental protection of raw materials, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a biochar and its preparation method, usage and recycling method, in particular to a modified biochar and its preparation method, usage and recycling method, and belongs to the field of biomass resource utilization. Background technique [0002] With the rapid development of the economy, more and more wastewater is discharged into rivers, lakes and other water bodies, resulting in eutrophication of water bodies. Elements such as carbon (C), nitrogen (N), phosphorus (P), magnesium (Mg) and potassium (K) in water are the causes of eutrophication, among which phosphorus is one of the most important influencing factors. Eutrophication of water bodies can lead to rapid algal blooms in lakes and reservoirs. Cyanobacteria are relatively common species in phytoplankton communities in freshwater lakes. They are more adaptable to environmental and climatic conditions than other algae, and can quickly occupy the upper hand in the communi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/0207B01J20/0288B01J20/20C02F1/281C02F2101/105
Inventor 何欢陈皇博杨绍贵张利民王仁杰马涛张晶华季秋忆武怡洁李时银
Owner NANJING NORMAL UNIVERSITY
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