Preparation method of biomass charcoal material for removing phosphorus from sewage

A technology of biochar and sewage, which is applied in the direction of water pollutants, water/sewage treatment, chemical instruments and methods, etc. It can solve the problems of general adsorption performance, insufficient surface functional groups, and non-specificity of adsorbate adsorption. Achieve good adsorption capacity and good phosphorus adsorption specificity

Pending Publication Date: 2022-01-11
兰溪市欧翔新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the biochar material used as an adsorbent often has the defects of not having abundant surface functional groups, not having specificity for adsorbate adsorption, and general adsorption performance.

Method used

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  • Preparation method of biomass charcoal material for removing phosphorus from sewage
  • Preparation method of biomass charcoal material for removing phosphorus from sewage
  • Preparation method of biomass charcoal material for removing phosphorus from sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for preparing a biochar material for phosphorus removal from sewage, specifically comprising the following steps:

[0017] S1: Collect reed straw, the raw material of biochar, and dry it in the sun, then soak it in an aqueous sodium hydroxide solution with a molar concentration of 5 mol / L for 6 hours, filter, wash with distilled water until neutral, and heat and dry at 80°C , crushed into particles with a particle size of 4mm, and set aside.

[0018] S2: Add lanthanum nitrate to distilled water, ultrasonically dissolve, then add the particles in step S1 to the solution, stir for 3 hours, move it to a high-pressure reactor, react at 120°C for 2 hours, cool, filter, placed in a tube furnace, and calcined at 600° C. for 2 h in an atmosphere of a nitrogen-hydrogen gas mixture with a content ratio of 90%:10%, to obtain a biochar precursor.

[0019] S3: Add the biochar precursor to distilled water, then add dopamine, add Tris-HCl buffer solution during stirring, sti...

Embodiment 2

[0021] A method for preparing a biochar material for phosphorus removal from sewage, specifically comprising the following steps:

[0022] S1: Collect rice straw as a raw material for biochar and dry it in the sun, then soak it in an aqueous sodium hydroxide solution with a molar concentration of 8 mol / L for 8 hours, filter, wash with distilled water until neutral, and heat and dry at 95°C , crushed into particles with a particle size of 6mm, and set aside.

[0023] S2: Add lanthanum chloride to distilled water, ultrasonically dissolve, then add the particles in step S1 to the solution, stir for 6 hours, move it to a high-pressure reactor, react at 130°C for 3 hours, cool, and filter , placed in a tube furnace, and calcined at 750° C. for 4 hours in an atmosphere of a nitrogen-hydrogen gas mixture with a content ratio of 90%:10%, to obtain a biochar precursor.

[0024] S3: Add the biochar precursor to distilled water, then add dopamine, add Tris-HCl buffer solution during the...

Embodiment 3

[0026] A method for preparing a biochar material for phosphorus removal from sewage, specifically comprising the following steps:

[0027] S1: Collect kelp as a raw material for biochar and dry it in the sun, then soak it in an aqueous sodium hydroxide solution with a molar concentration of 6 mol / L for 7 hours, filter, wash with distilled water until neutral, and heat and dry at 85°C. Crush into particles with a particle size of 5 mm and set aside.

[0028] S2: Add lanthanum sulfate to distilled water, ultrasonically dissolve, then add the particles in step S1 to the solution, stir for 4 hours, move it to a high-pressure reactor, react at 125°C for 2.5 hours, cool, and filter , placed in a tube furnace, and calcined at 650° C. for 3 h in a mixed gas atmosphere of nitrogen and hydrogen with a content ratio of 90%:10%, to obtain a biochar precursor.

[0029] S3: Add the biochar precursor to distilled water, then add dopamine, add Tris-HCl buffer solution during stirring, stir f...

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PUM

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Abstract

The invention discloses a preparation method of a biomass charcoal material for removing phosphorus from sewage, which comprises the following steps of: collecting and drying a biomass charcoal raw material in the sun, soaking the biomass charcoal raw material in a sodium hydroxide aqueous solution for 6-8 hours, filtering, washing the raw material with distilled water until the raw material is neutral, heating and drying the raw material at 80-95 DEG C, and crushing the raw material into particles with the particle size of 4-6 mm for later use; adding lanthanum salt into distilled water, carrying out ultrasonic dissolution, then adding the particles in the step S1 into the solution, stirring for 3-6 hours, then transferring the solution into a high-pressure reaction kettle, carrying out high-pressure reaction at 120-130 DEG C for 2-3 hours, cooling, filtering, putting the reaction product into a tubular furnace, and calcining the reaction product for 2-4 hours at 600-750 DEG C in the atmosphere of nitrogen and hydrogen mixed gas with the content ratio of 90%: 10% to obtain a biomass charcoal precursor; and adding the biomass charcoal precursor into distilled water, then adding dopamine, adding a Tris-HCl buffer solution in the stirring process, stirring for 6-10 hours, then adding lanthanum salt, continuing to stir for 4-6 hours, filtering, and drying at 70-75 DEG C for 3-5 hours to obtain the biomass charcoal.

Description

technical field [0001] The invention belongs to the technical field of biomass materials, and in particular relates to a method for preparing a biomass carbon material for phosphorus removal from sewage. Background technique [0002] In recent years, with the continuous improvement of people's quality of life, the natural environment has become worse and worse. Large-scale algal blooms and red tides have broken out in most waters in my country, including reservoirs, lakes, and coastal waters, resulting in the dissolved oxygen content of water bodies decline, water quality deterioration, and then destroy the ecological balance of the water body. The reason for the eutrophication of the water body is that a large amount of phosphorus-containing wastewater is directly discharged into the water body without treatment or incomplete treatment, so that the phosphorus content in the water body far exceeds the discharge standard, resulting in water body pollution. Eutrophication occurs...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/10C02F101/30
CPCB01J20/24B01J20/20B01J20/0207B01J20/22C02F1/281C02F1/285C02F1/286B01J2220/4825C02F2101/105C02F2101/30
Inventor 高瑞军
Owner 兰溪市欧翔新材料有限公司
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