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Preparation method of multifunctional biochar with heavy metal adsorption and organic matter degradation functions and application thereof

A biochar, multifunctional technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve the problems of difficult recovery and unsatisfactory performance, and achieve rich Active groups, improving the loading effect, and improving the catalytic effect

Pending Publication Date: 2020-07-14
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical scheme absorbs catalytic ions into the pores of activated carbon through the adsorption of activated carbon. The activated carbon obtained by this technical scheme is not in situ generated, and the performance is not ideal.
[0010] In summary, most of the currently prepared biochars are produced by pyrolysis, and most of the prepared biochars are in the form of powder or small particles. They are used in the adsorption of heavy metal pollutants and organic pollutants in water bodies, and recovery is difficult. In addition, the adsorption performance and catalytic performance need to be further improved

Method used

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  • Preparation method of multifunctional biochar with heavy metal adsorption and organic matter degradation functions and application thereof
  • Preparation method of multifunctional biochar with heavy metal adsorption and organic matter degradation functions and application thereof
  • Preparation method of multifunctional biochar with heavy metal adsorption and organic matter degradation functions and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] A method for preparing three-dimensional biochar at low temperature for catalytic degradation of organic pollutants and adsorption of heavy metal pollutants, comprising the following steps:

[0084] Dry the selected plant stalks (tobacco stems);

[0085] The selected tobacco stems are crushed into powder and screened for use;

[0086] Weighing several grams of biomass powder, adding mass fraction to it is 3% cobalt ferrite (based on biomass powder) and mass fraction is 20% HPMC (based on biomass powder) and mixes uniformly;

[0087] Put the above mixture in an open reaction vessel, and add 35% phosphoric acid solution (solid-to-liquid ratio: 1g / 10mL), stir evenly and let it stand for 1h to carry out structural penetration;

[0088] Put it in an oven at 250°C for 10 hours;

[0089] The product is taken out regularly, washed with distilled water until neutral to obtain the finished biochar.

[0090] The prepared three-dimensional structure sample is different from the ...

Embodiment 2

[0101] A method for preparing three-dimensional biochar at low temperature for catalytic degradation of organic pollutants and adsorption of heavy metal pollutants, comprising the following steps:

[0102] The selected fruit peel waste (banana peel);

[0103] The selected banana peels are crushed into powder and screened for use;

[0104] Weigh several grams of biomass powder, add 10% cobalt ferrite (based on biomass powder) and 45% HPMC (based on biomass powder) in mass fraction and mix uniformly in the reaction vessel;

[0105] Add 50% phosphoric acid solution (solid-to-liquid ratio: 1g / 10mL) to the above-mentioned mixture in an open reaction vessel, stir evenly and let stand for 1.5h to carry out structural penetration;

[0106] Put it in an oven at 250°C for 7 hours;

[0107] The product is taken out regularly, washed with distilled water until neutral to obtain the finished biochar.

[0108] application:

[0109] Add the finished biochar into the PMS solution with a c...

Embodiment 3

[0112] A method for preparing three-dimensional biochar at low temperature for catalytic degradation of organic pollutants and adsorption of heavy metal pollutants, comprising the following steps:

[0113] Dry the selected plant stalks (banana peels and tobacco stems);

[0114] The selected banana peels and tobacco stems are dried, crushed into powder and screened for later use;

[0115] Weighing several grams of biomass powder, adding mass fraction to it is 15% cobalt ferrite (based on biomass powder) and 50% HPMC (based on biomass powder) in mass fraction and mixes uniformly in the reaction vessel;

[0116] Add 70% phosphoric acid solution (solid-to-liquid ratio: 1g / 10mL) to the above-mentioned mixture in an open reaction vessel, stir evenly and let stand for 1-2h to carry out structural penetration;

[0117] Put it in an oven at 210°C for 5 hours;

[0118] The product is taken out regularly, washed with distilled water until neutral to obtain the finished biochar.

[011...

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Abstract

The invention belongs to the technical field of heavy metal and organic pollutant wastewater treatment, and provides a preparation method of multifunctional biochar with heavy metal adsorption and organic matter degradation functions and an application thereof. The preparation method comprises the following steps: pyrolyzing a raw material solution of biomass powder, a catalytic metal source, HPMCand acid in an oxygen-containing atmosphere at the temperature of 100-280 DEG C to obtain the multifunctional charcoal. According to the method according to the invention, the method comprises the following steps: carbonizing a raw material aqueous solution containing biomass powder, HPMC, a catalytic metal source and an acid in an oxygen-containing atmosphere (hydrothermal carbonization under non-closed and oxygen-free conditions) in advance; according to the preparation method, the carbonized product which has a three-dimensional structure and relatively large granularity and is modified with rich active groups beneficial to heavy metal adsorption on the surface can be prepared, and catalytic metal ions can be bonded in situ through the active groups and HPMC and are loaded in a formedactivated carbon network. According to the technical scheme, the biochar with multiple functions of heavy metal adsorption and organic pollutant catalysis can be prepared.

Description

Technical field: [0001] The invention belongs to the technical field of heavy metal and organic pollutant wastewater treatment, and specifically discloses a preparation method of multifunctional biochar capable of heavy metal adsorption and organic matter degradation. [0002] technical background: [0003] Biochar is a carbon material rich in organic carbon and minerals with complex structure prepared by pyrolysis of agricultural waste biomass. Biochar can be used as soil improver, remediation of polluted environment, reducing agent, fertilizer slow-release carrier and carbon dioxide sequestration agent, etc. In addition, to a certain extent, biochar can provide solutions to hot issues of global concern such as climate change, environmental pollution, and soil function degradation. [0004] On the one hand, biochar physically adsorbs heavy metals by virtue of its dense porous structure and large specific surface area; on the other hand, biochar chemically adsorbs heavy meta...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/75B01J23/745B01J23/34B01J20/20B01J20/30C02F1/28C02F1/72C02F101/20C02F101/30
CPCB01J23/75B01J23/755B01J23/34B01J23/745B01J20/06B01J20/20C02F1/281C02F1/722C02F1/725C02F2101/20C02F2101/306
Inventor 周南陈欢利周智钟美娥
Owner HUNAN AGRICULTURAL UNIV
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