Lanthanum-modified biochar, and preparation method and application thereof

A biochar, modified technology, applied in the preparation/purification of carbon, chemical instruments and methods, water pollutants, etc., can solve the adsorption effect (the adsorption capacity is not particularly ideal, etc.

Inactive Publication Date: 2020-08-28
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption effect (adsorption capacity) of phospho

Method used

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  • Lanthanum-modified biochar, and preparation method and application thereof
  • Lanthanum-modified biochar, and preparation method and application thereof
  • Lanthanum-modified biochar, and preparation method and application thereof

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preparation example Construction

[0033] The invention provides a kind of preparation method of lanthanum modified biochar, comprising the following steps:

[0034] Pyrolyzing sheep manure to obtain sheep manure biochar;

[0035] After the sheep dung biochar is washed, it is soaked in a lanthanum chloride solution, and the pH value is adjusted to 8-11 to obtain the lanthanum-modified biochar.

[0036] In the invention, sheep manure is pyrolyzed to obtain sheep manure biochar.

[0037] The present invention does not have any special limitation on the source of the sheep manure, and the sources well known to those skilled in the art can be used.

[0038] Before the pyrolysis, the present invention preferably sieves the sheep manure; the present invention does not have any special limitation on the sieving, and adopts a process well known to those skilled in the art to ensure that the sieved sheep manure The particle size can be below 840 microns.

[0039] In the present invention, the pyrolysis temperature is...

Embodiment 1

[0063] Pass sheep manure through a 20-mesh sieve, and place it in a crucible for pyrolysis (500°C, 2h) to obtain sheep manure biochar (referred to as BC-500);

[0064] Grind the sheep dung biochar and pass it through a 60-mesh sieve, mix 10 g of the sieved sheep dung biochar with 500 mL of hydrochloric acid with a concentration of 1 mol / L, stir evenly, let stand for 30 minutes, and pass through a 0.45 μm microporous membrane Carry out suction filtration, repeat the above process of mixing, stirring, standing and suction filtration 3 times, mix with 1000mL deionized water (resistivity 18.2MΩ·cm), stir well, let stand for 30min, pass through 0.45μm microporous filter After the membrane is suction-filtered, it is dried (105° C.) to constant weight to obtain sheep manure biochar after charcoal washing;

[0065] Mix the sheep dung biochar after the charcoal washing treatment with 500mL of lanthanum chloride solution with a concentration of 0.5mol / L, stir evenly and let stand for 30...

Embodiment 2

[0067] Pass sheep manure through a 20-mesh sieve, and place it in a crucible for pyrolysis (400°C, 2h) to obtain sheep manure biochar (referred to as BC-400);

[0068] Grind the sheep dung biochar and pass it through a 60-mesh sieve, mix 10 g of the sieved sheep dung biochar with 500 mL of hydrochloric acid with a concentration of 1 mol / L, stir evenly, let stand for 30 minutes, and pass through a 0.45 μm microporous membrane Carry out suction filtration, repeat the above process of mixing, stirring, standing and suction filtration 3 times, mix with 1000mL deionized water (resistivity 18.2MΩ·cm), stir well, let stand for 30min, pass through 0.45μm microporous filter After the membrane is suction-filtered, it is dried (105° C.) to constant weight to obtain sheep manure biochar after charcoal washing;

[0069] Mix the sheep dung biochar after the charcoal washing treatment with 500mL of lanthanum chloride solution with a concentration of 0.5mol / L, stir evenly and let stand for 30...

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Abstract

The invention relates to the technical field of biochar, and especially relates to a lanthanum modified biochar, and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: pyrolyzing sheep manure to obtain sheep manure biochar; and washing the sheep manure biochar, dipping the washed sheep manure biochar in a lanthanum chloridesolution, and adjusting the pH value to 8-11 to obtain the lanthanum modified biochar. According to the record of the embodiment, the adsorption capacity of the lanthanum-modified biochar prepared bythe preparation method in the technical scheme on phosphate can reach 58.33 mg/g at most.

Description

technical field [0001] The invention relates to the technical field of biochar, in particular to a lanthanum-modified biochar and its preparation method and application. Background technique [0002] Eutrophication is one of the most common causes of damage to inland and marine water quality. The most significant impact of water eutrophication is the deterioration of water hypoxia, which will cause a large number of aquatic organisms to die, and will affect human health. Water eutrophication is common in many lakes and oceans, and the diffuse pollution of nitrogen and phosphorus has become its main driving force. According to Liebig's minimum factor law, phosphorus is considered to be the most important driving force leading to water eutrophication. Therefore, how to remove phosphorus economically and efficiently is of great significance to control water eutrophication. At present, the main methods of phosphorus removal in water include: chemical precipitation, biological ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C01B32/05C02F101/10
CPCB01J20/20C01B32/05C02F1/283C02F2101/105
Inventor 王风冯弋洋张克强罗元
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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