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Preparation method for magnetic biological carbon by one-step synthesis

A biochar, magnetic technology, applied in the directions of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of high cost, cumbersome process, etc., and achieve remarkable effect, simplified process and convenient preparation. simple craftsmanship

Inactive Publication Date: 2016-05-04
HUAZHONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the cumbersome and relatively high cost of the current two-step synthesis of magnetic biochar, the pyrolysis carbonization process and the magnetization process are combined to synthesize magnetic biochar in one step.

Method used

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  • Preparation method for magnetic biological carbon by one-step synthesis
  • Preparation method for magnetic biological carbon by one-step synthesis
  • Preparation method for magnetic biological carbon by one-step synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The biomass raw material is air-dried under natural conditions and stored for later use. The biomass raw material is crushed into a length of about 2 cm, and the dried and crushed biomass raw material is added to the 2+ and Fe 3+ In the iron salt solution, in the iron salt solution, Fe 2+ The molar concentration of Fe is 0.4mol / L, Fe 3+ The molar concentration of the mixture is 0.04mol / L, and the mixed solution is obtained after adding the biomass raw material into the iron salt solution, and the weight percentage of the biomass raw material in the mixed solution is 0.03%.

[0027] Iron salt solution is formed by mixing divalent iron salt solution and ferric salt solution,

[0028] The ferrous salt solution is obtained by adding FeSO 4 Soluble in deionized water.

[0029] The ferric salt solution is obtained in the following way: Fe 2 (SO 4 ) 3 -nH 2 O is dissolved in deionized water.

[0030] The ferrous salt solution and the ferric salt solution are mixed to ...

Embodiment 2

[0036] After the biomass raw material is air-dried under natural conditions, it is stored for later use. The biomass raw material is crushed into a length of about 4 cm, and the dried and crushed biomass raw material is added to the 2+ and Fe 3+ In the iron salt solution, in the iron salt solution, Fe 2+ The molar concentration of Fe is 0.6mol / L, Fe 3+ The molar concentration is 0.06mol / L, and the mixed solution is obtained after adding the biomass raw material into the iron salt solution, and the weight percentage of the biomass raw material in the mixed solution is 0.05%.

[0037] Iron salt solution is formed by mixing divalent iron salt solution and ferric salt solution,

[0038] The ferrous salt solution is obtained by adding FeSO 4 Soluble in deionized water.

[0039] The ferric salt solution is obtained in the following way: Fe 2 (SO 4 ) 3 -nH 2 O is dissolved in deionized water.

[0040] The ferrous salt solution and the ferric salt solution are mixed to obtain...

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Abstract

The invention discloses a preparation method for magnetic biological carbon by one-step synthesis. The preparation method comprises the following steps: air-drying a biomass raw material under a natural condition and then storing for later use, and adding a dried and crushed biomass raw material into a ferric salt solution; slowly stirring a mixed solution, then, regulating a pH (potential of hydrogen) value with an NaOH solution, then, continuously stirring, then, standing until the biomass raw material absorbs the ferric salt solution to reach a saturation state, performing suction filtration to remove free water in the biomass raw material, pyrolyzing a suction filtration-treated biomass raw material in a pyrolyzing furnace to make carbon, and introducing an inert shielding gas into the pyrolyzing furnace to obtain the magnetic biological carbon. According to the preparation method disclosed by the invention, carbonization and magnetization are combined together to synthetize the magnetic biological carbon by one-step pyrolysis; meanwhile, different magnetic biological carbon materials can be obtained by changing the shielding gas (nitrogen or carbon dioxide); an effect of removing typical heavy metal pollutants in a water body is obvious, and moreover, the typical heavy metal pollutants can be separated and recovered from the water body as well so as to protect the environment from secondary pollution.

Description

technical field [0001] The invention relates to the field of heavy metal pollution control. Specifically relates to a preparation method for synthesizing magnetic biochar in one step. It is suitable for the secondary utilization of agricultural waste resources. Background technique [0002] Due to the discharge of a large amount of heavy metal-containing sewage in industrial activities such as mineral mining and smelting, water and soil environmental pollution is becoming more and more serious, which greatly threatens human health. Therefore, the effective restoration of heavy metal-polluted water bodies has become the focus of pollution prevention and control in my country. As a new type of environmental functional material, biochar has attracted widespread attention. Biochar has a wide range of raw materials, and has a large porosity and specific surface area, a highly aromatic structure, and contains a large number of phenolic hydroxyl groups, carboxyl groups, and carbon...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/20B01J20/28009B01J2220/4875C02F1/281C02F1/283Y02C20/40
Inventor 谭中欣王远航黄传琴
Owner HUAZHONG AGRICULTURAL UNIVERSITY
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