Biochar adsorbent with carbon defect site structure, and preparation method and application of biochar adsorbent

A biochar and adsorbent technology, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve the problems of non-selective adsorption, etc., reduce environmental burden, low cost, improve disorder degree of effect

Pending Publication Date: 2021-12-14
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when carbon materials are used as adsorbents, they do not have the ability to selectively adsorb Re (VII) in waste liquid due to their own physical and chemical properties.

Method used

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  • Biochar adsorbent with carbon defect site structure, and preparation method and application of biochar adsorbent
  • Biochar adsorbent with carbon defect site structure, and preparation method and application of biochar adsorbent

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Embodiment 1

[0024] Carbon adsorbent having a biological preparation and its application position carbon defect structure, comprising the steps of:

[0025] (1) Granulation: The washed, dried bamboo shell crushed through a 60 mesh sieve;

[0026] (2) pre-: Apply sifted bamboo shell, placed in a muffle furnace at 500 ° C preform 4 h, cooled to room temperature, taken out, washed to neutrality, dried, to obtain biocoke bamboo shell;

[0027] (3) Transformation: Take 0.2 g Hock biochar and 0.6 g CH 3 COOK in the mortar, mixed homogeneously ground, placed in a tube furnace temperature program, into N 2 A flow rate of 60 mL / min, conversion 2 h at 700 ° C. ;

[0028] After the conversion of biochar beaker 20mL beaker was added to a concentration of 2moL / L HCl, the beaker was placed in a water bath oscillator at a temperature of 25 ° C, shaking speed of 120rpm shaking 20min under conditions: (4) was purified removed by filtration, and washed with deionized water until the filtrate is neutral.

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Abstract

The invention belongs to the field of carbon materials, and particularly relates to a preparation method and application of a biochar adsorbent with a carbon defect site structure. The preparation method comprises the following steps: (1) granulating: crushing and sieving cleaned and dried bamboo shoot shells for later use; (2) prefabricating: taking a proper amount of the bamboo shoot shells, and preprocessing the bamboo shoot shells under a limited oxygen condition; (3) converting: adding the carbonized bamboo shoot shell charcoal and a converting agent into a mortar according to a certain mass ratio, mixing, uniformly grinding, and carrying out high-temperature conversion under the protection of inert gas; and (4) refining: cooling the biochar subjected to high-temperature conversion to room temperature, refining and filtering the biochar with a refining solution, and washing the biochar with deionized water until the filtrate is neutral to prepare the biochar material with a carbon defect site structure, which can be used for adsorbing and recovering metal rhenium in acidic waste liquid.

Description

technical field [0001] The invention belongs to the field of carbon materials, and in particular relates to a preparation method and application of a biochar adsorbent with a carbon defect site structure. Background technique [0002] Rhenium is a rare metal with the characteristics of corrosion resistance, high temperature resistance, high hardness and good catalytic performance. It is widely used in the fields of national defense, aerospace, aviation and catalysis. However, rhenium reserves are limited and resources are scarce. The average content of rhenium in the earth's crust is only ppb level, and no single rhenium-containing ore that can be directly mined by industry has been detected. Trace amounts of rhenium are often associated with molybdenite and porphyry copper ore. Rhenium has become one of the important strategic resources in my country. However, rhenium resources in my country are scarce, and the demand for rhenium in the rapid development of national defense...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/20C02F1/283C02F2101/10B01J2220/4887
Inventor 胡晖吕晨光汪湉张佳源
Owner FUZHOU UNIV
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