Preparation method and application of modified charcoal adsorbent

A biochar, adsorbent technology, applied in the fields of biofuels, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of secondary pollution and high production costs, and achieve improved adsorption capacity, low cost, improved adsorption and fixation capacity and The effect of stability

Pending Publication Date: 2022-08-09
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to add a variety of chemical agents or introduce exogenous ions during the generation process, the production cost is high, and it is easy to cause secondary pollution

Method used

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  • Preparation method and application of modified charcoal adsorbent
  • Preparation method and application of modified charcoal adsorbent
  • Preparation method and application of modified charcoal adsorbent

Examples

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preparation example Construction

[0043] The preparation method of a modified biological carbon attachment provided by the present invention includes the following steps:

[0044] S1. Wash, dry, and grind biological charcoal;

[0045] S2, after taking the ball and grinding biochemical, add alkaline solution and heated back; separate liquid separation to obtain alkaline activated activated carbon;

[0046] S3. Put the alkali activated biochand on the temperature control electrical board and place it under ultraviolet light;

[0047] S4, the irradiation end stops heating, cooled to room temperature, and obtained modified biological charcoal. In a preferred embodiment, the biological charcoal used is minerals (coal), plants (branches, leaves, fruits, straws) and organic waste (sludge, algae) as raw materials, and are prepared by low temperature and heat cracking technology; Specific preparation process: Broken the raw materials of biochand carbon, wash the dust with ion water, and dry it at 100 ° C. Then, put the bio...

Embodiment 1

[0062] This embodiment provides a preparation method for modified biological carbon suction agents. The specific process is as follows:

[0063] S1, take 500g coal -made biological charcoal, the proportion of volume L to the mass KG is washed through the unit of ion water. , Place it in a 60 ° C oven, dry 12h;

[0064] Put the dry biological charcoal for 30 minutes on the ball at 300R / min; after 80 destination sieves;

[0065] S2. Take 100 g of the sieved biological charcoal powder, add 5mol / L KOH solution 1L, and return to 4h at 80 ° C, cool to room temperature, wash, remove ion water washing until washing the liquid neutral, 60 ° C oven bake Dry until constant.

[0066] S3. Put the dry biological charcoal in the glass cultivation utensils after drying, and the thickness is about 3mm. Put it vertically under the ultraviolet light and put the glass dish on the temperature control electrical board. The temperature of the electric board is 200 ℃; Keep the distance between the glass ...

Embodiment 2

[0069] This embodiment provides a preparation method for modified biological carbon suction agents. The specific process is as follows:

[0070] S1, take 500g wooden biochand, wash it after the ionic water (after washing the liquid is colorless), place it in a 60 ° C oven, dry 12h, and need to use it; 30 minutes; then 80 destination sieves;

[0071] S2. Take 100g of biological charcoal powder after the sieve, add 5mol / L KOH solution 1L, and return to 4h at 80 ° C, cool to room temperature, filter, remove ion water washing until washing the liquid neutral, 60 ℃ oven, Dry to the constant weight;

[0072] S3. Put the dry biological charcoal in the glass cultivation utensils after drying, and the thickness is about 3mm. Put it vertically under the ultraviolet light and put the glass dish on the temperature control electrical board. The temperature of the electric board is 200 ℃; Keep the distance between the glass and ultraviolet lamps of the glass and ultraviolet light; adjust the st...

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Abstract

The invention relates to a preparation method and application of a modified biochar adsorbent. The preparation method comprises the following steps: S1, washing, drying and ball-milling biochar; s2, taking the biochar after ball milling, adding an alkali solution, and heating and refluxing; carrying out solid-liquid separation, and drying to obtain alkali-activated activated carbon; s3, spreading the alkali-activated charcoal on a temperature-controlled electric heating plate, and irradiating the alkali-activated charcoal under an ultraviolet lamp; s4, stopping heating after irradiation is finished, and cooling to room temperature to obtain the modified biochar. According to the modified biochar prepared through the method, the specific surface area and the number of oxygen-containing groups are remarkably higher than those of unmodified biochar, active sites for adsorbing heavy metal are improved, the leaching concentration of heavy metal in soil can be reduced, environment acceptability is achieved, and the preparation method is easy to operate, low in cost, free of secondary pollution and suitable for industrial production. Wide application prospects are realized.

Description

Technical field [0001] The present invention involves the preparation method and application of a modified biological carbon attachment, which is a technical field of environmental protection governance. Background technique [0002] With the rapid development of industrialization and urbanization, the problem of soil heavy metal pollution has also become increasingly serious. A large number of heavy metals accumulated in the soil are mainly caused by human activities, such as mining, wastewater and pesticides. Many studies have shown that soil heavy metal pollution has the characteristics of concealment, long -term and irreversible, and can directly or indirectly affect groundwater, air, crops and creatures, and even threatening human health. Therefore, the repair of soil heavy metals has also become an important research direction. [0003] Biological charcoal has a richer gap structure and a large ratio area. Bioskin is a type of solid matter, stability, high aromatherapy, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B09C1/08
CPCB01J20/20B01J20/28064B01J20/28095B09C1/08B01J2220/4825B01J2220/4875Y02E50/10
Inventor 罗培韦黎华王宏胡清
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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