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Magnetic biochar adsorbent prepared from sorghum straws as well as preparation method and application thereof

A technology of sorghum straw and biochar, which is applied in the field of resource utilization of agricultural waste and sewage treatment, can solve the problems of low recovery efficiency of biochar adsorbents, poor recycling effect, complicated preparation steps, etc., and achieve high-value resource utilization The effect of utilization, low cost and wide source of raw materials

Pending Publication Date: 2021-11-09
MOUTAI INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional sorghum straw biochar preparation process has the disadvantages of high energy consumption and complicated preparation steps, and the prepared biochar adsorbent has problems such as low recovery efficiency and poor recycling effect

Method used

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  • Magnetic biochar adsorbent prepared from sorghum straws as well as preparation method and application thereof
  • Magnetic biochar adsorbent prepared from sorghum straws as well as preparation method and application thereof
  • Magnetic biochar adsorbent prepared from sorghum straws as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 Shown is the preparation method and application of the sorghum stalk-based magnetic biochar adsorbent in the present invention, and its specific preparation steps:

[0028] 1. Wash the sorghum stalks, dry them at a temperature of 105±2° C. to constant weight, crush them through a 20-100 mesh sieve, and obtain the original samples of sorghum stalks.

[0029] 2. Take 20g of the original sample of sorghum straw obtained in the above steps, place it in a 150mL crucible, put the crucible into a tube furnace, and mix the original sample of sorghum straw, sodium acetate, and ferric chloride in a ratio of 1:2:1. Mix, under the full protection of nitrogen, heat at a heating rate of 20°C / min to the set pyrolysis temperature t, the carbonization temperature is 400-700°C, and the pyrolysis time is 1.0h. After cooling, crush it with a pulverizer for 5 minutes to obtain fine Granular magnetic biomass adsorbent.

[0030] In this example, four pyrolysis temperatures ...

Embodiment 2

[0039] Such as figure 1 Shown is the preparation method and application of the sorghum stalk-based magnetic biochar adsorbent in the present invention, and its specific preparation steps:

[0040] 1. Wash the sorghum stalks, dry them at a temperature of 105±2° C. to constant weight, crush them through a 20-100 mesh sieve, and obtain the original samples of sorghum stalks.

[0041] 2. Take 20g of the original sample of sorghum straw obtained in the above steps, place it in a 150mL crucible, put the crucible into a tube furnace, and mix the original sample of sorghum straw, sodium acetate, and ferric chloride in a ratio of 1:2:1. Mix, under the full protection of nitrogen, heat at a heating rate of 20°C / min to the set temperature of 600°C, pyrolysis and carbonization time t (1.0~3.0h), after cooling, crush with a pulverizer for 5 minutes to obtain fine particles of magnetic raw materials. material adsorbent.

[0042] In this example, three pyrolysis times are set to explore the ...

Embodiment 3

[0050] Such as figure 1 Shown is the preparation method and application of the sorghum stalk-based magnetic biochar adsorbent in the present invention, and its specific preparation steps:

[0051] 1. Wash the sorghum stalks, dry them at a temperature of 105±2° C. to constant weight, crush them through a 20-100 mesh sieve, and obtain the original samples of sorghum stalks.

[0052] 2. Take 20g of the original sample of sorghum straw obtained in the above steps, place it in a 150mL crucible, put the crucible into a tube furnace, and mix the original sample of sorghum straw, sodium acetate, and ferric chloride in a ratio of 1:2:1. Mixing, under the full protection of nitrogen, heating at a heating rate of 20°C / min to the set temperature of 600°C, pyrolysis and carbonization time of 2.0h, after cooling, pulverize with a pulverizer for 5 minutes to obtain a fine-grained magnetic biomass adsorbent.

[0053] 3. Prepare nine 100mL centrifuge tubes, weigh a certain amount of adsorbent...

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Abstract

The invention provides a magnetic biochar adsorbent prepared from sorghum straws as well as a preparation method and application of the magnetic biochar adsorbent. The sorghum straws are used as a raw material, and the sorghum straw-based magnetic biochar adsorbent is finally obtained through the steps of sorghum straw pyrolysis, magnetic loading, mechanical grinding and the like. The prepared adsorbent is applied to treatment of ciprofloxacin-containing sewage, an adsorption experiment is completed within a certain time, and adsorption removal of ciprofloxacin and cyclic utilization of the adsorbent are completed under the action of an external magnetic field. The method has the advantages of rich raw material sources, good adsorbent effect, high cyclic utilization efficiency, easy separation of an adsorption material and a polluted water body and the like, synchronously realizes resource utilization of agricultural wastes and rapid treatment of sewage, and has a certain potential in resource utilization of organic solid wastes and sewage treatment.

Description

technical field [0001] The invention belongs to the fields of resource utilization of agricultural waste and sewage treatment, and in particular relates to a preparation method and application of a magnetic biochar adsorbent prepared from sorghum stalks. Background technique [0002] With the rapid development of modern chemical industry and the continuous improvement of social and economic level, various industries have produced a large amount of pollutant-containing wastewater, especially antibiotics discharged from the pharmaceutical and medical industries, and the amount discharged into water bodies has increased year by year. Among them, ciprofloxacin is a typical antibiotic drug, which has the characteristics of broad antibacterial spectrum, strong activity, and small side effects. It is widely used in the treatment of infectious diseases. Ciprofloxacin in the environment mainly comes from hospitals, pharmaceutical factories, Sewage discharge from farms, etc. Accordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/34C02F101/36C02F101/38
CPCB01J20/20B01J20/0229B01J20/28009C02F1/283B01J2220/4825C02F2101/34C02F2101/36C02F2101/38
Inventor 陶雪熊小燕鲁赟高宇宋福德秦羽周妙琴
Owner MOUTAI INST
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