Preparation method of rice straw modified charcoal for removing tetracycline in water body

A technology of rice straw and biochar, which is applied in water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of small adsorption capacity and difficult recovery, and achieves changes in surface polarity, rich resources, and increased The effect of specific surface area

Inactive Publication Date: 2020-10-09
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of undisturbed straw biochar is small and recovery is difficult, so it must be modified to improve the adsorption capacity of antibiotics in water.

Method used

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  • Preparation method of rice straw modified charcoal for removing tetracycline in water body
  • Preparation method of rice straw modified charcoal for removing tetracycline in water body
  • Preparation method of rice straw modified charcoal for removing tetracycline in water body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A kind of preparation operation steps of rice straw modified biochar that removes tetracycline in water is as follows:

[0050] (1) Pretreatment

[0051] The rice stalks were washed with water to remove the ash on the surface, and then dried in a blast dryer at a temperature of 105°C. After drying, the rice stalks were cut into 3 cm long small stalks with scissors, and then the small stalks were crushed with a pulverizer and passed through a 30-mesh sieve to obtain rice straw powder.

[0052] (2) Dipping treatment

[0053] 3 grams of rice straw powder, 27 grams of ferric chloride and 6 grams of urea were thoroughly mixed in 100 mL of pure water, stirred magnetically for 4 hours, and then the mixed solids were dried in a blast drying oven at a drying temperature of 105 °C. Drying time was 24 h to give mixed solids.

[0054] (3) Carbonization treatment

[0055] Put the mixed solid into a quartz boat, transfer it to a tubular muffle furnace, and perform pyrolysis under...

Embodiment 2

[0061] A kind of preparation operation steps of rice straw modified biochar that removes tetracycline in water is as follows:

[0062] (1) Pretreatment

[0063] The rice stalks were washed with water to remove the ash on the surface, and then dried in a blast dryer at a temperature of 105°C. After drying, the rice straw was cut into 5 cm long small stalks with scissors, and then the small stalks were crushed with a pulverizer and passed through a 40-mesh sieve to obtain rice straw powder.

[0064] (2) Dipping treatment

[0065] 5 grams of rice straw powder, 27 grams of ferric chloride and 6 grams of urea were fully mixed in 150 mL of pure water, stirred magnetically for 3 hours, and then the mixed solids were dried in a blast drying oven at a drying temperature of 90 °C. Drying time was 24 h to give mixed solids.

[0066] (3) Carbonization treatment

[0067] Put the mixed solid into a quartz boat, transfer it to a tubular muffle furnace, and perform pyrolysis under a nitro...

Embodiment 3

[0072] Application of Rice Straw Modified Biochar

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Abstract

The invention discloses a preparation method of rice straw modified charcoal for removing tetracycline in a water body, and belongs to the technical field of resource recycling of product processing wastes. The preparation method comprises the following steps of: washing, drying and crushing rice straws; fully and uniformly mixing the crushed rice straws with ferric chloride and urea in an aqueoussolution; drying a mixture, pyrolyzing the dried mixture in a tubular muffle furnace; washing, drying and ball-milling a pyrolyzed carbonized product to obtain rice straw modified charcoal. The specific surface area of the prepared rice straw modified charcoal is 512-606 m<2> / g; and the pore volume of the prepared rice straw modified charcoal is 0.1328-0.1537 cm<3> / g. When the concentration of the tetracycline in the water body is initially within the range of 0-100 mg / L, the removal rate of the tetracycline in the water body by the rice straw modified charcoal exceeds 95%; and the rice strawmodified charcoal has magnetism and is easy to recover.

Description

technical field [0001] The invention belongs to the field of resource recycling of product processing waste, and in particular relates to a preparation method of rice straw modified biochar for removing tetracycline in water. Background technique [0002] According to statistics, China's annual production of antibiotics is about 210,000 tons, most of which are used in medicine and livestock and poultry breeding industries. After antibiotics are taken into the body, they are difficult to be absorbed by the digestive system. Most antibiotics are excreted in the form of prototypes or metabolites into the soil or water, resulting in environmental pollution. The main sources of antibiotics in the aquatic environment include sewage treatment plant wastewater, chemical manufacturing wastewater, animal husbandry and aquaculture. Tetracycline is one of the most widely detected antibiotics in the environment. If it is not controlled, it will enrich and accumulate in organisms through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/38C02F101/34
CPCB01J20/06B01J20/20B01J20/28009B01J2220/4825C02F1/283C02F2101/34C02F2101/38
Inventor 范世锁梅杨璐李斌王毅王振唐俊
Owner ANHUI AGRICULTURAL UNIVERSITY
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