Corn stalk biochar, method for removing sulfonamide antibiotics in water by using corn stalk biochar and application of corn stalk biochar

A corn stalk and biochar technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of inability to achieve adsorption effect, difference in adsorption performance, human health hazards, etc., and achieve resource utilization, Low ash content, the effect of solving environmental problems

Inactive Publication Date: 2016-10-26
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most sulfa antibiotics cannot be completely absorbed by organisms, sulfa antibiotics will be added to the soil and water environment in the form of parent or metabolites, thereby polluting the ecological environment, causing drug-resistant bacteria to be induced in the existing environment, and harmful to human health. potentially harmful
[0003] At present, there have been reports on the use of straw charcoal as an adsorbent for sulfapyridine and sulfamethoxazole, but different preparation methods of straw charcoal will lead to large differences in adsorption performance, and its adsorption to substrates is also selective. Charcoal cannot achieve good adsorption effect

Method used

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  • Corn stalk biochar, method for removing sulfonamide antibiotics in water by using corn stalk biochar and application of corn stalk biochar
  • Corn stalk biochar, method for removing sulfonamide antibiotics in water by using corn stalk biochar and application of corn stalk biochar
  • Corn stalk biochar, method for removing sulfonamide antibiotics in water by using corn stalk biochar and application of corn stalk biochar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of corn stalk biochar, it is prepared through the following steps:

[0040] 1) Wash the corn stalks, air-dry them for 2 days, put them in an oven at 60°C for 12 hours, and then use a grinder to crush them to below 2 cm;

[0041] 2) Wrap the minced corn stalks with tin foil and place them in a porcelain crucible, cover the lid and put it into a tube-type atmosphere furnace, turn on N 2 , using temperature programming and raising the temperature to the target temperature of 700°C at a rate of 10°C / min, and then maintaining it for 3h;

[0042] 3) After naturally cooling to room temperature in the furnace, take it out and grind it with a mortar and pass through a 60-mesh sieve;

[0043] 4) Treat the sieved product with 1mol / L HCl for 4 hours, filter it with suction, wash with distilled water until the lotion is neutral, put it in an oven at 80°C for 24 hours, cool to room temperature and pass through a 100-mesh sieve to obtain the final product corn straw biochar. ...

Embodiment 2

[0046] The corn stalk biochar obtained in Example 1 was used as an adsorbent to treat slightly polluted water containing sulfadiazine, and an adsorption experiment was carried out in a 100 mL stoppered glass bottle. Among them, the mass ratio of corn stalk biochar to sulfadiazine-containing aqueous solution is 1:100, the adsorption temperature is 25±2°C, the initial concentration of sulfadiazine is 1-20mg / L, the adsorption time is 3h, and the solution after adsorption equilibrium The pH value is about 5.60, and the treatment results are shown in Table 1.

Embodiment 3

[0048] The corn stalk biochar obtained in Example 1 was used as an adsorbent to treat the slightly polluted water containing sulfachloropyridazine, and an adsorption experiment was carried out in a 100 mL stoppered glass bottle. Among them, the mass ratio of corn stalk biochar to the aqueous solution containing sulfachloropyridazine was 1:200, the adsorption temperature was 25±2°C, the initial concentration of sulfachloropyridazine was 1-20mg / L, and the adsorption time was 3h. The pH value of the solution after adsorption equilibrium is about 5.20, and the treatment results are shown in Table 1.

[0049] Table 1 Summary table of corn straw biochar treatment results.

[0050] Pollutants

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Abstract

The invention relates to corn stalk biochar, a method for removing sulfonamide antibiotics in water by using the corn stalk biochar and application of the corn stalk biochar. The corn stalk biochar is prepared by the following steps: firstly, drying and crushing; secondly, putting into a tubular atmosphere furnace, heating by adopting programs, and performing oxygen-free carbonization under the condition of 500 to 700DEG C for 120 to 180 minutes; thirdly, cooling in the furnace to room temperature, and grinding charcoal ash; fourthly, soaking with hydrochloric acid, filtering, washing, drying to constant weight, and sieving. The corn stalk biochar serving as an adsorbent is put into a water body containing the sulfonamide antibiotics for adsorbing to remove the sulfonamide antibiotics, so that the difficult problem that antibiotics in water are difficult to remove is solved. Meanwhile, the environment problem brought by straw burning is solved, wastes are changed into the valuables, the recycling of corn stalks is realized, and better economic benefits and social benefits are obtained.

Description

technical field [0001] The invention relates to corn stalk biochar and its method and application for removing sulfonamide antibiotics in water, belonging to the technical field of water treatment. Background technique [0002] Sulfa antibiotics are synthetic antibiotics and are broad-spectrum antibiotics. It has inhibitory effect on most Gram-positive and Gram-negative bacteria, and is widely used in medicine and animal husbandry. It has the characteristics of broad antibacterial spectrum and strong curative effect, so it is widely used in the prevention and treatment of various bacterial infection diseases in humans, livestock and poultry and aquaculture. Many studies at home and abroad have found that the detection frequency of sulfonamide antibiotics in natural water bodies such as surface water and groundwater is relatively high, such as sulfadiazine and sulfachloropyridazine. Since most sulfonamide antibiotics cannot be completely absorbed by organisms, sulfonamide a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/38
CPCB01J20/20C02F1/283C02F2101/38C02F2101/40
Inventor 丘锦荣赵涛卢文洲雷育涛易皓林晓君曾经文
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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