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Semicoke activated carbon adsorbent, KOH alkali fusion preparation method thereof, and application of semicoke activated carbon adsorbentin removal of tetracycline in water

A technology of activated carbon adsorption and alkali fusion, applied in the direction of adsorption of water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve problems such as high cost and poor regeneration performance, reduce environmental protection costs, and increase total pore volume , Improve the effect of removal rate

Inactive Publication Date: 2020-05-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most commonly used adsorbent is activated carbon particles. Although the treatment effect is good, due to the shortcomings of high cost and poor regeneration performance, it is difficult for various enterprises to bear the huge environmental protection costs, so that it no longer has an advantage in the field of wastewater treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0024] 1) Take a certain amount of raw semi-coke and wash it with deionized water three times. After removing the impurity ash in the raw semi-coke, dry it in a blast drying oven at 105±5℃ to constant weight, and seal it for later use.

[0025] 2) Take KOH and pretreated semi-coke, mix it evenly according to the mass ratio of alkali to carbon 3:1, put it in a porcelain boat, carbonize it in a tubular resistance furnace at 800°C for 3 hours, heat it up at 10°C / min and react Through N in the process 2 (80mL / min). After the carbonization is completed, the obtained semi-coke activated carbon is repeatedly washed with deionized water to neutrality, and dried at a constant temperature of 105±5°C to obtain the semi-coke activated carbon adsorbent.

preparation Embodiment 2-3

[0027] The mass ratio of alkali to carbon was replaced with 1:1 and 2:1, and other conditions were the same as in Example 1.

preparation Embodiment 4-5

[0029] The carbonization temperature was replaced with 700°C and 900°C, and the other conditions were the same as in Example 1.

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PUM

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Abstract

The invention provides a semicoke activated carbon adsorbent, a KOH alkali fusion preparation method thereof, and application of the semicoke activated carbon adsorbent in removal of tetracycline in water. The preparation method comprises the following steps: 1) takingraw material semicoke, washing with water, and drying; and 2) uniformly mixing KOH with the semicoke pretreated in the step 1), carrying out high-temperature carbonization under the protection of inert gas, repeatedly washing obtained semicoke activated carbon with water until the semicoke activated carbon is neutral after the carbonization is completed, and drying to obtain the semicoke activated carbon adsorbent. The semicoke activated carbon adsorbent has a remarkable adsorption effect on tetracycline in a water environment, can better replace activated carbon, reducethe environmental protection cost, and has good economic and environmental effects.

Description

Technical field [0001] The invention belongs to the technical field of purification of tetracyclines in water, and relates to a semi-coke activated carbon adsorbent, a KOH alkali fusion method preparation method thereof, and application in removing tetracyclines from water. Background technique [0002] Antibiotics are a class of antibacterial drugs used to promote the growth and reproduction of animals, treat and prevent diseases. my country is a big country in the use of antibiotics, but humans and animals cannot digest this huge amount of use. 60%-90% of antibiotics will be excreted in feces and urine in the form of their original compounds, and eventually enter the environment and cause pollution. Among them, tetracycline is a derivative of polycyclic naphthacene amide nucleus. It is extremely stable in aqueous solution and dry conditions, but due to its own non-degradability, it stays in the environment and accumulates, resulting in contamination by tetracycline. The water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/38
CPCB01J20/041B01J20/20C02F1/281C02F1/283C02F2101/38
Inventor 王家宏梁林青雷思莉
Owner SHAANXI UNIV OF SCI & TECH
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