Method for removing sulfamethoxazole from water through adsorption of KOH-activated coal-based active carbon

A technology of sulfamethoxazole and coal-based activated carbon, applied in chemical instruments and methods, adsorption water/sewage treatment, inorganic chemistry, etc., to achieve fast adsorption rate, significant treatment effect, and low cost

Inactive Publication Date: 2013-02-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Using it as an adsorbent to remove sulfamet...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix 1g of anthracite powder with 5g of KOH evenly and place in a nickel boat. Place the nickel boat in a horizontal tube furnace, raise the temperature to 800°C at 5°C / min under nitrogen protection (20mL / min), and keep it for 2h. After the tube furnace dropped to room temperature, stop feeding nitrogen. The obtained material was washed with deionized water to remove KOH until neutral. Dry at 70°C and store in a dark place. The KOH-activated coal-based activated carbon prepared by the above steps has a pore diameter of about 2nm and a pore volume of about 1.22cm 3 / g, specific surface area 2514 is m 2 / g.

[0023] The prepared coal-based activated carbon is used as an adsorbent to adsorb sulfamethoxazole in water. Adsorption was carried out in a closed container with constant temperature oscillation at 25°C. The initial concentration of sulfamethoxazole is 27~120mg / L, the mass ratio of adsorbent to slightly polluted water containing sulfamethoxazole is 1:4000, the ...

Embodiment 2

[0026] With embodiment 1, the initial concentration of sulfamethoxazole is 37mg / L, and the mass ratio of adsorbent and slightly polluted water is 1:25000, and other conditions are constant, and the adsorption capacity of recording sulfamethoxazole is 751.41mg / g, The removal rate is 79.18%, and the time required to reach this removal rate is 305 minutes.

[0027]

Embodiment 3

[0029] Same as Example 2, other conditions are constant, the adsorption time is 20min, the adsorption amount of sulfamethoxazole recorded is 570.8737mg / g, and the removal rate is 60.00%.

[0030]

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Abstract

The invention discloses a method for removing sulfamethoxazole out of water through adsorption of KOH-activated coal-based active carbon. The method comprises the following steps of preparing KOH-activated coal-based active carbon by taking KOH as an activating agent and anthracite as a carbon source, putting an adsorbing agent into water containing sulfamethoxazole, and adsorbing and removing sulfamethoxazole in the water. According to the method disclosed by the invention, the adsorption performance of the KOH-activated coal-based active carbon serving as an activating agent is remarkably better than that of commercial active carbon, and the KOH-activated coal-based active carbon is used for removing the sulfamethoxazole from the micropolluted water; the adsorption capacity is large, the adsorption speed is high, the treatment effect is remarkable, and the economical and environmental benefits are excellent.

Description

technical field [0001] The invention belongs to the technical scope of water treatment and relates to a method for removing trace antibiotics in water, in particular to a method for removing sulfamethoxazole from water by using KOH-activated coal-based activated carbon to absorb and remove sulfamethoxazole. Background technique [0002] Due to the rapid development of medical treatment and animal husbandry, antibiotics are widely used in humans and farmed animals. At present, the annual output of antibiotics in my country is 147,000 tons, and the annual consumption is more than 100,000 tons. These antibiotics are incompletely absorbed by humans and animals, enter natural water bodies in the form of medical wastewater or domestic wastewater, and are reabsorbed by the human body, causing serious health risks to the human body. At the same time, it may also cause drug resistance of microorganisms in water and affect ecological security. [0003] Sulfamethoxazole (SMX) is a br...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/58C01B31/12B01J20/20B01J20/30C02F101/38C01B32/33C01B32/348
Inventor 朱东强左林子
Owner NANJING UNIV
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