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Method for removing acetaminophen in water based on in-situ Fenton reaction

A technology of acetaminophen and Fenton reaction, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as increased process complexity, secondary pollution of water body, increased removal cost, etc., to achieve Avoid secondary chemical pollution and eliminate damage effects

Active Publication Date: 2020-08-25
湖北省水利水电科学研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Finally, in order to improve the chemical removal efficiency, it is necessary to add additional oxidizing substances such as hydrogen peroxide and ozone, but the addition of oxidizing agents will not only increase the complexity of the process, but also increase the cost of removal. Excessive oxidizing agents will also cause secondary pollution of water bodies

Method used

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  • Method for removing acetaminophen in water based on in-situ Fenton reaction
  • Method for removing acetaminophen in water based on in-situ Fenton reaction
  • Method for removing acetaminophen in water based on in-situ Fenton reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Iron-doped graphitic carbon nitride (Fe / g-C 3 N 4 ) preparation

[0029] Add 3 g of melamine (C 3 h 6 N 6 ) powder, add 3.2, 6.4, 12.8, 32, 44.8, 64mg ferric chloride hexahydrate (FeCl 3 ·6H 2 O), then add 100mL H 2 O and 5mL concentrated hydrochloric acid, stirred and evaporated to dryness at 100°C to obtain the precursor, heated to 550°C at a rate of 5°C / min in a muffle furnace, then kept at temperature for 3 hours, cooled to room temperature, and obtained different iron content of 0.05% , 0.1%, 0.2%, 0.5%, 0.7%, 1.0% Fe / g-C 3 N 4 , the obtained product was ultrasonically washed three times with 100 mL deionized water and 100 mL ethanol respectively, and the product was put into an oven and dried at 80° C. for 12 hours.

[0030] 2. Paracetamol removal experiment

[0031] Add 100 mL of acetaminophen aqueous solution containing 50 μM to a 250 mL three-necked flask, and then add 100 mg (1.0 g / L) of g-C prepared above containing 0.7% Fe. 3 N 4, and then tur...

Embodiment 2

[0033] In a 250mL three-necked flask, add 100mL of acetaminophen aqueous solution containing 50 μM, and then add 100mg (1.0g / L) of g-C prepared in Example 1 containing different contents of Fe. 3 N 4 , and then turn on the ultrasound (300W) to start the reaction under the condition that the oxygen content is 7.8mg / L, take a sample every 15min, centrifuge the sample for 10 minutes under the condition of 3000rpm, and measure the content of acetaminophen in the supernatant under optimized conditions concentration. After 60 minutes of reaction, acetaminophen was mixed with 0.0%, 0.05%, 0.1%, 0.2%, 0.5% and 1% Fe / g-C 3 N 4 The degradation rate in is followed by: 48%, 58%, 71%, 88%, 92% and 92% ( Figure 4 ).

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Abstract

The invention discloses a method for removing acetaminophen in water based on an in-situ Fenton reaction, and belongs to the field of treatment of pollutants in water. The method comprises A) a step of synthesis of iron-doped graphite phase carbon nitride, namely a step of calcining a mixture of ferric ions and melamine at high temperature, washing and drying; B) a step of ultrasonically activating to remove acetaminophen, namely a step of adding iron-doped graphite phase carbon nitride into polluted water containing acetaminophen, ultrasonically activating to generate hydrogen peroxide and hydroxyl free radicals, and oxidizing and degrading the acetaminophen. The method is simple to operate, does not need to introduce ultraviolet light or additionally add hydrogen peroxide or other oxidants, and has the advantages of high removal efficiency and wide application conditions.

Description

technical field [0001] The invention belongs to the technical field of water environment pollutant removal. Background technique [0002] Acetaminophen, also known as paracetamol, is one of the most commonly used over-the-counter analgesics and antipyretics in the world, and it can be toxic if used in excess of the recommended safe dosage. In recent years, liver and kidney damage induced by acetaminophen has received extensive attention. Studies have shown that acetaminophen is one of the most frequently detected drugs and personal care products in natural surface water and sewage treatment plant effluent, with a detection concentration of 0.003-30 μg / L, indicating that traditional domestic sewage treatment methods cannot effectively remove paracetamol. Acetaminophen. Treatment of acetaminophen in tap water with sodium hypochlorite produces a semiquinone-type intermediate that is more toxic than acetaminophen. Therefore, it is of great research significance and practical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/38
CPCC02F1/725C02F2305/026C02F2305/023C02F2101/38Y02W10/37
Inventor 周驰杨子欣苗滕
Owner 湖北省水利水电科学研究院
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