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A kind of method that utilizes amorphous red phosphorus to promote ferric iron/hydrogen peroxide system to degrade environmental pollutants

A technology for environmental pollutants and hydrogen peroxide, applied in the field of environmental pollutant treatment, can solve the problems of increased cost of reaction reagents, difficult power cycle, increased processing cost, etc., and achieves high activation efficiency, wide pH application range and high degradation efficiency. Effect

Active Publication Date: 2022-07-26
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional Fenton method must ensure sufficient ferrous ions (Fe 2+ ), Fe 2+ Activation of H as a catalyst 2 o 2 Produce hydroxyl radicals ( OH), which themselves are oxidized to Fe 3+
Although theoretically Fe 3+ able to be H 2 o 2 again reduced to Fe 2+ , but actually Fe 3+ In the Fenton system only a very small fraction is reduced, so Difficult to power cycle between
For example, Chinese patent CN104310567A reported the use of protocatechuic acid to promote method of power cycle, but protocatechuic acid is an organic compound, which itself will be absorbed by H 2 o 2 The OH produced by activation is degraded, so it is necessary to continuously add protocatechuic acid, thereby increasing the cost of the reaction reagent
In addition, the Fenton method needs to be carried out under acidic conditions. For example, the Chinese patent CN 107686156 A reports a Fenton method for efficiently degrading organic pollutants in water. This method requires a large amount of acid to adjust the pH of the wastewater. After the treatment, the wastewater is acidic and requires the addition of alkali. Callback, resulting in increased processing costs

Method used

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  • A kind of method that utilizes amorphous red phosphorus to promote ferric iron/hydrogen peroxide system to degrade environmental pollutants
  • A kind of method that utilizes amorphous red phosphorus to promote ferric iron/hydrogen peroxide system to degrade environmental pollutants
  • A kind of method that utilizes amorphous red phosphorus to promote ferric iron/hydrogen peroxide system to degrade environmental pollutants

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 A kind of novel Fenton reaction system

[0030]Take 2.0 g of red phosphorus and 18 mL of ultrapure water, mix them evenly, and place them in a hydrothermal reactor for hydrothermal reaction at 200°C for 16 hours. After filtering, washing and drying, purified red phosphorus is obtained.

[0031] The purified red phosphorus was observed by scanning electron microscope (SEM, Zeiss G-500) and X-ray diffraction (XRD, Rigaku SmartLab) ( figure 1 ), the purified red phosphorus is irregular particles, and its lattice structure is amorphous, that is, the purified red phosphorus is amorphous red phosphorus.

[0032] Using purified amorphous red phosphorus (Red P) as a reaction reagent, react with H 2 O 2 and FeCl 3 Together to form a new type of Fenton reaction system, namely RedP / H 2 O 2 / Fe 3+ system.

Embodiment 2

[0033] Example 2 Determination of Red P / H 2 O 2 / Fe 3+ Degradation efficiency and kinetic constant of ibuprofen by the system

[0034] The measurement method is as follows:

[0035] (1) Prepare an ibuprofen solution with a concentration of 20 ppm.

[0036] (2) Take 60mL of ibuprofen solution in step (1) and transfer it into 5 100mL beakers respectively, and the reaction systems of these 5 beakers are respectively set as: H 2 O 2 , Red P, Fe 3+ / H 2 O 2 , Red P / H 2 O 2 , Red P / H 2 O 2 / Fe 3+ . Among them, Red P, H 2 O 2 and Fe 3+ The dosages of 0.2 g / L, 1 mM and 0.2 mM, respectively, were sampled on the set time gradient for testing.

[0037] (3) Detect the ibuprofen concentration in the water sample of step (2) with high performance liquid chromatography (HPLC, Thermo Fisher Scientific), the detection wavelength is 223 nm, and the mobile phase is phosphoric acid water (pH3.0) / methanol (20 / 80), the flow rate was 1 mL / min, and the peak time was 6.5 min. The c...

Embodiment 3

[0041] Example 3 Determination of Red P / H 2 O 2 / Fe 3+ The degradation efficiency of the system to different pollutants

[0042] The measurement method is as follows:

[0043] (1) Prepare solutions of ibuprofen (IBU), norfloxacin (NFX), rhodamine B (RhB) and methyl blue (MB) with a concentration of 20 ppm.

[0044] (2) Take 60mL of the four pollutant solutions in step (1) and transfer them to four 100mL beakers, respectively, and then add 0.2g / L red phosphorus, 1mM H 2 O 2 and 0.2mM Fe 3+ , sample on the set time gradient to be measured.

[0045] (3) Detect the ibuprofen concentration in the water sample of step (2) with high performance liquid chromatography (HPLC, Thermo Fisher Scientific), the detection wavelength is 223 nm, and the mobile phase is phosphoric acid water (pH3.0) / methanol (20 / 80), the flow rate was 1 mL / min, and the peak time was 6.5 min. Use high performance liquid chromatography to detect the concentration of norfloxacin in the water sample of step...

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Abstract

The invention belongs to the technical field of environmental pollutant treatment, and in particular relates to a method for utilizing amorphous red phosphorus to promote the degradation of environmental pollutants in a ferric / hydrogen peroxide system. The invention provides a Fenton system for efficiently activating hydrogen peroxide. The Fenton system includes red phosphorus, hydrogen peroxide and Fe 3+ . The Fenton system is based on Fe, which is widely present in the water environment. 3+ As a precursor for the Fenton reaction, Fe 3+ reduced to Fe 2+ , making it the same as H 2 O 2 The Fenton reaction occurs to generate OH to degrade pollutants. At the same time, the newly formed Fe 3+ Will be further reduced by red phosphorus, therefore, the present invention does not need to add unstable Fe 2+ reagents. In addition, the method of the present invention has H 2 O 2 It has the advantages of high activation efficiency, fast power cycle, wide pH application range, high pollutant degradation efficiency, and can effectively degrade various pollutants and various pollutants in actual water bodies.

Description

technical field [0001] The invention belongs to the technical field of environmental pollutant treatment, and in particular relates to a method for utilizing amorphous red phosphorus to promote the degradation of environmental pollutants by a ferric / hydrogen peroxide system. Background technique [0002] In recent years, the large-scale use of environmental pollutants (including anti-inflammatory drugs, antibiotics, organic dyes, etc.) in daily life and industrial production makes them widely exist in the environment, especially in the water environment and its impact on aquatic organisms The potential hazard of worms has attracted worldwide attention in recent years. Studies have shown that although many environmental pollutants are not persistent and refractory organic matter, they are continuously released into the water environment through sewage treatment plants, agricultural runoff, aquaculture and drug production due to their massive output and consumption. Over time...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/70C02F101/30
CPCC02F1/72C02F1/722C02F1/70C02F2101/30
Inventor 胡卓锋郑宁超何茜胡睿婷
Owner SUN YAT SEN UNIV
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