Method for degrading organic pollutants in water through cooperation of catalyst and ionization irradiation

A technology of organic pollutants and ionizing radiation, applied in the direction of water pollutants, chemical instruments and methods, light water/sewage treatment, etc., can solve the problem of ionizing radiation on the removal rate, mineralization rate and removal effect of organic pollutants Low cost, economically unfeasible, etc., to achieve the effect of stable physical and chemical properties, simple preparation method, and excellent performance

Pending Publication Date: 2021-11-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, pure ionizing radiation technology requires a large irradiation dose to completely degrade and mineralize organic pollutants with higher concentrations (greater than 10mg / L), which is economically unfeasible; and a large number of organic pollutants in water Dissolved organic matter (DOM) and CO 3 2- , NO 3 - Isoanions, which compete with organic pollutants for hydroxyl radicals produced by irradiation, significantly affect the removal rate and mineralization rate of organic pollutants by ionizing radiation, and their removal effect is significantly lower than that of pure water systems. Further development of efficient ionizing radiation Synergistic Enhancement Technology

Method used

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  • Method for degrading organic pollutants in water through cooperation of catalyst and ionization irradiation
  • Method for degrading organic pollutants in water through cooperation of catalyst and ionization irradiation
  • Method for degrading organic pollutants in water through cooperation of catalyst and ionization irradiation

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preparation example Construction

[0052] 1. Catalyst Preparation

[0053] Carbon nanodots / carbon nitride binary composites (g-C 3 N 4 / CDs) are prepared as follows:

[0054] Carbon nanodots / carbon nitride binary composites were prepared by thermal polymerization. The reaction raw materials were 50g of urea and 1.5g of citric acid (ground) mixed evenly, then put into a muffle furnace, and the temperature was raised to 550°C at a rate of 1°C / min. Take it out after 3 hours of heat preservation, and cool it down to room temperature naturally to obtain a gray-black solid. After grinding, a carbon nanodot / carbon nitride binary composite material is obtained, which is recorded as g-C 3 N 4 / CDs.

[0055] The carbon nano-dot / carbon nitride / metal ternary composite material (in g-C 3 N 4 / CDs / Fe 2+ The preparation method of ternary composite material is as follows:

[0056] The above-prepared g-C 3 N 4 Weigh 0.4g of the CDs / CDs binary composite material, put it into a FeSO4 solution with a volume of 100mL and ...

Embodiment 1

[0087] The method for degrading organic pollutants in water by catalyst coordinated ionizing radiation is characterized in that it comprises the following steps:

[0088] 1) Add g-C to the wastewater containing 500mg / L methylene blue solution 3 N 4 / CDs Binary Composite, g-C 3 N 4 The ratio of the mass added to the / CDs binary composite material to the volume of the methylene blue solution is 1g / L, and the mixture is uniform;

[0089] 2) Carry out ionizing radiation, the radiation dose is 5kGy, degrade methylene blue in water.

Embodiment 2

[0091] The method for degrading organic pollutants in water by catalyst coordinated ionizing radiation is characterized in that it comprises the following steps:

[0092] 1) Add g-C to the wastewater containing 500mg / L methylene blue solution 3 N 4 / CDs Binary Composite, g-C 3 N 4 The ratio of the mass added to the / CDs binary composite material to the volume of the methylene blue solution is 2g / L, and the mixture is uniform;

[0093] 2) Carry out ionizing radiation, the radiation dose is 5kGy, degrade methylene blue in water.

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Abstract

The invention discloses a method for degrading organic pollutants in water by using a catalyst in cooperation with ionization irradiation. The method comprises the following steps: adding a catalyst into wastewater containing organic pollutants, and uniformly mixing; and performing ionization irradiation treatment to degrade the organic pollutants in water, wherein the catalyst comprises a carbon nanodot / carbon nitride binary composite material, or a carbon nanodot / carbon nitride / metal ternary composite material, or a carbon nanodot / carbon nitride / metal oxide ternary composite material. According to the method, organic wastewater is utilized, a carbon nanodot / carbon nitride binary composite material or a carbon nanodot / carbon nitride / metal ternary composite material or a carbon nanodot / carbon nitride / metal oxide ternary composite material is irradiated through ionization, a degradation technology is combined, and the additive amount of the catalyst is changed to research the possibility of the technology; and research shows that the technology can be applied to the aspect of degrading high-concentration organic pollutants.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for degrading organic pollutants in water by catalysts in cooperation with ionizing radiation. Background technique [0002] In recent years, water pollution has become a serious environmental problem and has attracted widespread attention, especially chlorinated pollutants, PPCPs (pharmaceuticals and personal care products), benzene, phenol, aniline and their derivatives are widely used in dyes, Organic pollutants in pesticide, pharmaceutical, chemical and other industries. These organic pollutants are highly water-soluble, persistent and highly toxic, and have brought great challenges to the water environment and human health. It is imminent to solve the problem of water pollution. At present, there are various sewage treatment methods, and the common treatment methods include physical method, chemical method, biological method, advanced oxidation method and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/72C02F1/28B01J27/24C02F101/30
CPCC02F1/305C02F1/722C02F1/725C02F1/283B01J27/24B01J35/0013C02F2101/308C02F2305/023C02F2305/026C02F2305/10
Inventor 杨淼赵龙李文夏涛
Owner WUHAN UNIV OF TECH
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