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Preparation method of high-reducibility nano material and application of high-reducibility nano material in underground water pollution treatment

A technology of groundwater pollution and nanomaterials, applied in the treatment of groundwater pollution, in the field of preparation of strongly reducing nanomaterials, can solve problems such as inability to obtain light

Active Publication Date: 2015-07-15
INST OF CHEM CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, groundwater cannot be illuminated due to its special conditions. Therefore, it is necessary to design new materials and application methods that use semiconductor photocatalysis technology to treat groundwater pollution. They can be directly injected into the ground, used as a medium for osmotic reaction walls, or directly added to the groundwater that has been pumped out of the surface. middle

Method used

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  • Preparation method of high-reducibility nano material and application of high-reducibility nano material in underground water pollution treatment
  • Preparation method of high-reducibility nano material and application of high-reducibility nano material in underground water pollution treatment
  • Preparation method of high-reducibility nano material and application of high-reducibility nano material in underground water pollution treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Under the condition of argon, add 5% ZnO nanomaterials to 5% acetic acid aqueous solution, stir evenly, and react for 2 hours under the irradiation of ultraviolet light, so that the ZnO nanomaterials are in an electron-rich state, and made into strongly reducing nanomaterials . The prepared strong reducing nanometer material is directly added to simulated wastewater containing 0.01 mmol / L of decabromodiphenyl ether, and after stirring and reacting under anaerobic conditions, the removal rate of decabromodiphenyl ether is greater than 85%.

[0029] figure 1 The change of in-situ reflection ultraviolet-visible spectrum when the photochemical reduction reaction of the ZnO strongly reducing nano-material prepared above is irradiated by ultraviolet light, in the presence of methanol, and in argon atmosphere is given. Among them, the absorption in the range of 500-1000nm gradually increases, and from the visual point of view of the material itself, the color of the material ...

Embodiment 2

[0031] Under vacuum conditions, add 0.5% TiO to 2% potassium iodide aqueous solution 2 Nanomaterials, stirred evenly, and reacted for 5 hours under the irradiation of ultraviolet light, so that TiO 2 Nanomaterials present an electron-rich state and are made into strongly reducing nanomaterials. Add the prepared strong reducing nanomaterials to the groundwater pumped directly from a well (70 meters deep) in a polluted area, which contains about 0.005 mmol / L of 2,4-dichlorophenol, and stir the reaction under anaerobic conditions Finally, the removal rate of 2,4-dichlorophenol was greater than 90%.

[0032] figure 2 Given the TiO prepared above 2 The change of the ultraviolet-visible spectrum of the in-situ reflection of the strongly reducing nano-material when the photochemical reduction reaction occurs under the irradiation of ultraviolet light, the presence of methanol, and the atmosphere of argon. Among them, the absorption in the range of 500-1000nm gradually increases, a...

Embodiment 3

[0034] Under nitrogen, 15% Pd-TiO was added to 20% isopropanol aqueous solution 2 Nanomaterials, stirred evenly, reacted for 8 hours under the irradiation of ultraviolet light, making Pd-TiO 2 Nanomaterials present an electron-rich state and are made into strongly reducing nanomaterials. The prepared strong reducing nanomaterials were added as the medium of the permeable reaction wall to the permeable reaction wall simulation device (height 50cm, inner diameter 5cm) made of plexiglass, and 0.05mM The mole / liter decachlorobiphenyl aqueous solution passes through the reaction wall equipped with reducing nano-materials to control the water penetration rate to 0.7-0.8m / d, and the removal rate of decachlorobiphenyl in the effluent is greater than 90%.

[0035] image 3 Given the above-prepared Pd-TiO 2 In-situ reflection infrared spectrum changes of strongly reducing nanomaterials when they react under ultraviolet light, in the presence of isopropanol, and in an argon atmosphere...

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Abstract

The invention relates to a preparation method of a high-reducibility nano material and application of the high-reducibility nano material in underground water pollution treatment. The high-reducibility nano material is prepared by enabling a nano semiconductor material to be in an electron enriched state under oxygen-free conditions in the presence of a sacrifice agent by a photochemical process. The high-reducibility nano material can be used for efficiently removing pollutants which are difficulty for oxidative degradation in underground water.

Description

technical field [0001] The invention belongs to the technical field of environmental water purification, and in particular relates to a preparation method of a strongly reducing nanometer material and its application in groundwater pollution treatment. Background technique [0002] With the growth of population and the rapid development of social economy, the exploitation of groundwater in our country is increasing year by year. However, the excessive exploitation of groundwater has caused serious groundwater funnels to be formed in many areas of our country. In addition, surface environmental pollution has intensified, agricultural irrigation and excessive application of pesticides and fertilizers have caused groundwater pollution, which seriously threatens the health and property safety of Chinese residents. The increasingly severe groundwater environmental problems have become an important factor restricting the sustainable development of nature, society and economy. Th...

Claims

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Application Information

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IPC IPC(8): C02F1/70
Inventor 赵进才常巍马万红籍宏伟陈春城
Owner INST OF CHEM CHINESE ACAD OF SCI
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