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Method for removing ddt compounds in aqueous phase

A compound and water removal technology, applied in the direction of silicon compounds, separation methods, inorganic chemistry, etc., can solve the problems of secondary pollution that cannot be recycled and reused by reaction reagents, harsh reaction conditions, etc., and achieve the effect of purifying polluted water bodies and requiring simple equipment

Inactive Publication Date: 2018-03-09
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction conditions of this method are harsh, and the reaction reagents cannot be recycled and reused, resulting in secondary pollution.

Method used

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  • Method for removing ddt compounds in aqueous phase
  • Method for removing ddt compounds in aqueous phase
  • Method for removing ddt compounds in aqueous phase

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Preparation of Fe with core-shell structure using existing technology 3 o 4 @nSiO 2 @mSiO 2 Magnetic mesoporous silica materials.

[0027] Monodisperse Fe 3 o 4 Nanoparticles were prepared by solvothermal method with FeCl3 ·6H 2 O is the source of iron, ethylene glycol is used as the solvent, and it is prepared by reacting at 180-200°C for 6-12 hours; 0.2g of the prepared Fe 3 o 4 , added to a mixed solution containing 4mL ammonia water, 320mL ethanol and 76mL water, after ultrasonication for 30 minutes, 4mL tetraethyl orthosilicate (TEOS) was added dropwise, and reacted on a shaker for 24 hours; after the reaction was completed, the obtained product was used successively Wash with deionized water and ethanol, and dry at 60°C for 12 hours to obtain Fe 3 o 4 @nSiO 2 Magnetic silicon oxide material. The resulting Fe 3 o 4 @nSiO 2 The transmission electron microscope characterization diagram of the magnetic silicon oxide material is shown in figure 2 .

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Embodiment 2

[0033] With ascorbic acid as reducing agent, adopt liquid phase reduction method to the Fe with core-shell structure of embodiment 1 3 o 4 @nSiO 2 @mSiO 2 Magnetic mesoporous silica materials were synthesized by noble metal palladium modification.

[0034] Adding ascorbic acid to PdCl containing polyvinylpyrrolidone (PVP) 2 In aqueous solution, after reacting at 80°C for 1 hour, Fe with core-shell structure was added 3 o 4 @nSiO 2 @mSiO 2 Magnetic mesoporous silica material, stirred vigorously for 4 hours, washed the obtained product with water and ethanol, and dried at 60°C to obtain palladium-supported Fe with core-shell structure 3 o 4 @nSiO 2 @Pd / mSiO 2 Magnetic mesoporous silica materials. The resulting Fe with a core-shell structure 3 o 4 @nSiO 2 @Pd / mSiO 2 The transmission electron microscope characterization of the magnetic mesoporous silicon oxide material is shown in figure 2 , the results of the magnetic strength analysis are shown in image 3 , th...

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Abstract

The present invention relates to a method for removing DDT compounds from an aqueous phase. The present invention is to disperse the magnetic mesoporous silicon oxide material with core-shell structure in water containing DDT compound, so that the DDT compound is absorbed and enriched on the magnetic mesoporous silicon oxide material with core-shell structure from water; In this case, the magnetic mesoporous silica material with core-shell structure is conveniently separated from water by using magnetic separation technology, so as to purify the water body and realize the removal of DDT compounds in water. The separated magnetic mesoporous silica material with a core-shell structure adsorbed with DDT compounds is subjected to a catalytic degradation reaction at a temperature of 25-200°C to achieve dechlorination and degradation of DDT compounds and their secondary degradation products DDE compounds reaction to regenerate the magnetic mesoporous silica material with a core-shell structure to achieve recycling. The invention is simple, fast, environment-friendly and low in energy consumption, and can be applied to the treatment of large and small polluted water bodies.

Description

technical field [0001] The invention relates to a method for removing organic chlorine compounds in water, in particular to a method for removing DDT compounds in water phase. Background technique [0002] Organochlorine compounds include chlorinated aliphatic hydrocarbons and chlorinated aromatic hydrocarbons, which are widely used in various chemical raw materials, reagents, and pesticides; their chemical properties are relatively stable, and they are easy to accumulate in organisms, soil, and organic matter in sediments. Degradation is slow in nature, and the cycle of environmental hazards is long. Many organic chlorine compounds, such as lindane, DDT, dioxins, polychlorinated biphenyls, etc., are considered to have "carcinogenic, teratogenic, and mutagenic" effects, and are priority pollutants controlled by various countries. The first 12 controlled persistent organic pollutants (Persistent Organic Pollutants, POPs) in the Stockholm Convention are basically organochlori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/48B01J20/10B01J20/34
Inventor 贺军辉田华
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI