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Fe3O4/CNTs-based synergic microwave organic pesticide degradation method

A technology of organic pesticides and synergistic microwaves, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve the problems of incomplete degradation, secondary pollution, etc. High degradation efficiency and the effect of improving the degradation effect

Inactive Publication Date: 2016-10-12
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They are accompanied by the formation of intermediate products during the degradation process, and the degradation is not complete, which can cause secondary pollution

Method used

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  • Fe3O4/CNTs-based synergic microwave organic pesticide degradation method
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  • Fe3O4/CNTs-based synergic microwave organic pesticide degradation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The influence of embodiment 1 catalyst on degradation organic pesticide

[0015] Pretreatment of carbon nanotube CNTs: accurately weigh 5.0 g of carbon nanotube CNTs (20-40 nm) powder, put it into 300 mL of 2.0 mol / L nitric acid solution, and boil at 100 ° C for 30 min. Cool to room temperature, filter, wash with deionized water several times until pH = 7, filter, dry in a vacuum drying oven at 105°C for 6.0 h, grind to obtain purified CNTs powder, store in a desiccator for future use.

[0016] Fe 3 o 4 Supported carbon nanotube nanoparticles Fe 3 o 4 / CNTs preparation: Ultrasonic dispersion of pretreated carbon nanotubes CNTs in deionized water, ultrasonic treatment for 15min, a certain amount of Fe(NO 3 ) 3 9H 2 O was added to the mixed solution, and ultrasonically treated for 20 minutes, and NaAc was added to adjust the pH of the solution to 2.5-6.0, and ultrasonicated for 15 minutes, then the mixed solution was added to a polytetrafluoroethylene autoclave, sea...

Embodiment 2

[0036] The method of embodiment 2 degradation organic pesticide methyl parathion

[0037] Pretreatment of carbon nanotube CNTs: accurately weigh 5.0g of carbon nanotube CNTs (20-40nm) powder, put it into 300mL, 2.0mol / L nitric acid solution, and boil at 100°C for 30min. Cool to room temperature, filter, wash with deionized water several times until pH = 7, filter, dry in a vacuum drying oven at 105°C for 6.0 h, grind to obtain purified CNTs powder, store in a desiccator for future use.

[0038] Fe 3 o 4 Supported carbon nanotube nanoparticles Fe 3 o 4 / CNTs preparation: Ultrasonic dispersion of pretreated carbon nanotubes CNTs in deionized water, ultrasonic treatment for 15min, a certain amount of Fe(NO 3 ) 3 9H 2 O was added to the mixed solution, and ultrasonically treated for 20 minutes, and NaAc was added to adjust the pH of the solution to 5.0, and ultrasonicated for 15 minutes. Pressure 1.5MPa, microwave 300W, temperature 210°C, microwave irradiation for 30min, ta...

Embodiment 3

[0054] Embodiment 3 comparative experiment

[0055] Prepared by co-precipitation method: 0.4g of purified carbon nanotubes (CNTs) were ultrasonically dispersed in 15mL of deionized water, and ultrasonically treated for 10min to form a stable suspension. A certain amount of Fe(NO 3 ) 3 9H 2 O (M=404.02) was added to the mixed solution, and ultrasonic treatment was performed for 15 minutes. Add NaAc to adjust the pH of the solution to 5.0, sonicate for 10 minutes, raise the temperature to 95°C while stirring, and maintain it for 60 minutes. The mixture was filtered, washed several times with deionized water, and dried in an oven at 180 °C for 2 h. Calcined at 250°C for 6h after taking out, cooling and grinding after taking out.

[0056] Prepared by hydrothermal method: 0.4g purified carbon nanotubes CNTs were ultrasonically dispersed in 15mL deionized water, and treated ultrasonically for 10min. A certain amount of Fe(NO 3 ) 3 9H 2 O (M=404.02) was added to the mixed so...

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Abstract

The invention relates to a Fe-based 3 o 4 / CNTs Synergistic Microwave Degradation of Organic Pesticides. The technical scheme adopted is: in the water containing organic pesticide, add catalyzer, irradiate 1-7min under microwave 150-750W; Described catalyzer is Fe 3 o 4 Supported carbon nanotube nanoparticles Fe 3 o 4 / CNTs. The organic pesticide is Diuron or methyl parathion. As a new method for treating organic pesticide wastewater, the invention has the advantages of high degradation efficiency, fast speed, low cost and no secondary pollution, etc., is suitable for large-scale organic pesticide wastewater treatment, and can quickly and completely degrade organic pesticide in a short time.

Description

technical field [0001] The invention belongs to the field of catalytic degradation, in particular to Fe prepared by microwave hydrothermal method 3 o 4 Supported carbon nanotube nanoparticles Fe 3 o 4 / CNTs combined with microwave irradiation to rapidly degrade organic pesticides. Background technique [0002] The production, use and discharge of organochlorine herbicides, as well as pesticide residues, seriously threaten the water environment and human health. Organochlorine herbicides have complex components, stable chemical structure, high toxicity, and are difficult to be biodegraded. Conventional water treatment technologies are also difficult to degrade this type of organic wastewater. Therefore, it is quite necessary to explore new methods that can rapidly and effectively degrade organochlorine herbicides. [0003] Diuron, [N-(3,4-dichlorophenyl)]-N',N'-dimethylurea, a herbicide widely used for pre- and post-harvest weed control. Has been listed as carcinogenic...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/72
CPCC02F1/302C02F1/725C02F2101/306
Inventor 张朝红田方圆刘逸伦纪剑峰袁天新沈曼莉郜炜
Owner LIAONING UNIVERSITY
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