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Method for removing organophosphorus pesticide in wastewater

A technology for organophosphorus pesticides and wastewater, applied in chemical instruments and methods, water pollutants, light water/sewage treatment, etc., can solve the problems of organophosphorus pesticide wastewater pollution, etc., and achieve a simple method, high treatment efficiency, and easy operation Effect

Active Publication Date: 2017-05-31
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a method for removing organophosphorus pesticides in wastewater, which can effectively solve the pollution of organophosphorus pesticide wastewater and protect the ecological environment

Method used

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  • Method for removing organophosphorus pesticide in wastewater
  • Method for removing organophosphorus pesticide in wastewater
  • Method for removing organophosphorus pesticide in wastewater

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Effect test

Embodiment 1

[0018] The present invention in concrete implementation, comprises the following steps:

[0019] (1) Preparation of Fe / NiO / graphene composites by hydrothermal synthesis:

[0020] Weigh 0.12g of Fe(NO 3 ) 3 9H 2 O and 4.35g of Ni(NO 3 ) 3 ·6H 2 O, put it in a 200mL beaker, then add 2.1g of citric acid to the beaker, mix thoroughly, then add an aqueous ethanol solution with a volume ratio of 1:5 to the beaker, shake it at room temperature for 30min, and add it to the mixture Add 1.5g of graphene, under the action of ultrasound, the graphene is evenly dispersed in the mixed solution to form a suspension, under magnetic stirring, add 7mL of NaOH solution with a concentration of 10mol / L dropwise into the above suspension within 8min, fully Stir for 25 minutes to form an orange-yellow suspension, then pour it into a constant-pressure reaction kettle with built-in plexiglass lining, fill it with nitrogen protection, and react at 130°C for 16 hours, separate the suspension, and ...

Embodiment 2

[0027] In specific implementation, the present invention can also be realized by the following steps:

[0028] (1), Fe / NiO / graphene composites were prepared by hydrothermal synthesis:

[0029] 0.22g of Fe(NO 3 ) 3 9H 2 O and 6.58g of Ni(NO 3 ) 3 ·6H 2 O is placed in a 200mL beaker, and 2.5g of citric acid is added to the beaker, mixed thoroughly, and then an aqueous ethanol solution with a volume ratio of 1.2:5 is added to the beaker, shaken at room temperature for 30min, and 1.98g of graphene is added, and ultrasonically assisted Under magnetic stirring, 8 mL of NaOH solution with a concentration of 10 mol / L was added dropwise to the above suspension within 8 minutes, and stirred for 25 minutes to form an orange suspension, which was then poured into In a constant-pressure reaction kettle with built-in plexiglass lining, under nitrogen protection, react at 130°C for 16 hours, separate the suspension, and dry the precipitated part in a vacuum drying oven at 100°C, then u...

Embodiment 3

[0036] The present invention in concrete implementation, comprises the following steps:

[0037] (1) Preparation of Fe / NiO / graphene composites by hydrothermal synthesis:

[0038] 0.65g of Fe(NO 3 ) 3 9H 2 O and 8.72g of Ni(NO 3 ) 3 ·6H 2 O was placed in a 200mL beaker, and then 3.4g of citric acid was added to the beaker, mixed thoroughly, and then an aqueous ethanol solution with a volume ratio of 1.5:5 was added to the beaker, and after shaking at room temperature for 30min, 2.35g of citric acid was added to the mixture. Graphene, under the action of ultrasound, the graphene is evenly dispersed in the mixed solution to form a suspension. Under magnetic stirring, 9 mL of NaOH solution with a concentration of 10 mol / L is added dropwise to the above suspension within 8 minutes, and stirred for 25 minutes to form The orange-yellow suspension is then poured into a constant-pressure reaction kettle with a built-in plexiglass liner, protected by nitrogen, and reacted at 130°C...

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Abstract

The invention relates to a method for removing organophosphorus pesticide in wastewater. The method can effectively prevent pollution caused by organophosphorus pesticide wastewater and can protect the ecological environment. The method comprises mixing Fe(NO3)3. 9H2O, Ni(NO3)3. 6H2O and citric acid, dissolving the mixture in an ethanol aqueous solution, then adding graphene into the solution, carrying out ultrasonic treatment to obtain a suspension liquid, carrying out magnetic stirring, adding a NaOH solution into the mixture drop by drop, carrying out a reaction process in a nitrogen protective atmosphere, carrying out separation, precipitation and vacuum drying, respectively washing the dries materials through deionized water and ethanol three times, carrying out drying to obtain a Fe / NiO / graphene composite material, adding water into organophosphorus pesticide wastewater until COD is 130.28 to 315.47 mg / L, adding Oxone into the wastewater, carrying out uniform stirring, adjusting pH to 7 through an alkaline substance, adding the Fe / NiO / graphene composite material into the wastewater, carrying out uniform stirring and carrying out ultraviolet light irradiation. The method realizes degradation of organic phosphorus pesticide wastewater. The method has the advantages of simple processes, operation easiness, high treatment efficiency, energy saving, environmental friendliness and large economic and social benefits.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for removing organic phosphorus pesticides in waste water. Background technique [0002] my country's pesticide production ranks second in the world, and its usage ranks first in the world. Organophosphorus pesticides in pesticides are widely used in my country's agricultural production due to their characteristics of many varieties, good effects, and low prices. [0003] The main purpose of organophosphorus pesticides in modern agricultural production is to eliminate pests and diseases, protect the growth of crops, and have a good effect on increasing crop production. However, in the synthesis and production process of organophosphorus pesticides, a large amount of wastewater with complex components, difficult to treat, high toxicity and difficult to biodegrade will be produced, which will cause serious pollution to the environment if discharged directly. At th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C02F1/32C02F101/30
CPCC02F1/32B01J23/755C02F2101/30B01J35/39
Inventor 郑宾国赵丽平张珂李春光牛俊玲程文博崔节虎
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS