Method for degrading organophosphorus pesticide

A technology of organophosphorus pesticides and diazinones, which is applied in chemical instruments and methods, energy and wastewater treatment, water/sludge/sewage treatment, etc., can solve problems such as eutrophication of water bodies, save water resources, and achieve remarkable degradation effects. , the effect of less time-consuming

Active Publication Date: 2020-09-18
LIAONING UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

However, its use also brings some unavoidable environmental p

Method used

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  • Method for degrading organophosphorus pesticide
  • Method for degrading organophosphorus pesticide
  • Method for degrading organophosphorus pesticide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 The effect of the number of holes in the orifice plate on the degradation of organophosphorus pesticides by hydraulic cavitation

[0031] The parameters of the orifice plate are: single round hole, three round holes and five round holes, the diameter of each hole is 2mm, such as figure 2 Shown in 6a, 6b, 6c.

[0032] Put 5.0 L of diazinon solution with a concentration of 10 mg / L into the closed reaction tank 1, inject cold water into the placing box 2 to control the temperature at 40 ° C, and control the inlet pressure to be 0.5 MPa, and the diazinon solution passes through the pressure. After being detected by the inlet pressure gauge 4a and the inlet flowmeter 5a, the pump 3 is transported to the orifice plate 6 for hydrodynamic cavitation degradation reaction, and then detected by the outlet pressure gauge 4b ​​and the outlet flowmeter 5b, and then flows back into the closed reaction tank 1. The water sample was taken out from the sampling port 8 for 30 m...

Embodiment 2

[0033] Example 2 Influence of the angle of the orifice plate on the hydrodynamic cavitation degradation of organophosphorus pesticides

[0034] The parameters of the orifice plate are: the angle of the orifice plate is the incident angle of 45°, the incident angle of 0° and the divergence angle of 45°, and the diameter of each hole is 2 mm.

[0035] Put 5.0 L of diazinon solution with a concentration of 10 mg / L into the closed reaction tank 1, inject tap water into the condensed water tank 2 to control the temperature at 40 °C, control the inlet pressure to 0.5 MPa, and the diazinon solution passes through the pressure. After being detected by the inlet pressure gauge 4a and the inlet flowmeter 5a, the pump 3 is transported to the orifice plate 6 for hydrodynamic cavitation degradation reaction, and then detected by the outlet pressure gauge 4b ​​and the outlet flowmeter 5b, and then flows back into the closed reaction tank 1. The water sample was taken out from the sampling p...

Embodiment 3

[0036] Example 3 Influence of the initial concentration of pollutants on the degradation of organophosphorus pesticides by orifice hydraulic cavitation

[0037] The parameters of the orifice plate are: an orifice plate with three shrink holes, the diameter of each hole is 2mm, and the shrinkage angle is 45°. The operating parameters are: the inlet pressure is 0.5MPa, the solution is 5.0L, and the temperature is controlled at 30-50°C.

[0038] Put 5.0L of the prepared diazinon solution with concentrations of 5mg / L, 10mg / L and 15mg / L into the closed reaction tank 1, inject cold water into the condensed water tank 2 to control the temperature at 40°C, and control the inlet pressure to be 0.5MPa, the diazinon solution is transported to the orifice plate 6 after being detected by the pressure pump 3 through the inlet pressure gauge 4a and the inlet flowmeter 5a to carry out the hydrodynamic cavitation degradation reaction, and then detected by the outlet pressure gauge 4b ​​and the...

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Abstract

The invention relates to the field of degradation of pesticide-containing wastewater, in particular to a method for degrading organophosphorus pesticide. The method comprises putting an organophosphorus pesticide solution into a closed reaction water tank, adding an inorganic oxidant, and stirring to degrade the organophosphorus pesticide, wherein the organophosphorus pesticide is diazinon, the inorganic oxidant is one or more than two of potassium persulfate, sodium perchlorate and potassium periodate and the molar ratio of the inorganic oxidant to the organophosphorus pesticide is 2: 1. Themethod is low in treatment cost, simple to operate and free of secondary pollution, and the degradation rate of diazinon in the wastewater after the inorganic oxidant is added can reach 80% or above.

Description

technical field [0001] The invention relates to the field of degradation of wastewater containing pesticides, in particular to a method for degrading organophosphorus pesticides. Background technique [0002] Organophosphorus pesticides are already a common chemical present in wastewater due to their widespread use in agricultural-dominated countries. Diazinon (C 12 H 21 N 2 O 3 PS), as a highly toxic organophosphorus pesticide, is often used to control pests in residential, agricultural and livestock areas. However, its use also brings some unavoidable environmental problems such as soil compaction and water eutrophication. In fact, diazinon not only has an impact on the ecological environment, but its long-term stability will also endanger human health. If diazinon is absorbed into the human body, it will inhibit the activity of acetylcholinesterase in the nervous system and endanger human health. Healthy body. The World Health Organization (WHO) has classified diaz...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/30
CPCC02F1/72C02F2101/306Y02W10/37
Inventor 王君李庶张朝红李博骞伊鲁东
Owner LIAONING UNIVERSITY
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