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Method for simultaneously degrading three types of carbamic acid ester pesticides by Fenton method

A technology for carbamates and pesticides, applied in chemical instruments and methods, water treatment of special compounds, material separation, etc., to achieve the effects of good reproducibility, environmental protection, and high method accuracy

Inactive Publication Date: 2018-02-06
NINGXIA UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no relevant reports about the degradation of metolcarb, pirimicarb and bectilyl by the Fenton method

Method used

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  • Method for simultaneously degrading three types of carbamic acid ester pesticides by Fenton method
  • Method for simultaneously degrading three types of carbamic acid ester pesticides by Fenton method
  • Method for simultaneously degrading three types of carbamic acid ester pesticides by Fenton method

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Embodiment 1

[0018] 1.1 Instruments and materials:

[0019] AGILENT-1100 high-performance liquid chromatography, UV-2450 ultraviolet-visible spectrophotometer, QP2010 gas chromatography-mass spectrometer, AL204 electronic balance, DF-101Z collector type constant temperature heating magnetic stirrer, SHZ-Ⅲ circulating water vacuum pump, DY- 2000 rotary evaporator.

[0020] 1.2 Drugs and reagents:

[0021] Methanol (chromatographically pure), FeSO 4 and 30%H 2 o 2 (analytical pure), Meprocarb, carbofuran, and pirimicarb reference substances (purchased from the National Center for Standard Materials), and laboratory water was ultrapure water.

[0022] 1.3 Reference substance stock solution:

[0023] Precisely and accurately weigh 0.0100g of each of the reference substances of pirimicarb, carbofuran and methiocarb, dissolve them in methanol, transfer them to a 10mL volumetric flask, set the volume to the mark, shake well, and prepare 1000μg / mL reference substances respectively The soluti...

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Abstract

The invention relates to a method for simultaneously degrading three types of carbamic acid ester pesticides, namely, meta-tolyl-N-meth ylcarbamate, carbofuran and pirimicarb by a Fenton method. The method is characterized by comprising the following steps: (1) firstly, putting an aqueous solution containing three types of pesticides, namely, meta-tolyl-N-meth ylcarbamate, carbofuran and pirimicarb at the same time into a container; (2) weighing FeSO4 under the condition that the ratio of the total mass of the three pesticides to the mass of the FeSO4 is (2.08 to 3.12mg) to 1g, adding the weighed FeSO4 into the solution, mixing uniformly, then rapidly adding 30 percent H2O2 into the uniformly-mixed solution under the condition that the ratio of the total mass of the three pesticides to thevolume of the 30 percent H2O2 is (0.42 to 0.50mg) to 1mL, mixing uniformly, continually stirring for 2 to 3 hours, and lastly filtering with a microfiltration membrane of 0.22 to 0.45 mu m. Through the method for degrading the three types of carbamic acid ester pesticides by the Fenton method, a better effect is achieved.

Description

technical field [0001] The invention relates to a method for simultaneously degrading three carbamate pesticides, ie, amecarb, carbofuran and pirimicarb, by a Fenton method. Background technique [0002] Carbamate pesticides are plant-derived insecticides, which have the advantages of good insecticidal effect, fast decomposition, short residual period, and low toxicity to humans and animals. They are gradually replacing organochlorine pesticides and partially replacing organophosphorus pesticides, and their usage is increasing year by year. , is one of the most widely used pesticides in the world. However, if carbamate pesticides are used in large quantities for a long time, while ensuring the increase of crop yield and harvest, the pesticides remaining in the crops will not only cause direct poisoning to the human body, And pollute the ecological environment. Therefore, how to effectively control pesticide pollution has become an urgent problem to be solved. [0003] Fent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72G01N30/02G01N30/74C02F101/30C02F101/34C02F101/38
CPCC02F1/722C02F1/725C02F2101/306C02F2101/34C02F2101/38C02F2305/026G01N30/02G01N30/74
Inventor 郝凤霞何金兰杨金会郝运驻
Owner NINGXIA UNIVERSITY
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