Method used for simultaneous decomposition of three carbamate pesticides via O3-H2O2 synergistic oxidation

A carbamate, O3-H2O2 technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., to achieve high accuracy, quality assurance, and environmental protection effects

Inactive Publication Date: 2018-02-23
NINGXIA UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no information about its adoption of O 3 / H 2 o 2 Related reports on the degradation of amecarb, pirimicarb and bectocarb by synergistic oxidation

Method used

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  • Method used for simultaneous decomposition of three carbamate pesticides via O3-H2O2 synergistic oxidation
  • Method used for simultaneous decomposition of three carbamate pesticides via O3-H2O2 synergistic oxidation
  • Method used for simultaneous decomposition of three carbamate pesticides via O3-H2O2 synergistic oxidation

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Embodiment 1

[0019] 1.1 Instruments and materials:

[0020] AGILENT-1100 high-performance liquid chromatography, UV-2450 ultraviolet-visible spectrophotometer, WH-ozone generator, AL204 electronic balance, DF-101Z collector type constant temperature heating magnetic stirrer, SHZ-Ⅲ circulating water vacuum pump, DY- 2000 rotary evaporator.

[0021] 1.2 Drugs and reagents:

[0022] Methanol (chromatographically pure), NaHCO 3 , KI 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.

[0023] 1.3 Reference substance stock solution:

[0024] 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 solutions are recorded as...

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Abstract

The invention relates to a method used for simultaneous decomposition of three carbamate pesticides, including tsumacide, carbofuran, and pirimicarb via O3 / H2O2 synergistic oxidation. The method comprises following steps: 1, aqueous solutions of tsumacide, carbofuran, and pirimicarb are introduced into a container; 2, KI is weighed and introduced into a tail gas absorption bottle at a mass ratio of the three pesticides to KI of 0.42-1.25mg:1g, 30% H2O2 is added into the aqueous solutions of the three pesticides at a total mass amount of the three pesticides to the volume amount of 30% H2O2 of0.42-0.50mg:1ml, an obtained mixture is mixed to be uniform, the pH value is adjusted with NaHCO3 to 5.6 to 9.2, stirring is carried out, an ozone generator is turned on, and O3 / H2O2 synergistic oxidation is carried out. According to the method, excellent effect is achieved via decomposition of the three carbamate pesticides via O3 / H2O2 synergistic oxidation.

Description

technical field [0001] The present invention relates to an O 3 / H 2 o 2 Synergistic oxidation method for the simultaneous degradation of three carbamate pesticides, namely amecarb, carbofuran and pirimicarb. Background technique [0002] Carbamate pesticides are one of the widely used pesticides at present. This kind of pesticides are developed from formate esters as precursor compounds. They have the characteristics of fast decomposition, short residual period, high efficiency and strong selectivity. Since the 1970s, the use of carbamate pesticides has increased year by year due to the successive bans or restrictions on the use of organochlorine pesticides in different countries and the increasing number of insect species resistant to organophosphorus pesticides. However, if the carbamate pesticides are used in large quantities for a long time, while ensuring the increase of crop yield and harvest, a large amount of residual pesticides will not only directly poison the h...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/78C02F101/30C02F101/38
CPCC02F1/722C02F1/78C02F2101/306C02F2101/38
Inventor 郝凤霞何金兰周佳鹤郝运驻马玉龙杨金会
Owner NINGXIA UNIVERSITY
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