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Ozone micro-bubble generator for degrading pesticides and preparation method therefor

A micro-bubble generator, a technology for degrading pesticides, applied in chemical instruments and methods, dissolution, application and other directions, can solve problems such as slow reaction rate, save costs, reduce energy consumption, and improve the effect of degradation rate

Inactive Publication Date: 2018-05-01
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although most oxidation reactions in water treatment are thermodynamically feasible, the reaction rate is very slow, and many organic pollutants are difficult to be completely oxidized by general oxidants

Method used

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  • Ozone micro-bubble generator for degrading pesticides and preparation method therefor
  • Ozone micro-bubble generator for degrading pesticides and preparation method therefor
  • Ozone micro-bubble generator for degrading pesticides and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation flow chart of ozone microbubble generator is as follows: figure 1 .

[0033] Take 40g of iron-containing alumina powder with a particle size of 10-20μm in a 100ml beaker, and add 4g of prepared adhesive. Stir to obtain a uniformly mixed billet, pour the billet into a cylindrical mold with a diameter of 65mm and a thickness of 6.5mm, and then press it into a dense green body, put the mold in an oven at 80°C for 1 hour, take it out, open the mold, and the green body Forming, put the formed body into a muffle furnace, raise the temperature to a certain temperature at a rate of 5°C / min, sinter for 1 hour, and naturally cool to obtain the required porous alumina ceramics. The obtained porous alumina ceramics are composed of alumina particles, and the pore size is about 5 μm. Insert the ceramic into the seal and seal it with glue to make a microbubble generator.

[0034] Connect the microbubble generator to the ozone generator and place it in a 1L beaker, a...

Embodiment 2

[0037] The preparation flow chart of ozone microbubble generator is as follows: figure 1 .

[0038] Take 40g of iron-containing alumina powder with a particle size of 50-60μm in a 100ml beaker, and add 5g of prepared adhesive. Stir to obtain a uniformly mixed billet, pour the billet into a cylindrical mold with a diameter of 65mm and a thickness of 6.5mm, and then press it into a dense green body, put the mold in an oven at 80°C for 2 hours, take it out, open the mold, and the green body Forming, put the formed body into a muffle furnace, raise the temperature to a certain temperature at a rate of 5°C / min, sinter for 1.5h, and naturally cool to obtain the required porous alumina ceramics. Insert the ceramic into the seal and seal it with glue to make a microbubble generator.

[0039] Connect the microbubble generator to the ozone generator and place it in a 1L beaker, add 50mg / L imidacloprid, pass through ozone, and degrade for 0.5h. After testing, the degradation rate of imi...

Embodiment 3

[0042] The preparation flow chart of ozone microbubble generator is as follows: figure 1 .

[0043] Take 42g of iron-containing alumina powder with a particle size of 80-100μm in a 100ml beaker, and add 7g of prepared adhesive. Stir to obtain a uniformly mixed billet, pour the billet into a cylindrical mold with a diameter of 65mm and a thickness of 6.5mm, and then press it into a dense green body, put the mold in an oven at 80°C for 1 hour, take it out, open the mold, and the green body Forming, put the formed body into a muffle furnace, raise the temperature to a certain temperature at a rate of 10°C / min, sinter for 2 hours, and naturally cool to obtain the required porous alumina ceramics. The obtained porous alumina ceramics are composed of alumina particles, and the pore size is about 30 μm. Insert the ceramic into the seal and seal it with glue to make a microbubble generator.

[0044] Connect the microbubble generator to the ozone generator and place it in a 1L beake...

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Abstract

The invention discloses an ozone micro-bubble generator for degrading pesticides and a preparation method therefor. The method comprises the steps of mixing ceramic powder of a certain particle size,which serves as a raw material, and an inorganic solution of a certain mass percent, which serves as a binder, to form a blank, carrying out die pressing to form a blank body, preparing a porous ceramic material by adopting a high-temperature sintering method, and embedding the ceramic material into a sealing element, so as to prepare the micro-bubble generator. An ozone generator is used for providing an ozone source, and the micro-bubble generator is used for generating ozone micro-bubbles so as to degrade pesticide residues in water. According to the ozone micro-bubble generator for degrading the pesticides and the preparation method therefor, ozone is released into the water in the form of a large volume of micro-bubbles by using a specific pore size of porous ceramics, thus, the areaof gas-liquid contact is increased, and the degradation rate and degradation ratio of the pesticides are greatly increased; and proven by a detection result, the removal rate of the porous ceramic material disclosed by the invention to the pesticides in the water can reach 97% to the maximum.

Description

technical field [0001] The invention belongs to the field of water treatment of inorganic ceramic materials, and in particular relates to an ozone microbubble generator for degrading pesticides and a preparation method thereof. Background technique [0002] In current agricultural production, pesticides are indispensable means of production and are playing an increasingly important role. According to statistics, the application of pesticides increases the yield of vegetables by about 30%. Vegetables are an indispensable food in people's daily life and a very necessary economic crop. It has become the second largest crop in my country after food. In recent years, with the expansion of the vegetable area and the increase of the protected area, the occurrence of vegetable diseases, insect pests and weeds has continued to increase, which has led to a sharp increase in the use of pesticides. The ensuing problem of pesticide residues is serious, causing serious harm to human heal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78A23L5/20C04B35/10C04B38/00B01F5/06
CPCA23L5/27C02F1/78C04B35/10C04B38/0041C02F2101/306C04B2235/3272C04B2235/3232C04B2235/3418C04B2235/3427B01F25/4522C04B38/0054
Inventor 王田禾周道凯吕翔
Owner NANJING UNIV OF SCI & TECH
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