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Slow-release bactericide for inhibiting growth of thiobacillus ferroxidana and preparation method thereof

A technology of Thiobacillus ferrooxidans and bactericide, which is applied in the field of microbial chemistry and slow-release pharmaceutical science, can solve the problems of inability to long-term inhibit the oxidation of oxidative bacteria to produce acid, low utilization rate of bactericide, loss of light from bactericide, etc. Long-term effective control, rapid solute exchange, and the effect of improving utilization

Inactive Publication Date: 2010-05-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the fungicide is directly added under field conditions, there will be problems such as a large amount of fungicide loss with rainwater and light inactivation, resulting in a low utilization rate of the fungicide, and it cannot inhibit the oxidative acid production of oxidizing bacteria for a long time

Method used

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  • Slow-release bactericide for inhibiting growth of thiobacillus ferroxidana and preparation method thereof
  • Slow-release bactericide for inhibiting growth of thiobacillus ferroxidana and preparation method thereof
  • Slow-release bactericide for inhibiting growth of thiobacillus ferroxidana and preparation method thereof

Examples

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Effect test

example 1 16

[0033] Example 1 cetyltrimethylammonium bromide slow-release fungicide

[0034] 1 Method: ① The ratio of the components of the bactericide: cellulose acetate (CA): acetone: water: Tween 80: cetyltrimethylammonium bromide (CTAB) = 8: 44: 10: 1.5: 8 (mass ratio, unit g); ② preparation temperature conditions: cellulose acetate solution 35 ~ 40 ℃, coolant 20 ~ 25 ℃. ③ Drop the cellulose acetate solution into the condensing agent with a syringe to condense into a spherical shape, and the particle size of the spherical fungicide is 1-2mm.

[0035] 2 results

[0036] According to the results of SEM, FTIR and elemental analysis, it can be known that through figure 1 , 2 It can be seen that the prepared sustained-release dropping pills are white spherical particles with a smooth surface and a loose structure inside, which is conducive to the release of the bactericidal component CTAB; by FTIR results image 3 It can be seen that the spectra of CTAB and dripping pills are at 3020cm ...

example 2

[0039] Example 2: Inhibition of pyrite biooxidation by SDS slow-release fungicide

[0040]1 Method: ① The ratio of the components of the fungicide: cellulose acetate (CA): acetone: water: Tween 80: sodium dodecylsulfonate = 8: 45: 10: 1.5: 7 (mass ratio, unit g); ②Preparation temperature conditions: cellulose acetate solution 35-40°C, coolant 20-25°C. ③ Drop the cellulose acetate solution into the condensing agent with a syringe to condense into a spherical shape, and the particle size of the spherical fungicide is 1-2mm. ④ In order to prove the slow-release effect of the slow-release fungicide drop pills, an SDS dissolution experiment was set up, the specific conditions were 150r / min, 30°C shaking table leaching, sampling and testing the concentration of SDS in the solution every 24 hours, and the leaching time was 15 days . ⑤ In order to test the effective time of the slow-release fungicide on the biooxidation of tailings, a shaker was set to leaching the ore for 30 days. ...

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Abstract

The invention discloses a slow-release bactericide for inhibiting the growth of thiobacillus ferroxidana and a preparation method thereof, belonging to the fields of mine pollution remediation technology and application. In the invention, a water-soluble bactericide and acetone solution of polymer materials are dripped into condensate to form a spherical slow-release bactericide; a polymer film on the outer surface of the bactericide has hydrophilicity and can realize rapid solute exchange with external water solution; and the bactericide loaded on the polymer film is uniformly dispersed among polymer frameworks. With the dissolution of the bactericide on the surface layer, a plurality of micropores are formed to ensure the dissolution of the active components in the slow-release bactericide, thereby realizing the purpose of continuously dissolving the bactericide in the pills to play a role of slow release.

Description

technical field [0001] The invention belongs to the field of microbial chemistry and slow-release pharmaceutical science, and in particular relates to a preparation method of a slow-release fungicide capable of inhibiting the growth of Thiobacillus ferrooxidans and the prepared fungicide. Background technique [0002] Metal mine tailings have caused serious environmental problems in the process of open-pit stacking, which has become the top priority of pollution control in mining areas. Studies at home and abroad have shown that the main source of tailings pollution is the oxidation of sulfide in tailings. In addition to the chemical oxidation caused by direct exposure to air, oxidative bacteria such as Thiobacillus ferrooxidana (T.f) The bio-oxidation of the ferrooxidans played a greater role, and Thiobacillus ferrooxidans could increase the oxidation reaction rate by about 10 6 times. Therefore, controlling the biological oxidation of sulfide has become an important way ...

Claims

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Application Information

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IPC IPC(8): A01N25/34A01N41/04A01N33/12A01P1/00
Inventor 党志张哲舒小华
Owner SOUTH CHINA UNIV OF TECH
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