A kind of potassium permanganate sustained-release agent and its preparation method and application

A technology of potassium permanganate and slow-release agent, which is applied in application, chemical instruments and methods, agriculture, etc., can solve problems such as unstable release concentration, permeability problems, and adsorption problems, and achieve good treatment effects and adsorption properties. Enhanced, long-release effect

Active Publication Date: 2020-12-25
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ideal effect of sustained-release agents is very good, but in actual preparation and theoretical performance testing, there are still some problems: such as unstable release concentration, permeability problems, by-product clogging problems, adsorption problems, etc.

Method used

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  • A kind of potassium permanganate sustained-release agent and its preparation method and application
  • A kind of potassium permanganate sustained-release agent and its preparation method and application
  • A kind of potassium permanganate sustained-release agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Use slow release agent as KMnO 4 , paraffin, quartz sand and activated carbon mass ratio of 2:10:10:2 mixed adsorption slow-release agent.

[0039] (1) Preparation of sustained release agent

[0040] Based on microcapsule technology, the sustained-release agent is prepared by melting condensation dispersion method. Take 10g of paraffin in a Erlenmeyer flask, add 20mL of absolute ethanol, and heat in a water bath to 75°C; when the paraffin is completely melted, add 1g of polyethylene glycol-4000 and 1 drop of Span-80, and stir thoroughly; press 2:10 : Add 10g of quartz sand, 2g of activated carbon and 2g of potassium permanganate powder in sequence at a mass ratio of 10:2, stir to disperse evenly; pour it into a prepared mold with a size of 1.0cm×1.0cm×1.0cm while it is hot; After cooling and drying, the cube-shaped solid potassium permanganate slow-release agent can be obtained.

[0041] figure 1 for KMnO4 , paraffin, quartz sand and activated carbon mass ratio of 2...

Embodiment 2

[0062] Use slow release agent as KMnO 4 , paraffin, quartz sand and activated carbon mass ratio of 2:10:10:3 mixed adsorption slow-release agent.

[0063] Preparation of sustained-release formulations:

[0064] Based on microcapsule technology, the sustained-release agent is prepared by melting condensation dispersion method. Take 10g of paraffin in a Erlenmeyer flask, add 20mL of absolute ethanol, and heat in a water bath to 75°C; when the paraffin is completely melted, add 1g of polyethylene glycol-4000 and 1 drop of Span-80, and stir thoroughly; press 2:10 : Add 10g of quartz sand, 3g of activated carbon and 2g of potassium permanganate powder in sequence at a mass ratio of 10:3, stir to disperse evenly; pour it into a prepared mold with a size of 1.0cm×1.0cm×1.0cm while it is hot; After cooling and drying, the cube-shaped solid potassium permanganate slow-release agent can be obtained.

Embodiment 3

[0066] Use slow release agent as KMnO 4 , paraffin, quartz sand and activated carbon mass ratio of 2:10:10:4 mixed adsorption slow-release agent.

[0067] Preparation of sustained-release formulations:

[0068] Based on microcapsule technology, the sustained-release agent is prepared by melting condensation dispersion method. Take 10g of paraffin in a Erlenmeyer flask, add 20mL of absolute ethanol, and heat in a water bath to 75°C; when the paraffin is completely melted, add 1g of polyethylene glycol-4000 and 1 drop of Span-80, and stir thoroughly; press 2:10 Add 10g of quartz sand, 4g of activated carbon and 2g of potassium permanganate powder in sequence at a ratio of 10:4, stir to disperse evenly; pour it into a prepared mold with a size of 1.0cm×1.0cm×1.0cm while it is hot; After cooling and drying, the cube-shaped solid potassium permanganate slow-release agent can be obtained.

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Abstract

The invention discloses a potassium permanganate sustained-release agent. The potassium permanganate sustained-release agent comprises the following raw materials by mass: 30% to 50% of paraffin, 30%to 50% of quartz sand, 5% to 20% of activated carbon and 5% to 10% of potassium permanganate, summing to 100%. The invention also discloses a preparation method for the potassium permanganate sustained-release agent. The preparation method comprises the following steps of: (1) adding the paraffin into a mixture of absolute ethanol and polyethylene glycol, carrying out heating to 60-80 DEG C, and performing stirring until the paraffin is completely melted; (2) adding a surfactant, the quartz sand, activated carbon powder and potassium permanganate into a solution obtained in the step (1) understirring; and (3) cooling a molten material obtained in the step (2) so as to obtain the potassium permanganate sustained-release agent. The invention also discloses the application of the potassium permanganate sustained-release agent to repairing soil and groundwater contaminated by volatile organic pollutants. The potassium permanganate sustained-release agent has good coating effect, low release rate, good permeability and adsorption performance, and the characteristic of mixed adsorption.

Description

technical field [0001] The invention relates to the technical field of soil and groundwater remediation, in particular to a potassium permanganate slow-release agent and its preparation method and application. Background technique [0002] Groundwater is an important part of water resources. Its significance lies in serving as drinking water for residents, ensuring agricultural water use, supporting social and economic development, and maintaining ecological balance. However, soil and groundwater pollution is becoming more and more serious, and volatile organic pollutant pollution is a core problem that is difficult to overcome. Groundwater pollution usually leads to soil pollution, and soil pollution is also an important source of groundwater pollution. Soil pollution can be used as a source of groundwater pollution, especially soil containing water-insoluble organic matter, which can continuously release harmful substances. Therefore, the natural environment is difficult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/08B09C1/00
CPCB09C1/002B09C1/08B09C2101/00C09K17/40
Inventor 陈华丽刘正文严凯鑫徐帆王挺吴礼光
Owner ZHEJIANG GONGSHANG UNIVERSITY
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