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Sustained-release agent for in-situ remediation of chlorohydrocarbon-contaminated groundwater in deep mine

An in-situ remediation, chlorinated hydrocarbon technology, applied in the treatment of polluted groundwater/leachate, restoration of polluted soil, water pollutants, etc., can solve problems such as waste of chemicals, achieve resource saving, high density, reduce The effect of production costs

Inactive Publication Date: 2019-11-05
山东省地质矿产勘查开发局八〇一水文地质工程地质大队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the slow-release oxygen material provided by this invention patent has a step of adding water. After the raw material is added with water, persulfate and calcium peroxide react with water, resulting in waste of medicine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Grind raw materials, pass through 200 mesh sieves, and mix raw materials according to the following ratio in terms of weight percentage: 20% calcium peroxide, 40% sodium persulfate, 15% Portland cement, 2% cyclodextrin, 23% Mix and stir the ferrite tourmaline evenly. At 25°C, add absolute ethanol drop by drop, and keep stirring until the solid mixture is completely wetted to obtain a slurry mixture, wherein the weight of absolute ethanol and the powder mixture The ratio is 1:5, the obtained slurry mixture is granulated by a granulator to obtain spherical particles with a diameter of 10mm; the obtained spherical particles are dried at 60°C under the protection of nitrogen, and the ethanol is recovered to be used in Finished product of slow-release agent for in-situ remediation of chlorinated hydrocarbon-contaminated groundwater in deep mines.

[0030] The prepared slow-release agent used for the in-situ restoration of chlorinated hydrocarbon polluted groundwater in deep ...

Embodiment 2

[0032] Grind the raw materials, cross 200 mesh sieves, and mix the raw materials according to the following ratio in terms of weight percentage: 30% calcium peroxide, 30% sodium persulfate, 20% chitosan, 4% cyclodextrin, 16% Mix and stir the ferrite tourmaline evenly, add absolute ethanol drop by drop at 30°C, and keep stirring until the solid mixture is completely wetted to obtain a slurry mixture, wherein the weight ratio of absolute ethanol to the powder mixture is The obtained slurry mixture was granulated by a granulator at a ratio of 1:10 to obtain spherical particles with a diameter of 20mm; the obtained spherical particles were dried at 70°C under the protection of nitrogen, and ethanol was recovered to be used in deep layers. The finished slow-release agent for in-situ remediation of mine chlorinated hydrocarbon-contaminated groundwater.

[0033]The prepared slow-release agent for in-situ restoration of chlorinated hydrocarbon-contaminated groundwater in deep mines wa...

Embodiment 3

[0035] Grind the raw materials, pass through a 200 mesh sieve, and mix the raw materials according to the following ratio in terms of weight percentage: 40% calcium peroxide, 20% sodium persulfate, 15% Portland cement, 5% cyclodextrin, 20% Mix and stir the ferrite tourmaline evenly. At 40°C, add absolute ethanol drop by drop, and keep stirring until the solid mixture is completely wetted to obtain a slurry mixture, wherein the weight of absolute ethanol and the powder mixture The ratio is 1:10, the obtained slurry mixture is granulated by a granulator to obtain spherical particles with a diameter of 30mm; the obtained spherical particles are dried at 75°C under the protection of nitrogen, and the ethanol is recovered to be used in Finished product of slow-release agent for in-situ remediation of chlorinated hydrocarbon-contaminated groundwater in deep mines.

[0036] The prepared slow-release agent for in-situ restoration of chlorinated hydrocarbon-contaminated groundwater in ...

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Abstract

The invention provides a sustained-release agent for in-situ remediation of chlorohydrocarbon-contaminated groundwater in a deep mine. The sustained-release agent is prepared from, by weight, 10-40% of peroxide, 5-30% of iron tourmaline, 20-50% of persulfate, 1-5% of a surfactant and 5-20% of a binder. According to the provided sustained-release agent for the in-situ remediation of the chlorohydrocarbon-contaminated groundwater in the deep mine, the density of solid particles is large, the sustained-release agent can enter the bottom layer of underground contaminated water by using the sedimentation action of the gravity when injected into the groundwater in the deep mine, a double oxidation system is formed after the sustained-release agent is dissolved in the water, chlorohydrocarbon contaminants sunk at the water bottom are degraded, the degradation efficiency is obviously improved, and the pH value of an aqueous solution can also be adjusted, so that the aqueous solution tends to be neutral.

Description

technical field [0001] The invention belongs to the field of groundwater restoration, and relates to a slow-release agent for in-situ restoration of groundwater polluted by chlorinated hydrocarbons in deep mines. Background technique [0002] In recent years, with the continuous acceleration of my country's economic and industrialization process, and the further implementation of the policies of "retreating from the second to the third" and "retreating from the city to the park", a large number of polluting enterprises have been forced to relocate, renovate or even shut down production, resulting in the city and its surrounding areas. There are a large number of industrial leftovers and abandoned polluted sites in the area, causing serious pollution to groundwater and soil, especially chlorinated hydrocarbon pollutants, and this type of organic pollutants have "three-caused" effects, namely mutagenic, carcinogenic and teratogenic effects , pose a serious threat to human health...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F1/72C02F1/28B09C1/00C02F103/06C02F101/36
CPCB09C1/002B09C2101/00C02F1/00C02F1/28C02F1/722C02F2101/36C02F2103/06C02F2209/22C02F2209/29C02F2305/023C02F2305/04
Inventor 刘玉仙王晓东丁冠涛张克刚闫涛彭圣洁张晓慧赵振超张刚
Owner 山东省地质矿产勘查开发局八〇一水文地质工程地质大队
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