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Preparation method of curing isolation impervious body for organic pollutants

A technology for organic pollutants and anti-seepage bodies, applied in the field of soil remediation, can solve problems such as improper safety protection measures, pollution of various pollutants, and poor management, and achieve the effects of low remediation cost, high leaching concentration, and simple treatment process.

Active Publication Date: 2014-12-31
JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these places have piled up or processed toxic and dangerous materials, the soil of these construction sites is more or less polluted by one, and more often, multiple pollutants, some of which are even particularly harmful to the human body. Hazardous substances, such as PCBs disposal sites in my country, due to poor management and improper safety protection measures, some places have caused leakage

Method used

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  • Preparation method of curing isolation impervious body for organic pollutants
  • Preparation method of curing isolation impervious body for organic pollutants

Examples

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Effect test

Embodiment 1

[0039] A method for preparing a solidified isolation anti-seepage body for organic pollutants, comprising the following steps:

[0040] (1) After adding 83.4 g of ferrous sulfate heptahydrate to 1000 g of polluted soil containing 100 mmol of chlorinated total moles and mixing uniformly, adding 74.2 g of 27.5% hydrogen peroxide, mixing uniformly and curing for 24 hours, hydrogen peroxide is catalyzed by ferrous ions Decomposed into hydroxyl radicals, hydroxyl radicals are a kind of active oxygen with strong oxidizing ability. After the organic pollutants are oxidized by Fenton’s reagent, the organic pollutants contained in them are gradually degraded into carbon dioxide and water, reducing and reducing the The harm of organic matter to the human body and the pollution to the environment. Add 23.7g of potassium permanganate, 8.4g of reduced iron powder, 50g of cement, 10g of bentonite, 10g of activated carbon, etc. and mix evenly to obtain the soil for solidified isolation anti-...

Embodiment 2

[0045] A method for preparing a solidified isolation anti-seepage body for organic pollutants, comprising the following steps:

[0046](1) Add 20g of reduced iron powder and 100g of ferrous sulfate heptahydrate to 1000g of contaminated soil containing 100mmol of chlorinated substances and mix evenly, then add 111.3g of 27.5% hydrogen peroxide, mix evenly and maintain for 36 hours, then add potassium permanganate 56.9 g, 75g of cement, 45g of bentonite, 30g of activated carbon, etc. are evenly mixed to obtain solidified isolation anti-seepage body soil;

[0047] (2) Add appropriate amount of tap water to the solidified isolation anti-seepage body soil obtained to keep the moisture content of the solidified isolation anti-seepage body soil at 25%, and then backfill the solidified isolation anti-seepage body soil to the polluted area, and compact and maintain it for 5 days to form a solidification of 40 cm Isolation impermeable body.

Embodiment 3

[0049] A method for preparing a solidified isolation anti-seepage body for organic pollutants, comprising the following steps:

[0050] (1) After adding 56g of reduced iron powder and 139g of ferrous sulfate heptahydrate to 1000g of contaminated soil containing 100mmol of chlorinated matter and mixing evenly, add 185.5g of 27.5% hydrogen peroxide and mix evenly and after curing for 78 hours, add potassium permanganate 118.5 g, 100g of cement, 80g of bentonite, 50g of activated carbon, etc. are evenly mixed to obtain solidified isolation anti-seepage body soil;

[0051] (2) Add appropriate amount of tap water to the solidified isolation anti-seepage body soil obtained to keep the moisture content of the solidified isolation anti-seepage body soil at 30%, and then backfill the solidified isolation anti-seepage body soil to the polluted area, and compact and maintain it for 7 days to form a 50cm solidification Isolation impermeable body.

[0052] Through actual engineering appli...

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Abstract

The invention relates to the field of soil remediation and particularly relates to a preparation method of a curing isolation impervious body for organic pollutants. The preparation method comprises the following steps: (1) adding ferrous sulfate into contaminated soil containing organic matters, uniformly mixing, adding hydrogen peroxide, uniformly mixing, curing for a period of time, adding potassium permanganate, reduced iron powder, cement, bentonite, activated carbon and the like, and uniformly mixing to obtain soil for the curing isolation impervious body; (2) adding an appropriate amount of water into the obtained soil for the curing isolation impervious body, then backfilling into a contaminated area, and compacting and curing for 5-7 days to form the curing isolation impervious body of 30-50cm. The preparation method adopting the technical scheme provided by the invention has the following beneficial effects: (1) the treatment process of the organic matters is simple; (2) the remediation cost is low, and the environmental load is reduced; (3) the leaching concentration of the organic matters in the contaminated soil can be fast and efficiently reduced; (4) the migration of the organic matters can be effectively prevented.

Description

technical field [0001] The invention relates to the field of soil restoration, in particular to a method for preparing a solidified isolation anti-seepage body for organic pollutants. Background technique [0002] With the rapid development of urbanization in my country, the demand for urban construction land is increasing. Many construction lands were originally urban chemical production land, storage land, domestic waste accumulation land or other special land, such as dangerous goods production, storage Shipping, handling, etc. Because these places have piled up or processed toxic and dangerous materials, the soil of these construction sites is more or less polluted by one, and more often, multiple pollutants, and some pollutants are even particularly harmful to the human body. Hazardous substances, such as PCBs disposal sites in my country, have leaked in some places due to poor management and improper safety protection measures. Environmental pollution accidents and hum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/08
Inventor 李海建唐晓声李玲
Owner JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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