In-situ remediation method for organic matter polluted soil

A technology for in-situ remediation of polluted soil, applied in the field of soil pollution remediation, can solve the problems of complex soil pretreatment, high power consumption, and high equipment cost for ex-situ remediation, and achieve the goals of promoting rapid degradation, easy separation and recycling, and reducing treatment costs Effect

Inactive Publication Date: 2020-07-03
HENAN YUQIAN TECH TRANSFER CENT CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The patent No. CN 103056155 discloses a low-temperature plasma collaborative photocatalytic treatment of polluted soil reactor and its treatment method. The polluted soil first undergoes a discharge reaction in the low-temperature plasma reaction section, and undergoes a primary degradation, which will be volatilized from the soil The remaining organic matter is introduced into the photocatalytic reaction section for photocatalytic reaction, which shortens the degradation time of organic pollutants in the soil and improves its degradation effect, but there are problems such as complicated soil pretreatment, high equipment cost, and excessive power consumption. shortcoming

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  • In-situ remediation method for organic matter polluted soil

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Effect test

Embodiment 1

[0027] A method for in-situ remediation of organic-contaminated soil, the method is divided into the following steps:

[0028] Step 1. Loosen and crush the organic-contaminated soil, remove impurities, detect the type and content of organic pollutants in the soil, pour water into it, and keep the soil humidity at 25%;

[0029] Step 2, by mass ratio 1:80 will solubilizer / TiO 2 / CdS bentonite magnetic hydrogel microspheres are sprinkled on the surface of the target soil, and exposed to sunlight or simulated sunlight for 4 hours to photocatalytically degrade organic pollutants, and then use a magnetic field to separate the solubilizer / TiO 2 / CdS bentonite magnetic hydrogel microspheres, washed with water, dried, and irradiated with ultraviolet light for 10 s before use;

[0030] Step 3: Turn the soil, loosen, and crush the soil to keep the soil humidity at 25%, repeat the operation of Step 2 six times, and detect the content of various organic pollutants in the soil.

[0031] F...

Embodiment 2

[0041] A method for in-situ remediation of organic-contaminated soil, the method is divided into the following steps:

[0042] Step 1. Loosen and crush the organic-contaminated soil, remove impurities, detect the type and content of organic pollutants in the soil, pour water into it, and keep the soil humidity at 30%;

[0043] Step 2, by mass ratio 1:100 will solubilizer / TiO 2 / CdS bentonite magnetic hydrogel microspheres are sprinkled on the surface of the target soil, and exposed to sunlight or simulated sunlight for 5 hours to photocatalytically degrade organic pollutants, and then use a magnetic field to separate the solubilizer / TiO 2 / CdS bentonite magnetic hydrogel microspheres, washed with water, dried, and irradiated with ultraviolet light for 15 s for later use;

[0044] Step 3: Turn the soil, loosen, and crush the soil to keep the soil humidity at 30%, repeat the operation of Step 2 five times, and detect the content of various organic pollutants in the soil.

[00...

Embodiment 3

[0055] A method for in-situ remediation of organic-contaminated soil, the method is divided into the following steps:

[0056] Step 1. Loosen and crush the soil contaminated by organic matter, remove impurities, detect the type and content of organic pollutants in the soil, pour water into the soil, and keep the soil humidity at 35%;

[0057] Step 2, by mass ratio 1:110 will solubilizer / TiO 2 / CdS bentonite magnetic hydrogel microspheres sprinkled on the surface of the target soil, exposed to sunlight or simulated sunlight for 6 hours, TiO 2 / CdS for photocatalytic degradation of organic pollutants, followed by magnetic field separation of solubilizer / TiO 2 / CdS bentonite magnetic hydrogel microspheres, washed with water, dried, and irradiated with ultraviolet light for 20 s before use;

[0058] Step 3: Turn the soil, loosen, and crush the soil to keep the soil humidity at 35%, repeat the operation of Step 2 four times, and detect the content of various organic pollutants in t...

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Abstract

The invention discloses an in-situ remediation method for organic matter polluted soil. Firstly, organic matter polluted soil is simply pretreated; then, solubilizer/TiO2/CdS bentonite magnetic hydrogel microspheres are sprayed on the surface layer of the soil; organic pollutants are photo-catalytically decomposed under the irradiation of sunlight; the used solubilizer/TiO2/CdS bentonite magnetichydrogel microspheres are simple to prepare, can be separated and recycled under the action of an external magnetic field, and can be repeatedly used according to the organic matter pollution degree of soil; the soil remediation difficulty is greatly reduced, and the manpower and equipment are saved. In-situ remediation is carried out on the soil surface, the photocatalytic reaction speed is high,there is no pollutant selectivity, the remediation time is short, the soil remediation can be repeatedly carried out, the remediation method is suitable for soil with different pollution degrees, nopost-treatment is needed, no chemical reagent is used, no secondary pollution is generated, sowing can be directly carried out after remediation, and economic benefits are good.

Description

technical field [0001] The invention relates to the technical field of soil pollution remediation, in particular to an in-situ remediation method for organic-contaminated soil. Background technique [0002] With the rapid development of industry and agriculture, the problem of environmental pollution is becoming more and more serious. Soil problems caused by the rapid development of chemical industry, coke, oil refining, agriculture and transportation are becoming more and more serious. Organic pollutants in soil often include petroleum hydrocarbons, polychlorinated biphenyls, polycyclic aromatic hydrocarbons, polychlorinated biphenyls and some difficult-to-degrade pesticides. The hydrophobicity of organic matter makes it potentially toxic, carcinogenic, and weak in bioavailability, and it is easy to accumulate in the food chain. Recently, organic pollution in soil has become a focus of environmental governance. The diversity of synthetic organic species and the wide range...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
CPCB09C1/08B09C2101/00
Inventor 吉永明
Owner HENAN YUQIAN TECH TRANSFER CENT CO LTD
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