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Soil pollution repairing agent and repairing method thereof

A technology for soil pollution and remediation agent, applied in the field of soil pollution remediation agent and its remediation, can solve the problems of low removal rate and long curing period, and achieve the effect of increasing adsorption capacity, improving mutual synergy, and being beneficial to adsorption capacity

Pending Publication Date: 2022-04-12
刘金梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the existing long curing period and low removal rate, and provide a soil pollution remediation agent and its remediation method

Method used

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  • Soil pollution repairing agent and repairing method thereof
  • Soil pollution repairing agent and repairing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A soil pollution remediation agent, the preparation method of the remediation agent is as follows:

[0033] (1) Mix 2g of sepiolite powder, 0.6g of magnesite powder and 9g of corn stalk to obtain mixture A;

[0034] (2) Potassium permanganate, lanthanum nitrate and samarium nitrate are dissolved in deionized water of 100mL to obtain mixed solution B, wherein the concentration of potassium permanganate is 0.1mol / L, the concentration of lanthanum nitrate is 0.13mol / L, The concentration of samarium nitrate is 0.13mol / L;

[0035] (3) Add the mixture A obtained in step (1) to the mixed solution B, ultrasonically disperse for 3 hours, evaporate to dryness in a constant temperature water bath at 90°C, and then keep warm at 380°C for 3h under a nitrogen atmosphere with an oxygen content of 0.1% by volume , and then heat preservation treatment at 600° C. for 3 hours, and cool to room temperature to obtain a soil pollution remediation agent.

Embodiment 2

[0037] A soil pollution remediation agent, the preparation method of the remediation agent is as follows:

[0038] (1) 2g of sepiolite powder, 0.8g of magnesite powder and 6g of rice straw were uniformly mixed to obtain mixture A;

[0039](2) Potassium permanganate, lanthanum nitrate and samarium nitrate are dissolved in 100mL of deionized water to obtain mixed solution B, wherein the concentration of potassium permanganate is 0.1mol / L, the concentration of lanthanum nitrate is 0.14mol / L, The concentration of samarium nitrate is 0.12mol / L;

[0040] (3) Add the mixture A obtained in step (1) to the mixed solution B, ultrasonically disperse for 4 hours, evaporate to dryness in a constant temperature water bath at 100°C, and then keep the temperature at 400°C under a helium atmosphere with an oxygen content of 0.2% by volume 2h, then heat preservation treatment at 650°C for 2h, and cool to room temperature to obtain a soil pollution remediation agent.

Embodiment 3

[0042] A soil pollution remediation agent, the preparation method of the remediation agent is as follows:

[0043] (1) Mix 2g sepiolite powder, 0.4g magnesite powder and 12g wheat straw to obtain mixture A;

[0044] (2) configure potassium permanganate, lanthanum nitrate and samarium nitrate to be dissolved in 100mL of deionized water to obtain mixed solution B, wherein the concentration of potassium permanganate is 0.1mol / L, the concentration of lanthanum nitrate is 0.12mol / L, The concentration of samarium nitrate is 0.14mol / L;

[0045] (3) Add the mixture A obtained in step (1) to the mixed solution B, ultrasonically disperse for 2 hours, evaporate to dryness in a constant temperature water bath at 80°C, and then keep the temperature at 350°C under a neon atmosphere with an oxygen content of 0.05% by volume 4h, then heat preservation treatment at 550°C for 4h, and cool to room temperature to obtain a soil pollution remediation agent.

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Abstract

The invention belongs to the field of soil remediation, and particularly relates to a soil pollution remediation agent and a remediation method thereof. The preparation method of the repairing agent comprises the following steps: uniformly mixing sepiolite powder, magnesite powder and a biomass raw material to obtain a mixture A; preparing a mixed solution B of potassium permanganate, lanthanum nitrate and samarium nitrate, then adding the mixture A into the mixed solution B, carrying out ultrasonic dispersion, carrying out constant-temperature water bath evaporation to dryness, carrying out heat preservation for 2-4 hours at 350-400 DEG C in an oxygen-containing atmosphere, then carrying out heat preservation treatment for 2-4 hours at 550-650 DEG C, and cooling to room temperature to obtain the soil pollution remediation agent. The obtained remediation agent can rapidly solidify heavy metal in soil, and is high in removal rate, low in cost, small in usage amount and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of soil restoration. More specifically, it relates to a soil pollution remediation agent and a remediation method thereof. Background technique [0002] With the acceleration of industrialization and urbanization, the soil environment is also deteriorating, especially the pollution of heavy metals in soil, which has become a problem that seriously affects human health and environmental safety. There are about 10 million hectares of arable land polluted by heavy metals such as cadmium (Cd), arsenic (As), mercury (Hg), copper (Cu), and zinc (Zn) in China. "Arsenic rice", etc.) amounted to more than 10 million tons, causing direct economic losses of more than 20 billion yuan. Yang Li et al. investigated and analyzed the total amount of Cd, Pb, Zn and Cu and their forms in the green land soil of residents in Zhuhui District, Hengyang City, and found that the content of Cu, Cd, and Pb was 1-5 times that of the ...

Claims

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Application Information

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IPC IPC(8): C09K17/02B09C1/00
Inventor 刘金梅李小玲
Owner 刘金梅
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