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Recycling low-cost treatment method for field heavy metal polluted soil

A technology of polluted soil and disposal method, applied in the field of heavy metal pollution, can solve problems such as high cost and achieve the effect of release safety and stability

Inactive Publication Date: 2019-05-07
IRONMAN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a low-cost disposal method for recycling heavy metal-contaminated soil on site, which has the advantages of low cost and high efficiency, and solves the problem of low efficiency and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A low-cost disposal method for recycling heavy metal-contaminated soil on site, comprising the following steps:

[0031] 1) Mix the biomass powder and the clay mineral of the industrial site evenly according to the weight ratio of 1:10 to obtain the mixture. Take 10g of the above mixture, add it to the solution of anhydrous magnesium chloride, add 150mL of water, and carry out the precipitation operation. The precipitation operation is continuous Stirring the solution and adjusting the pH value of the solution to 8 with a regulator to obtain a precipitate, which was synthesized by heating and pressurizing in a hydrothermal reaction kettle, the synthesis temperature was 100°C, the synthesis pressure was 7Mpa, and dried at 200°C; Under the condition of 400°C, roast the dried product for 2 hours, and after cooling to room temperature, grind it into a material of not less than 150 mesh;

[0032] 2) adding water to the material prepared in step 1) and mixing to obtain a solu...

Embodiment 2

[0038] A low-cost disposal method for recycling heavy metal-contaminated soil on site, comprising the following steps:

[0039] 1) Mix the biomass powder and the clay mineral of the industrial site evenly according to the weight ratio of 1:25 to obtain the mixture, take 10g of the above mixture, add it to the solution of anhydrous magnesium chloride, add 300mL of water, and carry out the precipitation operation. The precipitation operation is continuous Stirring the solution and adjusting the pH value of the solution to 8 with a regulator to obtain a precipitate, which was synthesized by heating and pressurizing in a hydrothermal reaction kettle, the synthesis temperature was 200°C, the synthesis pressure was 20Mpa, and dried at 300°C; in a vacuum Under the condition of , the dried product was roasted at 900°C for 6 hours, and after cooling to room temperature, it was ground into a material of not less than 150 mesh;

[0040] 2) adding water to the material prepared in step 1)...

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Abstract

The invention discloses a recycling low-cost treatment method for field heavy metal polluted soil. The method comprises the following steps that firstly, biomass powder and industrial field clay mineral are evenly mixed according to the weight ratio of 1:10-25, the mixture is obtained, 10 g of the mixture is taken and placed in an anhydrous magnesium chloride solution, 150-300 mL of water is added, deposition operation is conducted, sediments are obtained, heating and pressurizing synthesis is conducted in a hydrothermal reaction kettle, the synthesis temperature is 100-200 DEG C, the synthesis pressure is 7-20 Mpa, and drying is conducted under the condition that the temperature is 200-300 DEG C; and the vacuum condition is adopted. According to the recycling low-cost treatment method forfield heavy metal polluted soil, releasing safety of heavy metal in a brick body is more stable, meanwhile, the manufactured brick body material conforms to the brick body industry standard and can serve as a building and garden roadbed brick body material, the purpose of recycling utilization of the heavy metal polluted soil is achieved, the repairing targets that secondary pollution and pollution transferring are avoided, and waste recycling utilization is achieved are achieved, and the recycling low-cost treatment method is more environment-friendly and practical.

Description

technical field [0001] The invention relates to the technical field of heavy metal pollution, in particular to a low-cost disposal method for recycling heavy metal polluted soil on site. Background technique [0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds. It is mainly caused by human factors such as mining, exhaust gas discharge, sewage irrigation and the use of heavy metal products exceeding the standard. At present, due to the mining, smelting and processing of heavy metals, many heavy metals such as lead, mercury, cadmium, cobalt, etc. enter the atmosphere and water , Soil caused serious environmental pollution. [0003] The solidification and detoxification of heavy metals has always been a difficult research point, especially for the detoxification of heavy metals in industrial site heavy metal-contaminated soils. At present, the mainstream technical idea for the disposal of heavy metal-contaminated soil on s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
Inventor 黄石光刘承帅李乐李善军黎祖然杨启豪胡松水吴广丰
Owner IRONMAN ENVIRONMENTAL TECH CO LTD
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