Method for restoring soil with heavy metal pollution

A technology for soil and heavy metal remediation, applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., to achieve the effect of improving the ability to adsorb heavy metal ions and reducing enrichment

Inactive Publication Date: 2018-05-29
台州泰捷化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other commonly used soil remediation agents also include lime and phosphate, but there are certain limitations in their use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Modification of Montmorillonite

[0029] Take 2kg of natural montmorillonite powder, remove impurities through preliminary sieving, place it in a 10L bucket, add water to make a suspension, place it in a cool place at room temperature, use a stirrer to physically stir for 24 hours to swell; take 10g of polyvinyl alcohol, After melting at high temperature, put it in hot water, raise the temperature of the aforementioned suspension to 50-70°C, add the hot solution containing polyvinyl alcohol into the montmorillonite suspension, and then add 10g Na 2 CO 3 , continue to stir for 1 day; centrifuge the suspension obtained above in batches, the speed of the centrifuge is 1200r / min, discard the supernatant, transfer the montmorillonite to a tray, and dry it at room temperature to obtain the modified montmorillonite Soil 1.

Embodiment 2

[0031] Get 2kg of natural montmorillonite powder, remove impurities through preliminary sieving, place in a 10L bucket, add water to make a suspension, place in a cool place at room temperature, use a stirrer to physically stir for 24 hours to swell; take stearic acid 10g, Use ethanol to dissolve, add the ethanol solution containing stearic acid to the montmorillonite suspension, and then add 10gNa 2 CO 3 , continue to stir for 1 day; centrifuge the suspension obtained above in batches, the speed of the centrifuge is 1200r / min, discard the supernatant, transfer the montmorillonite to a tray, and dry it at room temperature to obtain the modified montmorillonite Soil 2.

Embodiment 3

[0033] Preparation of heavy metal soil remediation agent

[0034] Get prepared modified montmorillonite 50g, plant ash 20g, biochar 40g, organic fertilizer 50g, apatite 20g, β-cyclodextrin 3g, sodium alginate 3g, lime powder 20g, firstly the modified montmorillonite Stir with biochar and organic fertilizer using a mechanical stirrer for 5 minutes, then add plant ash, apatite and lime powder in sequence, and stir for 5 minutes, and finally add additives β-cyclodextrin and sodium alginate, and stir evenly to obtain heavy metal restoration agent 1 .

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PUM

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Abstract

The invention relates to a method for restoring soil with heavy metal pollution. According to the method, a restoring agent is adopted for restoring, the restoring agent contains modified montmorillonite, the modified montmorillonite adopts natural montmorillonite, and the soil restoring agent is obtained after the montmorillonite is modified through inorganic salt and organic matter and then composited with other components. The soil restoring agent has the characteristics that raw materials are easy to obtain, the cost is low, and the effect on adsorbing heavy metal is good, is especially suitable for restoring the soil immersed by industrial sewage, and has good adsorption removal effect on common heavy metal ions such as chromium, copper, zinc, cadmium and lead in the soil. The soil restoring agent is simple in preparation method, high in repeatability and suitable for mass production.

Description

technical field [0001] The invention relates to a heavy metal soil restoration agent, in particular to the preparation of modified montmorillonite and the preparation of the soil restoration agent. Background technique [0002] With the progress of society and the development of modern industry and agriculture, human beings have more and more far-reaching influence on the natural environment. From agricultural chemical fertilizers, pesticides, genetically modified organisms, to industrial "three wastes", as well as sewage and garbage in daily life, to space debris in national defense and aerospace industries, they all affect nature and cause various environmental problems. Among them, the problem of heavy metal pollution is more prominent. Heavy metal pollution in soil refers to the introduction of heavy metals in the soil due to human activities, making the content of heavy metals in the soil much higher than the background value of heavy metals in the soil, which eventual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08C09K17/40C09K101/00
CPCB09C1/08B09C2101/00C09K17/40C09K2101/00
Inventor 金建德
Owner 台州泰捷化工科技有限公司
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