Treatment method for heavy metal contaminated soil

A technology of polluted soil and treatment methods, applied in the restoration of polluted soil, etc., can solve the problems of soil loss of use value, difficult to popularize and apply, high one-time investment, etc., to increase and update soil organic matter, low price, and reduce absorption Effect

Inactive Publication Date: 2015-01-07
GUANGXI SOURCE OF THE FERTILIZER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heavy metal pollution is different from organic pollution. Heavy metals themselves are difficult to degrade. Heavy metals entering the soil cannot be decomposed by microorganisms and accumulate in the soil for a long time. Some of them are absorbed by crops and eventually enter the human body through the food chain. There are certain ecological risks. Heavy metals are easy to be enriched by plants or animals. At present, the area of ​​cultivated land polluted by heavy metals such as lead, cadmium, and mercury in my country is nearly 10 million hectares, accounting for about 1/5 of the total cultivated land area, and the amount of grain polluted by heavy metals reaches as many as 10 million every year. tons, resulting in huge economic losses
At present, the commonly used soil heavy metal pollution treatment adopts agr...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The treatment agent of the present embodiment includes: 30 parts of sepiolite group minerals; 10 parts of plant organic fertilizer additives, 30 parts of seaweed, after the sepiolite group minerals are air-dried, grind them into granules with a grinder, and pass through a 1000-1500 mesh sieve , the seaweed is dried and crushed into powder and mixed with sepiolite mineral particles; plant organic fertilizer additives are licorice, rice bran, and silkworm excrement soaked in boiling water for 6 hours and then placed in a cool place for 20-30 minutes. Yeast and oligosaccharides are fermented. After 30 days of fermentation, sour taste is formed, and the fermented liquid is filtered out. The ratio of licorice, rice bran and silkworm excrement is 1:1:2, and the weight of oligosaccharides added is 1% of the total weight of licorice, rice bran, and silkworm excrement. 10%, the added dry yeast weight is 15% of the total weight of licorice, rice bran and silkworm excrement, and th...

Embodiment 2

[0026] This embodiment is made of raw materials in parts by weight: 40 parts of sepiolite group minerals; 20 parts of plant organic fertilizer additives, 40 parts of seaweed, after the sepiolite group minerals are air-dried and dried, grind them into granules with a grinder, and pass 1000-1500 parts. Mesh sieve, dry the seaweed, crush it into powder and mix it with sepiolite mineral particles to form a powder; plant organic fertilizer additives use licorice, rice bran, silkworm excrement, soak in boiling water for 6 hours, put it in a cool place and let it stand for 20-30 minutes , put in dry yeast and oligosaccharides for fermentation, after 30 days of fermentation time, a sour taste is formed, and the fermented liquid is filtered out to obtain an aqueous solution. The ratio of licorice, rice bran and silkworm excrement is 1:1:2, and the weight of oligosaccharides added is licorice, 10% of the total weight of rice bran and silkworm excrement, the added dry yeast weight is 15% ...

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PUM

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Abstract

The invention discloses a treatment method for heavy metal contaminated soil, relating to the technical field of contaminated soil recovery. The treatment method comprises the following steps: (A) crushing to-be-treated contaminated soil; and (B) scattering a powder agent in a heavy mental soil treatment agent into the to-be-treated contaminated soil in the step (A), and spraying a water agent in the heavy mental soil treatment agent until the soil is drenched after the crushed soil and the powder agent is mixed uniformly, wherein the weight ratio of the applied heavy mental soil treatment agent to the contaminated soil is 1 to (5-6). The heavy metal contaminated soil is treated by virtue of the treatment method, so that the content of heavy metal in the soil can be rapidly decreased, the soil structure is changed, and the propagation of microorganisms is increased.

Description

technical field [0001] The invention relates to the technical field of remediation of polluted soil, in particular to a treatment method for heavy metal polluted soil. Background technique [0002] Soil is one of the main natural resources that human beings rely on for survival, and it is also an important part of the human ecological environment. With the rapid development of industry and mining, soil heavy metal pollution is becoming more and more serious. Heavy metals refer to metals with a density greater than 4 (g / cm3), which mostly exist in the form of compounds in nature. With the mining, smelting, processing and mulberry leaf manufacturing of heavy metals, many heavy metals such as lead, cadmium, mercury, etc. Into the atmosphere, water or soil, causing serious heavy metal pollution. Soil is an important natural resource for human survival and development. Heavy metal pollution in soil will directly affect human health and the entire terrestrial ecosystem. Heavy me...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 陈作军王修海
Owner GUANGXI SOURCE OF THE FERTILIZER IND
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