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Soil heavy metal passivator

A heavy metal passivator and soil technology, applied in the field of soil remediation, can solve problems such as heavy metal pollution, achieve the effect of protecting the environment and safety, simple ingredients, and avoiding incineration

Inactive Publication Date: 2020-06-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current physical heavy metal passivation agents are all aimed at the passivation of heavy metals in a medium such as compost or soil. Considering the problem of heavy metal pollution in both organic fertilizers and soil, screening for heavy metal passivation effects on both compost and soil heavy metal passivation chemical agent, which can provide stronger support for effective control of soil pollution

Method used

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  • Soil heavy metal passivator

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preparation example Construction

[0026] 90-100 parts of modified straw charcoal, 8-12 parts of biological humic acid, 10-15 parts of calcium carbonate, 5-8 parts of dolomite, and 3-6 parts of potassium feldspar. The preparation method of the modified straw charcoal comprises the following steps: (1) drying the straw until the water content is not more than 20%, and then cutting the straw, and the length of the control section is not more than 5cm; (2) drying the straw after cutting put the straw into the steam explosion device, and then carry out steam explosion treatment on the straw, and take it out for use after completion; (3) immerse the straw after steam explosion treatment in the modification treatment liquid, and take it out for use after ultrasonic treatment for 35-45 minutes; (4) Put the straw treated in step (3) into a carbonization box for high-temperature carbonization treatment, take it out after 1-1.5 hours, and finally pulverize it.

[0027] The particle sizes of the calcium carbonate, dolomit...

Embodiment 1

[0034] A kind of soil heavy metal deactivator, is made up of following material of corresponding weight part:

[0035] 90 parts of modified straw charcoal, 8 parts of biological humic acid, 10 parts of calcium carbonate, 5 parts of dolomite, and 3 parts of potassium feldspar. The preparation method of the modified straw charcoal comprises the following steps: (1) drying the straw until the water content is not more than 20%, and then cutting the straw, and the length of the control section is not more than 5cm; (2) drying the straw after cutting put the straw into the steam explosion device, and then carry out steam explosion treatment on the straw, and take it out for later use; (3) immerse the straw after steam explosion treatment in the modification treatment solution, and take it out for later use after ultrasonic treatment for 35 minutes; (4) ) putting the straw treated in step (3) into a carbonization box for high-temperature carbonization treatment, taking it out after ...

Embodiment 2

[0043] A kind of soil heavy metal deactivator, is made up of following material of corresponding weight part:

[0044] 95 parts of modified straw charcoal, 10 parts of biological humic acid, 13 parts of calcium carbonate, 7 parts of dolomite, and 5 parts of potassium feldspar. The preparation method of the modified straw charcoal comprises the following steps: (1) drying the straw until the water content is not more than 20%, and then cutting the straw, and the length of the control section is not more than 5cm; (2) drying the straw after cutting put the straw into the steam explosion device, and then carry out steam explosion treatment on the straw, and take it out for later use; (3) immerse the straw after steam explosion treatment in the modification treatment solution, and take it out for later use after ultrasonic treatment for 40 minutes; (4) ) put the straw treated in step (3) into the carbonization box for high-temperature carbonization treatment, take it out after 1.3...

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Abstract

The invention discloses a soil heavy metal passivator, and relates to the technical field of soil remediation, and the soil heavy metal passivator is composed of the following substances in parts by weight: 90-100 parts of modified straw carbon, 8-12 parts of biological humic acid, 10-15 parts of calcium carbonate, 5-8 parts of dolomite and 3-6 parts of potassium feldspar. The soil heavy metal passivator provided by the invention has the advantages that the used components are simple, the cost is low, meanwhile, a large amount of straw resources are fully utilized in the raw materials, the straw incineration is avoided, and the environmental safety is protected; the passivator can significantly improve the passivating effect on heavy metals in soil, and is beneficial to restoration and improvement of soil texture.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a soil heavy metal passivator. Background technique [0002] Statistical analysis of some heavy metal content in farmland soil in 8 regions of my country showed that the heavy metal content in most areas was higher than the background value of the soil environment. For 24 provinces and cities across the country, 320 seriously polluted areas, about 548×104hm 2 The land survey shows that excessive heavy metals in agricultural products is the main problem of excessive pollutants in agricultural products. In 2006, my country carried out sampling tests on farmland protection areas, and the excess rate of heavy metals in the sampling samples was as high as 12.1%. The analysis results of soil samples in Beijing (2005-2009) for five consecutive years showed that the soil was polluted by Cd, Pb and Hg to varying degrees. In agricultural activities, livestock and poultry manure...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00
Inventor 何赢
Owner SHANGHAI UNIV
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