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Cadmium contaminated mine soil remediation agent as well as preparation and application method thereof

A soil remediation agent, cadmium pollution technology, applied in the restoration, application, soil conditioning materials and other directions of polluted soil, can solve problems such as difficulty in soil remediation, achieve low cost, strong adsorption capacity, and solve the effect of physiological drought

Inactive Publication Date: 2018-11-27
SHENZHEN WENKE GARDENING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention belongs to the field of heavy metal soil restoration, and in particular relates to a restoration agent for cadmium-contaminated mine soil and its preparation and application method, so as to overcome the difficult problem of restoration of cadmium-contaminated mine soil at the present stage

Method used

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  • Cadmium contaminated mine soil remediation agent as well as preparation and application method thereof
  • Cadmium contaminated mine soil remediation agent as well as preparation and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] Prepare the remediation agent for cadmium polluted mine soil according to the following steps:

[0035] Step 1: Preparation of modified clay minerals: Mix attapulgite, diatomaceous earth, and sepiolite in a ratio of 3:2:1, crush to 100 mesh, calcinate at 350°C for 1.5h, cool, and grind into particles or powder form.

[0036] Step 2: Preparation of organic fertilizer: use the fallen leaves of Pinghu Ecological Garden as the main raw material, add a mixture of chicken manure and pig manure at a ratio of 2:3, and inoculate the mixed bacteria solution including Bacillus, actinomycetes, yeast and lactic acid bacteria , used after 5d fermentation.

[0037] Step 3: Preparation of biochar: rice straw was used as raw material, pyrolyzed at 600°C, kept for 3 hours, cooled to room temperature, ground, and passed through a 100-mesh sieve.

[0038] Step 4: Evenly mix the modified clay mineral, quicklime, organic fertilizer, biochar, and polyglutamic acid at a ratio of 15:30:30:20:...

example 2

[0040] Prepare the remediation agent for cadmium polluted mine soil according to the following steps:

[0041] Step 1: Preparation of modified clay minerals: Mix attapulgite, diatomaceous earth, and sepiolite at a ratio of 4:2:3, crush to 100 mesh, calcinate at 400°C for 2 hours, cool, and grind into granules or powder shape.

[0042] Step 2: Preparation of organic fertilizer: use the shrubs and branches of Pinghu Ecological Garden as the main raw material, add a mixture of chicken manure and pig manure at a ratio of 1:5, and inoculate the mixture of Bacillus, actinomycetes, yeast and Trichoderma Bacterial solution, used after 7 days of fermentation.

[0043] Step 3: Preparation of biochar: rice straw was used as raw material, pyrolyzed at 600°C, kept for 3 hours, cooled to room temperature, ground, and passed through a 100-mesh sieve.

[0044] Step 4: Evenly mix the modified clay mineral, quicklime, organic fertilizer, biochar, and polyaspartic acid at the ratio of 20:24:35...

example 3

[0046] Prepare the remediation agent of cadmium polluted mine soil according to the following steps:

[0047] Step 1: Preparation of modified clay minerals: Mix attapulgite, sodium bentonite, and zeolite at a ratio of 5:3:2, crush to 100 mesh, calcinate at 350°C for 1.5h, cool, and grind into granules or powder .

[0048] Step 2: Preparation of organic fertilizer: use the fallen leaves of Pinghu Ecological Garden as the main raw material, add a mixture of chicken manure and pig manure at a ratio of 2:3, and inoculate the mixed bacteria solution including Bacillus, actinomycetes, yeast and lactic acid bacteria , used after 5d fermentation.

[0049] Step 3: Preparation of biochar: use corn stalks as raw materials, pyrolyze at 600°C, keep warm for 3 hours, cool to room temperature, grind, and pass through a 100-mesh sieve.

[0050] Step 4: Evenly mix the modified clay mineral, quicklime, organic fertilizer, biochar, and polymerized amino acid (1:1 mixture of polyaspartic acid a...

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Abstract

The invention provides a cadmium contaminated mine soil remediation agent as well as preparation and application methods thereof. The remediation agent contains the following components in parts by weight: 15-30 parts of modified clay minerals, 20-35 parts of quick lime, 30-45 parts of organic fertilizers, 15-30 parts of charcoal and 1-5 parts of polymerized high molecular compounds. The preparation method of the remediation agent comprises the following steps: grinding and crushing clay minerals to 100 meshes, calcining at a high temperature, cooling, and grinding into granules or powder; taking forestry and agricultural residues as main raw materials, adding feces of livestock and poultry, externally inoculating a source inoculant, and fermenting by 5-15 days; taking crop straws as raw materials, performing high temperature pyrolysis, cooling to the room temperature, grinding, and passing through a 100-mesh sieve; and finally, uniformly mixing the modified clay minerals, quick lime,organic fertilizers, charcoal and polymerized high molecular compounds according to a certain ratio. The cadmium contaminated mine soil remediation agent is applied at a dose of 1-2 tonnages per mu, can achieve effects of effectively reducing the available cadmium in mine soil, regulating the pH value and ensuring normal growth of mine vegetation, and has great significance for restoring the minevegetation.

Description

Technical field: [0001] The invention belongs to the field of soil heavy metal restoration, and in particular relates to a restoration agent for cadmium-contaminated mine soil and its preparation and application method Background technique: [0002] Mineral resources are the material basis for human survival and development, and an important pillar for human survival and social and economic development. However, because my country's mineral resources development technology is generally not advanced, coupled with long-term disorderly mining, economic benefits rather than protection, mining not only changes the original landscape ecological environment, but also leads to ecological degradation and environmental pollution in mining areas. The heavy metal pollution in abandoned mines has a particularly serious impact on the surrounding environment, especially during the mining and utilization of abandoned metal mines, even after the mine is stopped or closed, a large amount of h...

Claims

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Application Information

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IPC IPC(8): B09C1/08C09K17/40C09K101/00
CPCB09C1/08B09C2101/00C09K17/40C09K2101/00
Inventor 田雪周文君张正蕊任娜娜王序驰王业春曹华英陈嘉健李军娟宫彦章
Owner SHENZHEN WENKE GARDENING IND
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