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Method for treating cadmium-contaminated soil

A technology for cadmium-contaminated soil and treatment methods, which is applied in the field of heavy metal pollution control, can solve problems such as low technical efficiency, and achieve the effects of convenient field management, high restoration efficiency, and good restoration effect

Inactive Publication Date: 2019-07-30
湖南双晟科技信息咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problem of low technical efficiency of phytoremediation of heavy metal cadmium-contaminated soil, the present invention provides a treatment method for cadmium-contaminated soil, which has good remediation effect on cadmium-contaminated soil, high remediation efficiency, and will not cause secondary Pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for treating soil contaminated by cadmium includes the following steps:

[0017] S1. Apply a proper amount of remediation agent to the soil contaminated by cadmium, then trim, break and dry for 5 days; the depth of the trim is 20cm, and the size is 1~3cm;

[0018] The added amount of the repairing agent is 150kg / mu, and it is made by mixing the following parts by weight of raw materials: 40 parts of fly ash, 20 parts of livestock and poultry manure, 8 parts of humic acid, 15 parts of mixed bacteria, and ethylenediamine 3 parts tetraacetic acid, 0.2 parts manganese sulfate, 0.3 parts zinc sulfate, 0.1 parts molybdenum sulfate, 10 parts urea, 10 parts superphosphate, 10 parts slow-release fertilizer;

[0019] The mixed inoculum is made by mixing Bacillus subtilis and Bacillus glia in a ratio of 3:1 by weight;

[0020] S 2. Sown amaranth in the cadmium-contaminated soil treated with S1, and remove the whole crop from the cadmium-contaminated soil after the amaranth mature...

Embodiment 2

[0024] A method for treating soil contaminated by cadmium includes the following steps:

[0025] S1. Apply an appropriate amount of remediation agent to the soil contaminated by cadmium, then trim, break and dry for 6 days; the depth of trimming is 25cm, and the particle size is 1~3cm;

[0026] The added amount of the repairing agent is 170kg / mu, and it is made by mixing the following parts by weight of raw materials: 50 parts of fly ash, 25 parts of livestock and poultry manure, 9 parts of humic acid, 17 parts of mixed bacterial agents, ethylenediamine 5 parts of tetraacetic acid, 0.3 parts of manganese sulfate, 0.4 parts of zinc sulfate, 0.2 parts of molybdenum sulfate, 13 parts of urea, 13 parts of superphosphate, 15 parts of slow-release fertilizer;

[0027] The mixed inoculum is made by mixing Bacillus subtilis and Bacillus glia in a ratio of 3:1 by weight;

[0028] S 2. Sown amaranth in the cadmium-contaminated soil treated with S1, and remove the whole crop from the cadmium-con...

Embodiment 3

[0032] A method for treating soil contaminated by cadmium includes the following steps:

[0033] S1. Apply an appropriate amount of remediation agent to cadmium-contaminated soil, then trim, break and dry for 7 days; the depth of trimming is 30cm, and the particle size is 1~3cm;

[0034] The added amount of the repairing agent is 200kg / mu, and it is made by mixing the following parts by weight of raw materials: 60 parts of fly ash, 30 parts of livestock and poultry manure, 10 parts of humic acid, 20 parts of mixed bacterial agents, ethylene diamine 6 parts of tetraacetic acid, 0.5 parts of manganese sulfate, 0.5 parts of zinc sulfate, 0.3 parts of molybdenum sulfate, 15 parts of urea, 15 parts of superphosphate, 20 parts of slow-release fertilizer;

[0035] The mixed inoculum is made by mixing Bacillus subtilis and Bacillus glia in a ratio of 3:1 by weight;

[0036] S 2. Sown amaranth in the cadmium-contaminated soil treated with S1, and remove the whole crop from the cadmium-contamin...

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Abstract

The invention discloses a method for treating cadmium-contaminated soil. The method for treating the cadmium-contaminated soil comprises the following steps of applying an appropriate quantity of a remediation agent to the cadmium-contaminated soil, then conducting ploughing and crushing, and air-drying the soil for 5-7 days; sowing amaranths in the cadmium-contaminated soil, and after the amaranths ripe, removing whole crops from the cadmium-contaminated soil for harmless treatment; repeating the operation until the cadmium-contaminated soil is remediated to meet standards of grain production. The method for treating the cadmium-contaminated soil has the advantages that the remediation effect on the cadmium-contaminated soil is good, the remediation efficiency is high, and no secondary contamination is caused.

Description

Technical field [0001] The invention relates to the technical field of heavy metal pollution treatment, and in particular to a method for treating soil contaminated by cadmium. Background technique [0002] Since the reform and opening up, my country’s economy has developed rapidly, and it has also brought about a large number of environmental problems. The discharge of industrial solid waste, irrigation of polluted wastewater, unreasonable application of pesticides and fertilizers, and atmospheric deposition will all cause a large amount of heavy metals to enter. In the soil, it seriously threatens the soil ecological environment and human health. [0003] Existing technologies for remediation of heavy metal cadmium contaminated soil include physical remediation and chemical remediation. The physical repair technology mainly repairs the soil through soil modification method, electric method and thermal desorption method. Chemical remediation technology mainly includes chemical cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
CPCB09C1/00B09C1/10B09C1/105B09C2101/00
Inventor 戈捷
Owner 湖南双晟科技信息咨询有限公司
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