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Method for restoring mercury pollution through biochemical joint

A combined remediation and mercury pollution technology, applied in the field of soil pollution remediation, can solve the problems of soil mercury pollution and single treatment method, and achieve the effects of no soil pollution, improved enrichment and absorption, and improved overall remediation efficiency.

Active Publication Date: 2018-08-24
HUNAN JINLV ENVIRONMENTAL PROTECTION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, there is a need for a technology that can solve the problems of serious mercury pollution in farmland soil, single treatment method and subsequent release

Method used

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  • Method for restoring mercury pollution through biochemical joint
  • Method for restoring mercury pollution through biochemical joint
  • Method for restoring mercury pollution through biochemical joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, 1. select suitable planting area and euphorbia variety. According to the previous test, the highest mercury content in the soil of the planting area is 3-4mg / kg. At the same time, the same plot was selected for comparison, no soil conditioner was added, and the rest of the test steps were the same.

[0027] 2. Plow and fertilize the soil before sowing. Fertilization is mainly based on base fertilizer, and the amount of fertilizer applied is: 2000-2500kg / mu of organic fertilizer per mu.

[0028] 3. Sow wheat seeds on the plowed land and apply soil conditioner.

[0029] (1) Sowing is carried out by drill sowing, and the seeding rate is determined according to the actual situation.

[0030] (2) About 15 to 20 days after seedlings, apply the prepared soil conditioner to the soil (proportional composition: 30 to 40 parts, ferric oxide: 20 to 30 parts, activated carbon: 30 to 40 parts; kaolin 15-30 parts), the addition amount per mu is 150-375 kg, and waterin...

Embodiment 2

[0033] Example 2, the weight ratio of each component in the soil conditioner used for repairing mercury-contaminated farmland according to the present invention is manganese dioxide: ferric oxide: activated carbon: kaolin = 40:20:30:10.

[0034] According to the requirements of the patent, at first on the land after plowing, sowing of euphorbia seeds is carried out. About 15 to 20 days after emergence, add soil conditioner to the soil. In order to illustrate the actual application effect of this example, the soil conditioner configured in this example was added to the polluted soil, and the soil conditioner was thoroughly mixed with the polluted soil by plowing. Every mu adds the soil conditioner of 200kg present embodiment, and the treatment effect of pH and mercury in the soil is as follows:

[0035]

Embodiment 3

[0036] Example 3, the weight ratio of each component in the soil conditioner used for repairing mercury-contaminated farmland according to the present invention is manganese dioxide: ferric oxide: activated carbon: kaolin = 25:25:40:10.

[0037] According to the requirements of the patent, at first on the land after plowing, sowing of euphorbia seeds is carried out. About 15 to 20 days after emergence, add soil conditioner to the soil. In order to illustrate the actual application effect of this example, the soil conditioner configured in this example was added to the polluted soil, and the soil conditioner was thoroughly mixed with the polluted soil by plowing. Every mu adds the soil conditioner of 150kg present embodiment, and the treatment effect of pH and mercury in the soil is as follows:

[0038]

[0039]

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Abstract

The invention discloses a method for restoring mercury pollution through biochemical joint. The method comprises the following steps that 1, the radix morindae officinalis seeds are sown in the soil polluted by the mercury to be repaired; 2, the soil conditioner is fully and uniformly mixed; step 3, the soil conditioner which is uniformly mixed is applied to soil around the root of the euphorbia pekinensis; and 4, the radix morindae officinalis are harvested in the ripening stage of the euphorbia pekinensis. The method has the advantages that the content of mercury in the soil can be effectively reduced, the plant root system is promoted to absorb mercury from the soil and transfer the mercury to the overground part of the plant, the overall repair efficiency and range are effectively improved, the cost is low, the operation is simple, the material selection is convenient, no secondary damage is caused to the soil, and potential economic benefits can be brought.

Description

technical field [0001] The invention relates to the field of soil pollution remediation, in particular to a biochemical combined method for remediating mercury pollution. Background technique [0002] At present, the total detectable mercury storage in the world is about 127,600 tons, of which China's storage is about 80,000 tons, the global production is about 8,000 tons, but the global emissions reach nearly 3,000 tons. Obviously, China is one of the countries with the largest mercury emissions in the world. The areas seriously polluted by mercury in my country are mainly concentrated in Guizhou, Jilin, Liaoning, Shaanxi, Hubei and Chongqing. With the development of society and the process of industrialization, the pollution of soil heavy metals has become more and more serious. Mercury pollution has strong carcinogenicity, teratogenicity, persistent neurotoxicity, genotoxicity and bioaccumulation effects. Mercury and its compounds are very harmful to humans, animals and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
CPCB09C1/08B09C1/105B09C2101/00
Inventor 张剑锋廖凯强黄放魏勇红刘苗苗刘琳
Owner HUNAN JINLV ENVIRONMENTAL PROTECTION CO LTD
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