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A method for improving the remediation effect of cadmium-contaminated soil

A technology for cadmium-contaminated soil and soil remediation, which is applied in the field of improving the remediation effect of cadmium-contaminated soil, can solve problems such as the inability of high-concentration heavy metal-contaminated soil to perform remediation, and achieve the effects of increasing soil cadmium pollution remediation efficiency and improving remediation effect.

Active Publication Date: 2020-03-03
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) Hyperaccumulative plants cannot perform the original high-efficiency restoration of heavy metal-contaminated soils

Method used

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  • A method for improving the remediation effect of cadmium-contaminated soil
  • A method for improving the remediation effect of cadmium-contaminated soil
  • A method for improving the remediation effect of cadmium-contaminated soil

Examples

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Effect test

Embodiment 1

[0034] A method for improving the remediation effect of cadmium-contaminated soil,

[0035] (1) On the cadmium-contaminated soil with a cadmium concentration greater than 0.3mg / kg, add a heavy metal activator, the heavy metal activator is livestock and poultry manure (commercial organic fertilizer, commercially available), and the amount of livestock and poultry manure is 800-1500kg / mu, turn over Plowing, then planting Sedum sedum by cuttings, cutting 200 cuttings per square meter of cadmium-contaminated soil, the length of the cuttings is 5-8cm, cultivating for 18 days, and the rooting of the cuttings is completed;

[0036] (2) Cultivate Sedum sedum southeast for 60 days under the condition of applying a direct current electric field on cadmium-contaminated soil; >99.99%) graphite electrode sheet, insert the high-purity graphite electrode sheet directly into the cadmium-contaminated soil, electrify according to the voltage gradient of 1.0v / cm, electrify for 4h every day, and ...

Embodiment 2

[0039] A method for improving the remediation effect of cadmium-contaminated soil,

[0040] (1) On the cadmium-contaminated soil with a cadmium concentration greater than 0.3mg / kg, add a heavy metal activator, the heavy metal activator is humic acid, the amount of humic acid is 200-300kg / mu, plow, and then plant Sedum sedum by cuttings , cutting 300 cuttings per square meter of cadmium-contaminated soil, the length of the cuttings is 5-8cm, cultivated for 15 days, and the rooting of the cuttings is completed;

[0041] (2) Cultivate Sedum sedum southeast for 40 days under the condition of applying a direct current electric field on the cadmium-contaminated soil; applying a direct current electric field adopts a direct current mode to realize, and the specific setting is: the power supply adopts a direct current stabilized power supply, and the electrode adopts a high-purity (carbon content >99.99%) graphite electrode sheet, insert the high-purity graphite electrode sheet direct...

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Abstract

The invention discloses a method for improving remediation effect of cadmium polluted soil. The method adopts a direct-current electric field-plant combined remediation method, so that the remediation effect of cadmium polluted soil is effectively improved, and remediation efficiency of soil cadmium pollution is improved by 20%-38%.

Description

technical field [0001] The invention relates to a soil remediation method, in particular to a method for improving the remediation effect of cadmium-contaminated soil. Background technique [0002] According to the report of the 2014 National Soil Pollution Survey Bulletin, the total soil exceeding the standard rate in the country is 16.1%, and the pollution type is mainly inorganic, accounting for 82.8% of the total exceeding points. In the case of inorganic pollutants exceeding the standard, eight kinds of cadmium, nickel, mercury, arsenic, copper, lead, chromium, and zinc exceeded the standard seriously. Among them, the pollution of heavy metal cadmium is the highest, and the rate of point exceeding the standard is as high as 7%, and it is increasing year by year. Once the soil environment is polluted by cadmium, the activity of soil microorganisms will be reduced, which will affect the yield and quality of crops, and enter the human body or animals through the food chai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08B09C1/00
CPCB09C1/085B09C1/105
Inventor 叶雪珠肖文丹王京文蒋玉根张棋张永志李丹顾万帆孙彩霞徐萍
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES