Heavy metal soil remediation method

A remediation method and heavy metal technology, applied in the field of soil remediation, can solve problems such as the inability to control the content of heavy metals within a reasonable range, the limited ability of plants to absorb heavy metals, and the reduction of soil quality, and achieve strong adsorption capacity, high added value, and reduced accumulation. amount of effect

Inactive Publication Date: 2020-10-09
河南省科学院地理研究所
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the methods of removing heavy metals in soil are mainly through plant adsorption, microbial degradation, chemical reagent decomposition, etc. Although plant adsorption can achieve the purpose of green adsorption of heavy metals, the ability of plants to absorb heavy metals is limited, and the metabolism of plants themselves The heavy metal content in the soil cannot be controlled within a reasonable range; the decomposition of chemical reagents can effectively remove heavy metals in the soil, but the chemistry itself will also reduce the quality of the soil and cause soil pollution again

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of restoration method of heavy metal soil, comprises following process:

[0034] 1) Surface repair: mix magnetotactic bacteria with soil with a thickness of 10 cm on the surface of the soil, and the inoculation ratio of magnetotactic bacteria is 1.0×10 8 piece / m 2 , and place a magnet on the soil surface, cultivate the magnetotactic bacteria for 20 days, then rinse the surface soil, and backfill the rinsed soil to the original place;

[0035] 2) Deep repair: Put the straw rope in the modified chitin solution, urea solution or ammonia water for 1 hour, take it out, put it in an oven to dry, and get the modified straw rope, and then bury the modified straw rope in the ground 40cm, after 15 days, take out the straw rope; wherein, the length of the modified straw rope is 1m, the diameter is 3cm, and 3 straw ropes are deeply buried per square meter of soil;

[0036] 3) soil improvement: apply soil conditioner to the soil after step 1) and 2) treatment, and the appli...

Embodiment 2

[0039] A kind of restoration method of heavy metal soil, comprises following process:

[0040] 1) Surface repair: mix magnetotactic bacteria with soil with a thickness of 15 cm on the surface of the soil, and the inoculation ratio of magnetotactic bacteria is 9.0×10 8 piece / m 2 , and place a magnet on the soil surface, cultivate the magnetotactic bacteria for 30 days, then rinse the surface soil, and backfill the rinsed soil to the original place;

[0041] 2) Deep repair: put the straw rope in the urea solution for 2 hours, take it out, put it in an oven to dry, and get the modified straw rope, then bury the modified straw rope 50cm underground, and take out the straw rope after 45 days ; Among them, the length of the modified straw rope is 1m, the diameter is 3cm, and 3 straw ropes are deeply buried per square meter of soil;

[0042] 3) soil improvement: apply soil conditioner to the soil after step 1) and 2) treatment, and the application rate of soil conditioner is 2kg / m ...

Embodiment 3

[0045] A kind of restoration method of heavy metal soil, comprises following process:

[0046] 1) Surface repair: mix magnetotactic bacteria with soil with a thickness of 12 cm on the soil surface, and the inoculation ratio of magnetotactic bacteria is 8.0×10 8 piece / m 2, and place a magnet on the soil surface, cultivate the magnetotactic bacteria for 25 days, then rinse the surface soil, and backfill the rinsed soil to the original place;

[0047] 2) Deep repair: Put the straw rope in the modified solution chitin solution, urea solution or ammonia water for 1.5h, take it out, put it in an oven to dry, and get the modified straw rope, and then bury the modified straw rope in the 45cm underground, after 30 days, take out the straw rope; among them, the length of the modified straw rope is 1m, the diameter is 3cm, and 3 straw ropes are buried deeply per square meter of soil;

[0048] 3) soil improvement: apply soil conditioner to the soil after step 1) and 2) treatment, and th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a remediation method for heavy metal soil. The method comprises the following steps: 1, mixing magnetotactic bacteria with soil with the soil surface thickness of 10-15 cm, forming a magnetic field is arranged on the soil surface, culturing that magnetotactic bacteria for 20-30 days, modifying straw ropes, burying the modified straw ropes under the ground by 40-50 cm; after15-45 days, moving out the straw ropes, adding a soil conditioner to the treated soil to remediate the soil, planting hyperaccumulator plants in the improved soil, and removing the plants two years later. According to the remediation method for the heavy metal soil, magnetotactic bacteria and modified straw ropes are used for conducting surface layer remediation and deep layer remediation on thesoil respectively, hyper-accumulation plants are used for absorbing the balance heavy metal in the soil, and the effect of deep remediation of the heavy metal soil is achieved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, and more specifically relates to a method for remediating heavy metal soil. Background technique [0002] Soil pollution is caused by too many harmful substances contained in the soil, exceeding the self-purification capacity of the soil, which causes changes in the composition, structure and function of the soil. Harmful substances gradually accumulate in the soil and are indirectly absorbed by the human body through the soil-plant-human body. The most common soil pollution is heavy metal pollution, which mainly includes elements with significant biological toxicity such as mercury, cadmium, lead, chromium and metalloid arsenic, as well as certain toxic zinc, copper, nickel, etc. element. [0003] At present, the methods of removing heavy metals in soil are mainly through plant adsorption, microbial degradation, chemical reagent decomposition, etc. Although plant adsorption can achieve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10B09C1/00
CPCB09C1/10B09C1/105
Inventor 张小磊梁少民
Owner 河南省科学院地理研究所
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap