Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Remediation method and device for heavy metal polluted soil based on leaf exocrine mechanism

A technology of heavy metals and leaves, applied in the field of remediation of heavy metal environmental pollution, can solve the problems of difficult treatment, high risk of secondary pollution, secondary pollution of the surrounding environment, etc., and achieves reduction of toxicity, difficulty in secondary pollution, and simple recovery and disposal. Effect

Active Publication Date: 2020-03-17
SHANGHAI JIAOTONG UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since heavy metal pollutants such as cadmium, lead, and chromium have strong physiological toxicity to plants, the tolerance of plants to heavy metals is very limited, and when a certain concentration is reached, the plants will fail and die. The phytoremediation technology established by the enrichment mechanism of plants has the following defects: 1) It can only remediate the low-concentration heavy metal-contaminated soil that some plants can tolerate, and the high-concentration pollution in pollution source areas such as tailings and chemical factories The soil is powerless and has great limitations; 2) the post-treatment of the harvested plants is difficult, because the heavy metal content of the plant body enrichment is low, and the harvested plant body is huge, generally every hectare enriches the biological content of the plant every season. The amount can reach 10,000 to 100,000 kilograms, which cannot be disposed of directly in landfill. It needs to be incinerated and concentrated before it can be disposed of through recycling or landfill. The drying and incineration of plants require a very large treatment site and large Only a large amount of investment can be realized, which seriously restricts the feasibility of phytoremediation technology; 3) The risk of secondary pollution is high, and every step of harvesting, drying, incineration, and ash treatment of plants enriched in heavy metals is difficult in a completely closed environment. Once it spreads, it will cause secondary pollution to the surrounding environment

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Remediation method and device for heavy metal polluted soil based on leaf exocrine mechanism
  • Remediation method and device for heavy metal polluted soil based on leaf exocrine mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like figure 1 As shown, the present embodiment relates to a heavy metal eluent collection device comprising: a eluate collection disk 2 set at the base of the plant, a eluate collection port 3 provided at the bottom of the collection disk 2, and a eluate collection port 3 located at the base of the plant. The eluent storage tank 4 under the collection port 3.

[0025] The eluent collection disk 2 is surrounded by an inclination angle of 10-40°, which can smoothly gather the eluent to the eluent collection port 3 at the bottom and flow into the eluent storage tank 4 .

[0026] The eluent collection disk 2 is fixed on the base of the plant, so that the root system of the plant can grow out from the opening in the middle of the disk unhindered and take root in the soil; the eluent collection disk 2 The opening in the center matches the size of the base of the grown plant, and the stems and leaves at the base of the plant can completely block the opening in the middle of t...

Embodiment 2

[0035] In this example, based on the above method and device, Poa annua exocytosis is used to restore heavy metal cadmium-contaminated soil. The specific process is as follows:

[0036] In the soil with a cadmium concentration of 50mg / kg, the bluegrass plants were transplanted in September, and each bluegrass base was covered with a eluent collection device, and the bluegrass plants were collected from the leachate in the middle of the disc. The opening passes through, the stems and leaves are located above the eluent collection disc, the root system is located below the eluent collection disc, and the size of the base of the bluegrass plant matches the size of the opening in the middle of the eluent collection disc. The planting distance between bluegrass and bluegrass is 50mm×150mm. When the plant grows, the root system can absorb heavy metal cadmium pollution from the soil, and transport it to the leaves on the ground, and secrete it to the surface of the leaves through the...

Embodiment 3

[0038] In this example, based on the above method and device, tall fescue exocytosis is used to remediate heavy metal compound polluted soil. The specific process is as follows:

[0039] The soil to be tested is heavy metal complex polluted soil, in which the concentration of lead pollution is 257.5mg / kg, the concentration of cadmium pollution is 34.0mg / kg, the concentration of copper pollution is 1470.5mg / kg, and the concentration of zinc pollution is 1037.2mg / kg. Plant tall fescue plants, each tall fescue base is covered with a eluent collection device, the tall fescue plants pass through the opening in the middle of the eluent collection disc, and the stems and leaves are located in the eluent collection disc above, the root system is located below the eluate collection disc, and the size of the base of the tall fescue plant matches the size of the opening in the middle of the eluate collection disc. The planting row spacing of tall fescue is 200mm×300mm. When the plant grow...

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 repair method of heavy metal polluted soil based on a blade eccrine mechanism. Heavy metal enrichment plants with a blade eccrine function are planted in the heavy metal polluted soil; leaching liquid collecting devices are arranged at base parts of all the heavy metal enrichment plants with the eccrine function; during raining or leaching, blade eccrine heavy metal is leached, and is recovered through the leaching liquid collecting devices; and the leaching liquid collecting devices comprise leaching liquid collecting discs sleeving the base parts of the plants, leaching liquid collecting ports formed in the bottoms of the collecting discs, and leaching liquid storage barrels positioned below the leaching liquid collecting ports. Heavy metal pollutants can be continuously extracted from the soil to prevent poison and harm caused by excessive accumulation of the heavy metal in the plants; and heavy metal cleaning liquid is simply treated after concentration, so that the trouble of treating a lot of plant residues is prevented, and the risk of secondary pollution is prevented.

Description

technical field [0001] The invention belongs to the technical field of remediation of heavy metal environmental pollution, and in particular relates to a method and a device for remediating heavy metal-polluted soil by using a special plant with the function of leaf exuding heavy metals. Background technique [0002] Soil heavy metal pollution has become a very serious and global environmental problem. The phytoremediation technology of heavy metal pollution mainly relies on plants with the ability to enrich or super-accumulate various heavy metals, using plant roots to absorb heavy metal pollutants in the soil, and transport them to the stems and leaves of the aboveground parts, so that the heavy metals in the soil Gradually enriched in the roots, stems and leaves of plants, and the purpose of removing heavy metal pollutants in the soil is achieved by harvesting the plants. Since heavy metal pollutants such as cadmium, lead, and chromium have strong physiological toxicity ...

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 Patents(China)
IPC IPC(8): B09C1/00B09C1/02
CPCB09C1/02B09C1/105B09C2101/00
Inventor 王兆龙董沁费凌曹军军胡帅李笑笑王舒婷
Owner SHANGHAI JIAOTONG UNIV
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
Eureka Blog
Learn More
PatSnap group products