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Plant restoration method for heavy metal pollution of soil

A phytoremediation and heavy metal technology, applied in the field of environmental pollution control, can solve the problems of food chain pollution, time-consuming, slow growth, etc., achieve the effect of no secondary pollution and improve the efficiency of plant extraction

Inactive Publication Date: 2005-03-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical effect that this new technology solves are its ability to combine phytoextraction (phytonema) from plants with use of specific types of microorganisms called Rhizotrophic Bacteroid Adenocystis). This improves both extracting high concentrations of harmful elements like lead or mercury into their own cells while also reducing environmental impacts caused by these substances during landfill disposal processes.

Problems solved by technology

Technical Problem addressed in this patented technical problem is how to efficiently remove heavy metallates from sediments without causing damage to sensitive areas around them while maintaining beneficial environments near ground levels where heavy metalls could exist. Existing solutions involve expensive processes involving laborious procedures and materials derived from natural resources, leading to reduced benefits over long periods of cultivations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Cadmium and lead in the soil extracted from the small flying grass

[0031] (1) Small flying grass breeding

[0032]Seeds are used to germinate small flying grass. First, vernalize at a low temperature of 2°C for about 65 hours, and then control the temperature at about 25°C and the humidity at about 80% to germinate in a greenhouse.

[0033] (2) planting and growth of plants

[0034] Sow germinated seeds of small flying grass, about 100 seeds per m 2 . Planted in moist soil and covered with soil, it can be planted at an ambient temperature of 10°C in South China. Plants can grow in soil polluted with cadmium 10-200mg / kg and lead 400-3000mg / kg, and accumulate and extract heavy metals.

[0035] (3) Plant harvesting and post-processing

[0036] After the completion of vegetative growth (about 60 days), the whole plant should be pulled out; the post-treatment of plant residues (incineration and landfill or recovery of heavy metals) should be done to prevent...

Embodiment 2

[0046] Example 2 Wild ramie extracts cadmium and lead in soil

[0047] (1) Ramie breeding

[0048] Ramie is propagated with rhizomes, and the seedlings are cultivated at a temperature of about 35°C and a humidity of about 80%.

[0049] (2) Planting and growth of ramie

[0050] Ramie transplanted seedlings, 10 per m 2 . Planted in moist soil and covered with soil, it can be planted at an ambient temperature of 35°C in South China. Plants can grow in soil polluted with cadmium 10-200mg / kg and lead 400-3000mg / kg, and accumulate and extract heavy metals.

[0051] (3) Harvesting and post-processing of ramie

[0052] After the ramie has completed its vegetative growth (about 90 days), the aerial part is harvested. Do a good job in the post-treatment of plant residues (incineration and landfill or recovery of heavy metals) to prevent secondary pollution.

[0053] (4) The specific indicators are as follows

[0054] Pollution depth: D=0.2m

[0055] The soil bulk density is: W=...

Embodiment 3

[0063] Example 3 Cd and Pb in the soil are extracted by inoculating heavy metal-activated bacteria in the small flying grass

[0064] (1) Small flying grass breeding

[0065] Seeds are used to germinate small flying grass. First, vernalize at a low temperature of 3°C for about 70 hours, and then control the temperature at about 30°C and the humidity at about 80% to germinate in a greenhouse.

[0066] (2) planting and growth of plants

[0067] Sow germinated seeds of small flying grass, about 100 seeds per m 2 . Planted in moist soil and covered with soil, it can be planted at an ambient temperature of 35°C in South China. Plants can grow in soil polluted with cadmium 10-200mg / kg and lead 400-3000mg / kg, and accumulate and extract heavy metals.

[0068] (3) Rhizosphere heavy metal activated bacteria inoculation

[0069] Inoculate heavy metal-activated bacteria in the rhizosphere, mix Bacillus: Pseudomonas at a ratio of 1:1, and inoculate 10 per kilogram of soil 6 Bacteria / ...

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Abstract

The invention relates to a method of restoring plants that are polluted by heavy metal with little hairy euphorbia or interplant of the little hairy euphorbia and ramie planted in the heavy metal polluted field, or inoculating heavy metal activated bacteria that are bacillocin or pseudomonas after planting the above-mentioned plants. With above-mentioned plant which absorbs heavy mental and the activated bacteria that breaks heavy metal away from the plant 's root and activates them, the invention makes the heavy metal polluted field restored quickly and effectively.

Description

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Claims

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Application Information

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Owner SOUTH CHINA UNIV OF TECH
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