Method for remediating cadmium contaminated soil by using ornamental plant smooth joyweed

A technology for cadmium-contaminated soil and ornamental plants, applied in the restoration of polluted soil, etc., can solve problems such as lack of independent intellectual property rights, difficulty in large-scale promotion and application, difficult cultivation and specialization, etc., to beautify damaged polluted sites, technology Effects with low requirements and good ornamental value

Inactive Publication Date: 2011-01-12
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some enrichment / hyperaccumulation plants found at present have problems such as lack of species, small biomass, slow growth, difficult cultivation and strong specificity, and are difficult to operate in actual use and difficult to promote and apply on a large scale (Document 5: Zhou Dongmei , Hao Xiuzhen, Xue Yan, etc. Research Progress on Remediation Technology of Contaminated Soil. Ecological Environment, 2004, 13(2): 234-24)
For the heavy metal cadmium, the hyperaccumulator plants found are quite limited, and there is even a lack of plants with independent intellectual property rights in my country.

Method used

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  • Method for remediating cadmium contaminated soil by using ornamental plant smooth joyweed
  • Method for remediating cadmium contaminated soil by using ornamental plant smooth joyweed
  • Method for remediating cadmium contaminated soil by using ornamental plant smooth joyweed

Examples

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Effect test

Embodiment 1

[0016] Example 1: Absorption of cadmium by red amaranth under hydroponic conditions

[0017] Experimental method: This experiment was carried out in the artificial climate room of the Environmental Protection Research and Monitoring Institute of the Ministry of Agriculture. Plant seeds are soaked in 1% sodium hypochlorite solution for 10 minutes and rinsed thoroughly with sterile water, then scalded with warm water at 35°C, soaked for 8 hours after natural cooling, and sown in a mixture of perlite and vermiculite sterilized by high temperature and high pressure (1∶1) ) On the substrate, sprinkle a layer of fine vermiculite to cover the seeds, and germinate in an artificial climate room (temperature 25°C, light time 16h). It was cultured with deionized water every day, and after the 3-leaf stage, it was watered with 1 / 4 Hoagland medium (Hoagland and Arnon, 1938). One week after the culture solution was watered, healthy seedlings of the same size were selected and transferred to a...

Embodiment 2

[0023] Example 2: Enrichment characteristics of red amaranth for Cd under soil culture conditions

[0024] Experimental method: This experiment was carried out in the glass greenhouse of the Environmental Protection Research and Monitoring Institute of the Ministry of Agriculture. The pot experiment was carried out with cadmium contaminated soil, the soil pH was 6.6, and the total amount of cadmium was 4.5 mg / kg. The soil is air-dried, sieved, and thoroughly mixed. Fill pots with 5kg soil per pot, apply urea, ammonium dihydrogen phosphate and potassium sulfate to make N, P, and K reach 150, 100, and 150 mg / kg, respectively. After the seeds are disinfected with 1% sodium hypochlorite solution for 10 minutes, they are washed, and the seeds are scalded with 35°C warm water, and soaked for 8 hours after natural cooling. Sow about 8 seeds in each pot, thinning after emergence, leave 2 plants in each pot, watering regularly, and harvest after 2 months of growth. Plant roots, stems, ...

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Abstract

The invention relates to phytoremediation technology in a heavy metal contamination environment, in particular to a method for remediating cadmium contaminated soil by using an ornamental plant smooth joyweed. In the method, the smooth joyweed (preserved in National Crop Germplasm Conservation Center, and the variety name is J589193) is planted on cadmium contaminated soil (including wet land), and a great amount of cadmium in the contaminated soil is absorbed through the root system of the smooth joyweed and is transferred to an overground part of the plant. When the plant grows to the end of the growing period or the biomass of the overground part is maximum, the overground part of the plant is moved away from the contaminated soil and is subjected to proper treatment, and the aim of continuously extracting and removing cadmium from the soil is fulfilled by repeatedly planting the plant and repeating the process. By remediating and treating the cadmium contaminated soil by using the enriched plant smooth joyweed, the method has the advantages of high efficiency, low cost, high operability, easy popularization and application, no damage to soil structure, no secondary contamination and the like, and also has good effect on soil erosion prevention and landscaping in contaminated fields.

Description

【Technical Field】 [0001] The invention belongs to the technical field of phytoremediation of heavy metal pollution of the environment, and in particular relates to a plant that is resistant to heavy metal cadmium and efficiently absorbs and concentrates and its application method on cadmium-contaminated soil. 【Background technique】 [0002] Heavy metal pollution is one of the main forms of soil pollution and one of the most prominent problems, seriously threatening crop yield, quality and food chain safety. The pollution mainly comes from waste water, waste gas, waste residues discharged from mining, smelting, electroplating, chemical, waste incineration and other industries, as well as automobile exhaust emissions, pesticides and fertilizers. According to reports, the area of ​​cultivated land polluted by heavy metals such as cadmium (Cd), chromium (Cr) and lead (Pb) in my country is nearly 20 million ha. 2 , Accounting for about 1 / 5 of the total cultivated land area. According...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 丁永祯唐世荣傅芳生宋正国邓小芳郭军康周莉孙克群
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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