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 and other directions, can solve the problems of difficulty in large-scale popularization and application, lack of independent intellectual property rights, difficult cultivation and specialization, etc. The effect of damaging the polluted site and improving the ornamental value

Inactive Publication Date: 2012-08-22
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI +1
View PDF0 Cites 6 Cited by
  • 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

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
  • 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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Absorption of red amaranth to cadmium 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 fully rinsed with sterile water, scalded with warm water at 35°C, soaked for 8 hours after natural cooling, and spread in a mixture of perlite and vermiculite (1:1) sterilized by high temperature and high pressure. ) substrate, sprinkle a layer of fine vermiculite to cover the seeds, and germinate in an artificial climate chamber (the temperature is 25°C, and the light time is 16h). Add deionized water every day for cultivation, and after the 3-leaf stage, use 1 / 4 Hoagland culture medium (Hoagland and Arnon, 1938) to irrigate instead. One week after the culture solution was poured, healthy seedlings of the same size were selected ...

Embodiment 2

[0023] Example 2: The enrichment characteristics of red amaranth to 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. Pot experiments were carried out with cadmium-contaminated soil, the soil pH was 6.6, and the total amount of cadmium was 4.5mg / kg. The soil is air-dried, sieved, and thoroughly mixed. Put in pots, 5 kg of soil in each pot, and apply urea, ammonium dihydrogen phosphate and potassium sulfate to make N, P, and K reach 150, 100, and 150 mg / kg, respectively. The seeds were sterilized with 1% sodium hypochlorite solution for 10 minutes, washed, scalded with warm water at 35°C, cooled naturally and then soaked for 8 hours. Sow about 8 seeds in each pot, thin out the seedlings after emergence, and keep 2 plants in each pot, regularly water and manage them, and harvest after the plants grow for 2 months...

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 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 theenriched 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-polluted environments, and in particular relates to a plant which has tolerance to heavy metal cadmium and efficiently absorbs and enriches the plant and its application method on cadmium-polluted soil. 【Background technique】 [0002] Heavy metal pollution is the main form and one of the most prominent problems of soil pollution, which seriously threatens crop yield, quality and food chain safety. Its pollution mainly comes from waste water, waste gas, and waste residue discharged from industries such as mining, smelting, electroplating, chemical industry, and waste incineration, as well as vehicle exhaust emissions, and the application of 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 hm 2 , accounting for about 1 / 5 of the total...

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): B09C1/00B09C1/10
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
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