Method for restoring heavy-metal-contaminated soil by utilizing oil sunflower planting

A technology that pollutes soil and heavy metals, applied in the field of phytoremediation, can solve the problems of low absorption and accumulation of heavy metals, poor practical application effect, and no economic benefits, etc., to achieve strong drought resistance, low management costs, and high medicinal value. Effect

Active Publication Date: 2014-03-19
HUNAN AGRICULTURAL UNIV
View PDF6 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for repairing heavy metal-contaminated soil by using oil sunflower planting to solve the problems of slow plant growth, low biomass and absorption The total amount of accumulat

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 restoring heavy-metal-contaminated soil by utilizing oil sunflower planting
  • Method for restoring heavy-metal-contaminated soil by utilizing oil sunflower planting
  • Method for restoring heavy-metal-contaminated soil by utilizing oil sunflower planting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 Soil remediation test in polluted mining area

[0021] The test site is the farmland polluted by heavy metals in the mining area of ​​Chenzhou, Hunan. The soil of the farmland is the composite polluted soil of heavy metals Cu, Zn, Pb, Cd and As. The background values ​​of heavy metals in the soil are shown in Table 1.

[0022] Table 1 Background values ​​of heavy metals in soil

[0023] Cu

Zn

Pb

Cd

As

Hg

82.04

394.96

611.44

9.99

457.88

1.63

[0024] The specific method is: from May to June, plant the oil sunflower in the field in the heavy metal complex polluted area, select the suitable land with deep loose soil, carry out conventional cultivation and fertilization, live seed the oil sunflower in the polluted soil, and prepare the seedlings. Long-term antifreeze measures, follow-up pest and disease management, and field moisture management, and timely topdressing.

[0025] The test soil was coll...

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 method for restoring heavy-metal-contaminated soil by utilizing oil sunflower planting. The method comprises the following steps of planting oil sunflower in the heavy-metal-contaminated soil according to a natural growing period, and conventionally culturing the oil sunflower. The oil sunflower rapidly grows and has strong root systems, biomass of the overground part of oil sunflower is large, the oil sunflower is drought-resisting and barren-resisting property, has strong tolerance and enrichment property to heavy metal, can grow normally in the heavy-metal-contaminated soil and no obvious poison symptoms appear. The method provided by the invention has the advantages that the selected oil sunflower can absorb and accumulate a large quantity of multiple heavy metals, and particularly, the contents of heavy metals such as Cu, Pb, Cd and As in the plant reach a high enrichment level, and the problems in the existing heavy-metal-contaminated soil restoring technology that the plants slowly grow, the biomass is low, the total quantity of absorbed and accumulated heavy metals is small, the plants only have the tolerance and enrichment capacity to a single heavy metal, does not have the good economic benefits, and has poor practical application comprehensive result.

Description

technical field [0001] The invention relates to a phytoremediation technology for soil polluted by heavy metals, in particular to a method for repairing soil polluted by heavy metals by planting oil sunflowers. Background technique [0002] Phytoremediation of heavy metal-contaminated soil refers to removing, volatilizing or stabilizing heavy metal pollutants in the soil environment through plant systems and their roots, or reducing the toxicity of heavy metals in pollutants, in order to achieve the goal of removing pollution, repairing or treating soil. A technique for the purpose. For example, in 2003, Feng Ruotao used indoor cultivation of castor, sunflower, and corn seedlings to remove cadmium in water. The analysis showed that the stems and leaves of the seedlings had a very good effect on the accumulation of cadmium. Phytoremediation of cadmium-contaminated water in some traditional crop seedlings has good application prospects, so phytoremediation will be a major res...

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
IPC IPC(8): B09C1/00
Inventor 曾清如杨洋陈璘涵彭亮
Owner HUNAN AGRICULTURAL 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
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