Application of Trifolium repens in remediation of heavy metal contaminated soil

A technology for polluted soil and white clover, applied in the field of environmental pollution control, can solve the problem that plant resources cannot meet actual needs and other problems, and achieve the effects of good composite treatment effect, considerable enrichment amount and good enrichment effect.

Active Publication Date: 2012-06-27
浙江博世华环保科技有限公司
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the plant resources currently available for the remediation of copper, cadmium, and lead-contaminated soil

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
  • Application of Trifolium repens in remediation of heavy metal contaminated soil
  • Application of Trifolium repens in remediation of heavy metal contaminated soil
  • Application of Trifolium repens in remediation of heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The experimental site is located in Zhejiang Gongshang University, Hangzhou City, Zhejiang Province, China, with geographic coordinates of 120°7′ east longitude and 30°17′ north latitude.

[0025] The contaminated soil was taken from the long-term storage area of ​​electronic products in Wenling, which was mainly composed of soils contaminated by heavy metals such as copper, cadmium and lead. Put the polluted soil taken into pots, the size of the pots is 20 (diameter) cm×17 (height) cm, and each pot is 2.5 kg. It was determined that the heavy metal contents of copper, cadmium and lead in the test soil were 69.6 mg / kg, 1.16 mg / kg and 81.3 mg / kg, respectively.

[0026] The first cycle of planting: On September 16, 2009, the white clover was directly sown in the soil to be tested, 30 seeds per pot were sown, and the emergence rate was about 85%. The uncontaminated soil was used as the control (CK). In the seedling stage, water should be replenished in time to keep the soi...

Embodiment 2

[0045] The test site is located in Tongshan Village, Wenqiao, Wenling City, Zhejiang Province, China. The geographical location is 28°38′ north latitude and 121°27′ east longitude, which is a dense area of ​​small dismantling sites for solid waste. The main land use type of the plot is farmland, where rice and vegetables are mainly grown, and the surrounding area is residential buildings. The test results found that the main pollutants in the surface soil of this block are heavy metals, mainly copper, cadmium, and lead, which pose a great threat to the safety of local agricultural products. According to the restoration standards, the restoration targets for copper, cadmium, and lead are 50mg / kg, 0.3mg / kg, and 50mg / kg, respectively.

[0046] At the end of September 2010, white clover was planted. Soak the purchased white clover seeds in clean water for 24 hours, sprinkle them into the well-leveled soil at a density of 0.5 grams per square meter, and cover with a thin layer of s...

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 an application of Trifolium repens in remediation of heavy metal contaminated soil, comprising planting Tifolium repens in the remediation of heavy metal contaminated soil; when Tifolium repens plants grow to the initial flowering stage, carrying out a first clipping on the above-ground portion of the plants; when the plants continue growing to the adult stage and the early bud stage, carrying out a second clipping on the above-ground portion of the plants; when the plants continue growing to the full flowering stage, removing the whole plants; wherein the heavy metal is one or more of copper, cadmium and lead. According to the invention, the Tifolium repens plants are planted in the heavy metal contaminated soil, the Tifolium repens can absorb and accumulate the heavy metal in the soil during the growing process, through harvesting the above-ground portion at fixed period and harvesting the underground portion at fixed period and repeating the planting a few times, the purpose of reducing the heavy metal content in the soil can be achieved, thus the remediation of the heavy metal contaminated soil is realized. The method has the advantages of simple operation and good remediation effect, and is easy to popularize.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to the application of white clover in repairing heavy metal polluted soil. Background technique [0002] With the rapid development of economic globalization, the heavy metal pollution of global land is becoming more and more serious. Industrial "three wastes" and vehicle exhaust emissions, sewage irrigation and the abuse of pesticides and fertilizers have caused serious environmental and heavy metal pollution. The use of heavy metal-enriching plants for soil remediation is one of the research hotspots in environmental science today. Heavy metals in soil are non-biodegradable and relatively stable. Therefore, the use of plants to remediate heavy metal pollution sites is to solve the problem of heavy metal pollution in the environment. It has shown great potential in the remediation of heavy metal soil pollution, and it has many characteristics such as low in...

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): B09C1/00B09C1/10
Inventor 陈昆柏况武田伟莉
Owner 浙江博世华环保科技有限公司
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